Mine working maintenance method

FIELD: mining.

SUBSTANCE: mine working maintenance method mainly for mine openings reinforced with anchor support involves reinforcement of row anchors installed at drilling at the displacement period of roof rocks of the mine working by installing additional anchors into the broken roof rocks of mine working with their fastening in bore pits by means of ampule. In order to slow down the displacement process of rocks in local section of rock delamination of the anchored roof of the operated mine working, reinforcement of row anchors using additional anchors is made by dynamic impact on formation pressure intensity with possibility of roof rock reinforcement. Prior to installation of additional anchors there pre-evaluated are displacement values of roof rocks of mine working and when they exceed standard values, according to safety rules, there determined is the boundary of rock delamination zone of anchored roof of mine working. At that, bore pits for additional anchors are drilled into mine working roof within the designated boundary of the above zone with their location on staggered order in relation to row anchors. After that, first, ampules are delivered to each bore pit; they contain expanding composition the solidification time of which is more than solidification time of ampule with quick-acting fixing agent, which is arranged in the opening of bore pit after the deep part of the bore pit is filled with ampules with expanding composition. At that, at installation into bore pits of additional anchors within the boundary line of rock delamination zone of anchored roof of mine working with destruction of ampules in them owing to spread of expanding composition of ampules around those anchors with its further solidification in deep part of bore pits and compression of reinforced rocks there formed are rock blocks around additional anchors with increased side bracing between them, which contributes to occurrence of adhesive forces of delaminated roof rocks as to their lamination and formation of reinforced zone in roof of mine working in local section of its delamination.

EFFECT: increasing mine working maintenance efficiency.

4 cl, 4 dwg

 

The invention relates to the mining industry, mainly for coal, and in particular to methods of maintaining mining in conditions of high rock pressure with the use of additional means of strengthening the main supports for example the anchor supports.

The known method of improving bearing capacity of stratified part of the roof of the mine workings, including the drilling of the main injection and an additional mounting wells, the installation of the anchors in the mounting hole and the injection through the injection wells binder solution in the array, then produce tension anchors to the convergence between the adjacent layers of the roof framing (1).

The disadvantage of this method is that although it provides bond adjacent layers of the roof framing, however, post-tensioning anchors formed unfortified part of the roof at the location of the downhole portion of the bore-holes, which leads to delamination of the anchored part of the thickness of the roof rocks from the overlying main roof and consequently to the loss of bearing capacity of the roof framing, not ensuring safe conditions for its maintenance.

There is a method of maintaining a mining fixed anchor support, including strengthening established during the sinking of ordinary anchors during the displacement of the roof rock generation by setting and additional anchors in the stratified rocks of the roof framing (2) (see source 2, pp.5-11, p.29-31). Moreover, extra anchors in the holes with fixing them by means of vials with quick composition carried out similarly to the installation of ordinary (plain) anchors, as provided by the regulations on the calculation and use of anchor supports in coal mines in Russia" (source 2, p.48).

However, as is known from theory of mining geomechanics, during operation of generation, fixed anchor support, interaction between a previously formed around the anchors of the rock blocks it begins to weaken due to the loss of the adhesion forces between the layers of the roof framing in terms of the manifestations of increased horizontal stresses due to the reference pressure of overlapping strata of rocks on the side of the rock generation. As a result, there is a danger of a slice anchor contact between the layers, which can lead to the collapse of the roof rocks. Moreover, this mechanism of interaction of anchors with roof rocks also have additional means of amplification, i.e. additional anchors (see source 2, p.10-11). Hence the disadvantage of this method is the strengthening of ordinary anchors by means of additional anchors may not significantly affect the slow process of delamination and the displacement of the roof rocks and accordingly to increase its bearing capacity.

In addition, this method does not provide additional impact on the manifestation of the deformation properties of rocks of the roof framing, which would have affected the increase of the adhesion forces stratified rocks of the roof and hence the strengthening of delaminated roof framing in the course of its operation, since the securing of additional anchors carry vials with quick composition no extensions property.

From the above shortcomings, it follows that there is a method (2)adopted for the prototype, not effective enough, has limited technological capabilities, because it can only be used in areas of development the damaged elements of the support, for example in cases of rupture of tightening or buckling of elastic elements, and does not address the issues of strengthening anchor lining with the aim of slowing down the process of displacement of the roof rock excavation areas stratification and thus improve the bearing capacity of the roof framing.

The problem solved by the claimed invention is to improve the efficiency of maintenance by increasing the bearing capacity of stratified anchored to roof framing on individual local areas, due to the strengthening of the rock due to the impact of the expanding composition of the vials on the rock mass of the roof framing.

<> The technical result, which provides the solution of the problem, reflected in the improvement of conditions for the maintenance of generation, fixed anchor support, maintaining a healthy state of anchor fasteners in the entire life developing in the conditions of manifestation of the intensity of rock pressure.

To achieve these objectives with the claimed technical result in the way of maintaining mining, mainly workings, fixed anchor support, including strengthening established during the sinking of ordinary anchors during the displacement of the roof rock production by installing additional anchors in the stratified rocks of the roof framing with fixing holes in the ampoule according to the claimed invention, for slowing down the process of displacement of the rocks on the local section of the bundle of rocks anchored roof operated mining strengthening of ordinary anchors with additional anchors are provided by a dynamic impact on the manifestation of the intensity of rock pressure with the possibility of strengthening the roof rocks, pre-before you install additional anchors again appreciate the magnitude of the displacement of the roof rocks develop and when they are exceeding the legally established according to the rules of security led the rite define the boundary zone stratification of rocks anchored to roof framing, moreover, the blast holes for optional anchor drill into the roof framing in the designated boundary of the said zone with their staggered relative to those of ordinary anchors, then first in every hole posylaut capsules with expanding composition in its deepest part, the hardening time of which is longer than the time of hardening of the capsules with quick-fixing composition, which is placed in the mouth of the hole after filling ampoules with expanding composition of the deep part of the hole, when installed in boreholes additional anchors in the border zone stratification of rocks anchored to roof framing with the destruction of them in vials due to the distribution of the expanding composition of the capsules around these anchors with its subsequent curing in the deep part of the bore-holes and compression strengthen rocks are formed rock blocks around additional anchors with increased lateral thrust between them, contributing to the manifestation of the forces of adhesion stratified rocks of the roof on their development and education fortified zone in the roof framing in its local area of the bundle.

And the vial placed at the mouth of the hole, has a minimum time of hardening, equal to 20-30 seconds, and the hardening time of vials with expanding composition placed in the deepest part of the hole, is 2-3 times more.

It is advisable to provide the tion resistance additional anchors lateral shifts of rocks unconformity as the last to use stalepolimernyh anchor high bearing capacity.

The length of additional anchors take depending on the height of the area stratification of rocks anchored to roof framing.

Conducted by the applicant's analysis of the prior art, including searching by the patent and scientific and technical information sources, and identify sources that contain information about the equivalents of the claimed invention, has allowed to establish that the applicant had not discovered similar, characterized by signs, identical with all the essential features of the claimed invention set forth in the claims.

Therefore, the claimed invention meets the criterion of "novelty".

The causal link between the claimed set of essential features and achievable technical result is the following.

Sign - "for slowing down the process of displacement of the rocks on the local section of the bundle of rocks anchored roof operated mining strengthening of ordinary anchors with additional anchors are provided by a dynamic impact on the manifestation of the intensity of rock pressure with the possibility of strengthening the roof rock" - is a fundamental and indicates technological possibility feasibility of strengthening the stratified rocks of the roof framing on the areas of increased displacement of the roof rock excavation. In is the result of improved conditions for maintaining excavation with the preservation of its operational characteristics. In addition, the implementation of this sign are not technologically difficult, does not require significant operating costs, thereby improving the efficiency of work to maintain output.

Sign - "for what before you install additional anchors appreciate the magnitude of the displacement of the roof rocks develop and when they are exceeding the legally established according to the rules of safety values define the boundary zone stratification of rocks anchored to roof framing allows you to assess the degree of displacement of the roof rock generation (according to the regulations the amount of offsets should not be more than 50 mm), respectively, and to identify local areas of increased displacement of the roof rocks and then work on strengthening anchor of support in these areas according to the claimed method.

That is, this characteristic is guaranteed anticipates the possibility of strengthening anchor lining within the boundaries of the zone stratification of the rocks of the roof, excluding thus skipping the dangerous condition of the anchor supports.

A sign - "the blast holes for optional anchor drill into the roof framing in the designated boundary of the said zone with their staggered relative to those of ordinary anchors" - describes the layout of the holes and, accordingly, additional anchors specified in the region in relation to ordinary anchors, that enables you to evenly place additional reinforcing anchor on the local section of the bundle of roof rock generation, i.e. the characteristic necessary for the implementation of the method.

Sign - "after this first in every hole posylaut capsules with expanding composition in its deepest part, the hardening time of which is longer than the time of hardening of the capsules with quick-fixing composition, which is placed in the mouth of the hole after filling ampoules with fast-curing composition of the deep part of the hole" - is new and describes the adopted sequence of feeding vials in bore-holes having different compositions and different times of the setting that determines the ability to create dynamic effects on the deformation condition of the roof rocks develop due to exposure to the expanding composition vials and accordingly strengthening of roof rocks on its local sections of the bundle. In addition, the closure of the borehole mouth of the vial with a fast-curing composition provides its seal during installation of the anchor, thus creating conditions for penetration of the expanding composition in the destroyed rocks.

Sign - "at the same time when installed in boreholes additional anchors in the border zone stratification of rocks anchored to roof framing with the destruction of them in vials due to dissolved, and the estrangement of the expanding composition of the capsules around these anchors with its subsequent curing in the deep part of the bore-holes and compression strengthen rocks are formed rock blocks around additional anchors with high side the thrust between them, contributing to the manifestation of the forces of adhesion stratified rocks of the roof on their development and education fortified zone in the roof framing at her local area stratification" - is a fundamental and characterizes geomechanical formation zone of fortifications, consisting of the dynamic impact of the expanding composition ampoules, disposable in the deep part of the bore-holes, destroyed the breed, and they shrink after curing, resulting in the formation of rock units around additional anchors with increased lateral thrust between them, i.e. the characteristic taking into consideration the above solves the problem, namely by strengthening the stratified rocks of the roof is provided by the slow process displacements of rocks and accordingly increases the bearing capacity of stratified rocks of the roof framing. The specified task of the proposed method cannot be resolved by the prototype (2), since it involves only the securing of additional anchors in the holes with the creation of weak lateral thrust between their rock blocks which is not sufficient for the manifestation of the adhesion forces stratified rocks of the roof framing.

Sign (2 formulas) - "the vial placed at the mouth of the hole, has a minimum time of hardening, equal to 20-30 seconds, and the hardening time of vials EXT is available composition, placed in the deep part of the hole, is 2-3 times more" - allows you to produce a reliable sealing of the hole, thus preventing the possibility of leakage of the expanding part of the ampoule after the mixing, which increases the effect of the penetration of the expanding composition in the destroyed layers of rocks.

This effect cannot be achieved by the prototype (2), because in it for fixing holes in a normal (ordinary) anchors, as well as additional anchors, use capsules with rapid hardening composition, in which the hardening time of the first (deep) ampoule is 15-30 seconds, and the rest of the vials is 2-3 times more (see source 2, p.48), resulting in only fixing anchors into the holes without spreading the composition of the vials in the destroyed rocks surrounding the borehole.

From the above it follows that the usefulness of this trait is obvious.

The sign (item 3 in the formula) - "to ensure the resilience of additional anchors lateral shifts of rocks unconformity as additional anchors use stalepolimernyh anchor increased carrying capacity" - excludes the possibility of additional slice anchors along the contact between layers in conditions of high horizontal stresses, which provides a safe state of the installed lining amplification, which are an additional the EPA.

Sign (4 formulas) - "the length of additional anchors take depending on the height of the area stratification anchored to roof framing" - regulates the length of the optional anchor, to ensure the strengthening of the rocks on the depth of their bundle.

Thus, the set of essential features that characterize the essence of the invention, improves the efficiency of maintenance delaminated roof framing by strengthening breeds, due to the influence of extender composition of the vials on the rock mass of the roof framing.

All these technical effects allow you to solve the problem is to increase the load bearing capacity of stratified anchored to roof framing on individual local sections of the bundle.

It follows that the essential features of the claimed invention are in causal relationship with achievable technical result and the prior art in this field does not clear the way for a specialist, and therefore the claimed invention meets the criterion of "inventive step".

Implementation of the proposed method is technologically feasible, since it does not require any sophisticated technical means, not known in the field of securing mining anchor lining. This allows us to state that the Declaration is by way meets the criterion of "industrial applicability".

Declare on the subject of the invention is a method of maintaining a mining proves the following description and drawings in figures 1-4. While figures 1-4 shows:

- figure 1 - yield, fixed ordinary anchors, reinforced by additional anchors on the local area of delaminated roof rocks (rock blocks around ordinary anchors shown in dashed lines, and rock blocks around additional anchors - solid line), the cross-section;

- figure 2 is a view along arrow a, the scheme of placement of additional anchors in relation to ordinary anchors (circles marked the contours of ordinary and additional anchors poured strengthen breed conventionally not shown), view from above;

- figure 3 - General view of the additional reinforcing anchor at the time of its installation in the borehole filled with vials, transverse incision;

- figure 4 is a section along B-B of figure 2, the moment acting on the shattered rocks of the expanding composition vials additional anchors (the arrows indicate the direction of propagation of the expanding composition, the dashed line shows the rock blocks around ordinary anchors, and a solid line - rock blocks around additional anchors poured strengthen breed conventionally not shown).

According to theory of mining geomechanics in mining of rocks in which the process of carrying out production is the violation of the equilibrium state of a rock mass, which leads to the redistribution of stresses and strains in the masses, as well as intensive displacement in the cross section of the driven working. To resist external forces in a rock mass, and the resulting reaction forces and stress, when carrying out excavation install bolting, which codifies the rocks on the path of ongoing development, suspending thus at the initial stage of the spreading forces of the stress state. When this broken system stress state of the rock mass around the excavation contour comes in the equilibrium state. Simultaneously, the horizontal stress in the initial period of installation of anchor lining in the ongoing development have a positive impact on sustainable development and contribute to the creation of lateral thrust between rock blocks forming around the anchors during installation, while maintaining the adhesion forces of the rocks in their development.

During operation of excavation in terms of the manifestation of the intensity of rock pressure vertical force of the stress state of the masses accept predominant over the forces of horizontal stresses. As a result, the rocks composing the roof framing, formed t is Emini, which reduce adhesion formation that leads to displacements of the layers relative to each other on the circuit output. This weakens the lateral thrust between rock blocks anchors, which can lead to the collapse of the roof. Therefore, in order to prevent the possible collapse of the roof rock generation, it is necessary to use additional means to strengthen the anchor supports.

Way to keep mining that fixed anchor support is considered typical for mining and geological conditions of their operation and which is as follows.

According to the claimed method after carrying out excavation 1 and its mounting usual ordinary anchors 2 control health anchor lining, since the elaboration 1 during operation falls under the influence of manifestation of the intensity of rock pressure. Therefore, the areas of most severe conditions maintenance of generation 1 every 80-100 m set by the well-known recommendations (see source 2, p.29-31) deep frame 3 to control the magnitude of displacement of the roof rocks. Then, as soon as any of the observed plot generation 1 will be visually recorded by the depth of the frame 3 the critical value of detached rocks anchored roof of the output from the overlying roof, p is izvodyat strengthening of ordinary anchors 2 on the local site of generation 1. Moreover, the necessity of this gain is due to the fact that the above-mentioned delamination anchored to the roof caused by the weakening of the lateral thrust between rock blocks 4 ordinary anchors 2 and accordingly forces the clutch stratified rocks of the roof framing 1.

The increased ordinary anchors 2 during the detection of the displacement of the roof rock generation 1 is carried out by installation of additional anchors 5 in the stratified rocks of the roof, which provide a dynamic influence on the manifestation of the intensity of rock pressure, which is carried out in the following sequence (figure 1 and 2).

Before install additional anchors 5 again on the testimony of the deep frames 3 assess the magnitude of the displacement of the roof rocks 1 and in case of improvement of normative set according to rules of safety values, i.e. more than 50 mm (see source 2, p.29-31), define the boundary 6 zone 7 stratification of rocks anchored to roof framing 1, which is a local section of the bundle of rocks anchored roof. The definition of the boundaries of the 6 mentioned zone 7 perform one of the famous traditional ways of determining the state of the deformed rocks in the mountain array, for example by drilling control holes, the nature of the output of rubble from which the drilling tool failures when is uranie holes judge cracks, laminations and the border of their distribution.

Then marked the boundary of the 6 mentioned zone 7 drilling the holes 8 in the roof framing 1 under additional anchor 5 with their staggered with respect to member 2 anchors. This arrangement mentioned anchors 2 and 5 relative to each other enables you to evenly place additional anchors 5 within the boundaries of the 6 specified zone 7.

After this first and foremost in every hole 8 posylaut ampoule 9 with expanding composition in its deepest part, the hardening time of which is longer than the time setting of 10 ampoules with quick-fixing composition, which is placed in the mouth of the hole 8 after filling, the vials 9 deep part of the hole 8 (Fig 3).

Thus placing the ampoules with 10 fast-curing composition in the mouth of the bore-holes 8 provides a seal during installation, additional anchors 5, creating conditions for the directional penetration of the expanding composition vials 9 in the destroyed rocks.

Then proceed to install in the holes 8 additional anchors 5 within the boundaries of the 6 zone 7 bundles of roof rocks, during which due to the translational-rotational motion of the anchor destroy 5 ampoules 10, and then the ampoule 9, stirring so their components. When this happens securing additional anchors 5 at the mouth of the bore-holes 8 and simultaneously expand distribution is eghosa composition vials around 9 additional anchors 5 (as shown in figure 4) with its subsequent curing in the deep part of the holes 8 and the compression strengthen rocks, as a result of this form of rock blocks 11 around the bolt 5 with a high side thrust between them. And this, in turn, contributes to the manifestation of the forces of adhesion stratified rocks of the roof on their development and education fortified zone in the roof framing on the local area stratification, providing increased bearing capacity of delaminated roof.

Analogous to the described order gain additional anchors 5 due to dynamic effects on the manifestation of the intensity of rock pressure exercised by the strengthening of ordinary anchors 2 other local areas, which revealed the dangerous condition of the anchor supports.

The vial 10 with fast-curing composition placed in the mouth of the hole 8 has a minimum time of hardening, equal to 20-30 seconds, and the time of hardening of 9 vials with expanding composition placed in the deepest part of the hole 8, is 2-3 times more mentioned ampoule 9. This sequence of hardening composition vials 9 and 10 in hole 8 provides sealing the mouth of the hole 8, to prevent the output of the expanding composition vials 9 after mixing in hole 8, thus creating a condition of dynamic influence of the expanding composition of the shattered rocks of the roof.

To provide additional resistance of anchors 4 lateral shifts the location for development in the conditions of manifestation of the intensity of rock pressure as the latter is used stalepolimernyh anchor high bearing capacity, in General, increases efficiency-enhancing additional anchors, ensuring safe conditions of production.

To ensure the strengthening of the rocks on the depth of their bundle length additional anchors take 5 depending on the height zone 7 bundles anchored to roof framing.

Thus, the use of the proposed method will improve the load bearing capacity of stratified anchored to roof framing on individual local areas, due to the strengthening of the rocks due to the dynamic influence of the expanding composition of the vials on the rock mass of the roof framing.

Sources of information

1. USSR author's certificate No. 926314, CL 21D 20/00, 1980

2. Instructions for the calculation and application of anchor supports in coal mines in Russia: Appr. The head of the Committee for the coal industry in the Ministry of energy of the Russian Federation 12.04.2000, S.-Petersburg, 2000. - p.5-11, 29-31, 48.

1. Way to keep mining, mainly workings, fixed anchor support, including strengthening established during the sinking of ordinary anchors during the displacement of the roof rock production by installing additional anchors in the stratified rocks of the roof framing with fixing holes in ampoules, characterized in that to slow down the process of displacement of the rocks on the local teaching is de stratification of rocks anchored roof operated mining strengthening of ordinary anchors with additional anchors are provided by a dynamic impact on the manifestation of intensity rock pressure with the possibility of strengthening the roof rocks, pre-before you install additional anchors again appreciate the magnitude of the displacement of the roof rocks develop and when they are exceeding the legally established according to the rules of safety values define the boundary zone stratification of rocks anchored to roof framing, and the blast holes for optional anchor drill into the roof framing in the designated boundary of the said zone with their staggered relative to those of ordinary anchors, then first in every hole posylaut capsules with expanding composition in its deepest part, the hardening time of which is longer than the time of hardening of the capsules with fast fixing composition, which is placed in the mouth of the hole after filling ampoules with expanding composition of the deep part of the hole, when installed in boreholes additional anchors in the border zone stratification of rocks anchored to roof framing with the destruction of them in vials due to the distribution of the expanding composition of the capsules around these anchors with its subsequent curing in the deep part of the bore-holes and compression strengthen rocks are formed rock blocks around additional anchors with increased lateral thrust between them, contributing to the manifestation of the forces of adhesion stratified rocks of crawl is in their development and education fortified zone in the roof framing on the local area of its bundle.

2. The method of claim 1, wherein the ampoule is placed in the mouth of the hole, has a minimum time of hardening, equal to 20-30 s, and the hardening time of vials with expanding composition placed in the deepest part of the hole, 2-3 times more.

3. The method according to claim 1, characterized in that to ensure the resilience of additional anchors lateral shifts of rocks unconformity as the last use stalepolimernyh anchor high bearing capacity.

4. The method according to claim 1, characterized in that the length of additional anchors take depending on the height of the area stratification of rocks anchored to roof framing.



 

Same patents:

FIELD: mining.

SUBSTANCE: method of anchor installation includes drilling a blast hole in a mine wall, insertion of a spiral into it, as well as an anchor rod with a helical groove at the external surface and impression of the spiral turns into the blast hole walls. At the same time at first the spiral is inserted into the blast hole, and then the anchor rod is screwed into it, deforming the cross section of the spiral turns as they are impressed into the blast hole walls. Dimensions of the anchor rod are selected such that the cross section of the spiral turns in the initial condition is more than the distance between the blast hole walls and the bottom of the helical groove of the anchor rod.

EFFECT: increased reliability of anchor adhesion to blast hole walls.

8 cl, 3 dwg

FIELD: mining.

SUBSTANCE: method to support mines, preferably mines with preservation for subsequent use when working coal beds in long columns includes reinforcement of short anchors of the first phase installed when working in the mine roof by adding longer anchors of the second phase with their arrangement in staggered order in respect of the short anchors of the first phase and in the plane of the cross section of the mine. Additional long anchors of the second phase are hollow anchors with helical winding at their external surfaces. Besides, installation of the second phase anchors is carried out along the mine in separate sections, length of each one is accepted as corresponding to the length of the end part of the abutment pressure in the mining face equal to 0.3 l, where l is length of the mining face abutment pressure zone. At the same time conditions of mine support are ensured in the following order, first at the next section of the mine the specified anchors are installed simultaneously with mining face sweep to advance this mining face by 1.3 of the length of its abutment pressure zone, in front of which there is a section of the mine with the length equal to 0.3 l, with previously installed anchors of the second phase in front of the abutment pressure zone. And then, as the mining face is swept, as soon as the mine section with previously installed anchors of the second phase, located in front of the abutment pressure zone, gradually gets under the effect of the end part of the abutment pressure zone, the roof rocks flaked at this section are strengthened in stages by injection of a fixer solution into them via hollow anchors of the second phase, thus developing a strengthening zone in the mine roof, which helps to slow down the process of flaky cracks formation in the thickness of the mine roof rocks thickness. At the same time as works are completed to strengthen the roof rocks at the specified section of the mine being under effect of the end part of the abutment pressure zone, anchors of the second phase are again installed at the next section of the mine provided that the specified advancement of the mining face is observed, and flaked rocks of the roof are strengthened at the previous next section of the mine with installed anchors of the second phase after it gets under the effect of the end part of the mining face abutment pressure zone. Further as the mining face is swept, operations are continued as per the prescribed order to install anchors of the second phase in front of the zone of abutment pressure and strengthening of the flaked rocks of the mine roof in the period of effect of the end part of the abutment pressure zone at the specified sections of the mine corresponding to these operations.

EFFECT: preservation of the mine in the operational condition for repeated use behind the mining face.

2 cl, 5 dwg

FIELD: mining.

SUBSTANCE: during reinforcement of mine workings with anchor support, mainly of workings of rectangular shape of cross section, first, inclined bore pits are drilled into roof of working during the process and installation of anchors in them is performed with inclination towards the working face of mine working and towards its mouth, as well as installation of anchors with inclination onto the flanks of mine working. Together with drilling of inclined bore pits into the roof of mine working there drilled are inclined bore pits into flanks of the mine working; at that, bore pits for anchors are drilled into the roof and flanks of the mine working are drilled as per the specified mine rock anchoring scheme according to which installation of inclined anchors in bore pits is performed in rows. In each of the rows the anchors inclined towards the face of the mine working and anchors inclined towards the mouth of mine working are installed in bore pits in alternating order and with observation of the condition of their location in staggered order in relation to each other in adjacent orders. At that, drilling of inclined bore pits and installation of anchors in them in each row along the outline of mine working is performed following the face through the length of process displacement of the made mine working. Anchors inclined towards the face of mine working and its mouth are installed in each row at an angle to longitudinal axis of mine working, which is equal to 65-70, with possibility of their spatial crossing between adjacent rows of mine rocks reinforced with anchors along the outline of the mine working.

EFFECT: increasing reinforcement efficiency of mine workings and increasing labour safety.

6 dwg

FIELD: mining.

SUBSTANCE: construction of cement hopper for mining machine is an individual element. Mining machine is intended to drill holes in the rock and to pump cement to the holes, and includes mixer, cement hopper and supply device for supplying cement from lower cement hopper end to the mixer. At that, mining machine is equipped with moving device for moving the cement hopper between the position of being used at the top of the mining machine and the position of filling, which is different from the use position.

EFFECT: easy and simple loading and use of the mining machine hopper by workers.

6 dwg, 21 cl

FIELD: mining.

SUBSTANCE: method for supporting mine workings with thermal strengthening of unstable rocks involves drilling at the roof-to-bottomhole interface on each driving of vertical wells and in the section with them of inclined wells with the length exceeding the length of drivings by the value of the lock part of anchor, installation of anchors in them and engagement of vertical and inclined anchors with end parts at each driving. At that, one part of drilled wells is equipped with thermal elements providing the temperature at their combustion, which is enough for the required strengthening of rocks in the volume of solid mass section between neighbouring wells, and other part of wells is used for further support of mine working with anchors. Connection and interaction of inclined and vertical anchors between each other and with solid mass of rocks is provided by means of support angles and tension nuts.

EFFECT: improving reliability of use of rock bolting and increasing stability of mine workings at their development and support.

2 cl, 6 dwg

FIELD: mining.

SUBSTANCE: method for development of contiguous coal seams series includes downstream seams development, arrangement of development openings along overworked seam, strengthening of development openings and development of seams through long breakage faces. Area of higher overburden pressure zone location is identified in overworked seam, together with stress values in sections of massif along route of development opening arrangement that are located in zone of higher rock pressure. Depth of higher crack intensity area propagation in development opening roof rocks is identified for each section. Development openings are fixed by bolting, length of bolts is accepted as higher than depth of higher crack intensity area propagation in roof rocks. Development openings of overworked seam pass after completion of the second working related to formation of unworked coal edge parts and pillars along upper bed. With encapsulated fixation of bolts length of blasthole is determined using specified expression.

EFFECT: reduced costs for maintenance and enhancement of reliability in functioning of overworked seam development openings arranged in zones of higher overburden pressure.

2 cl, 2 dwg

FIELD: mining.

SUBSTANCE: method for reinforcement of mines includes drilling of inclined wells at roof and bottomhole coupling aligned at each cut of vertical wells, with length exceeding length of cuts by value of anchor locking part, installation of anchors in them and engagement of vertical and inclined anchors with their end parts at each cut. Fixation of anchor ends is done with the help of support angle having holes provided in its shelves, and nuts, one of which is used to tighten vertical anchor, and the other one is used to tighten anticipatory inclined anchor. At the same time number of cuts along length of inclined anchors in front row is selected depending on condition of roof rocks in front of bottomhole.

EFFECT: improved stability of mines roofs in areas of highly cracked rocks and in zones of ruptured tectonic disturbances.

3 dwg

Fluid regeneration // 2398968

FIELD: mining.

SUBSTANCE: after installation of mining anchor with anchor bolt, in particular expandable friction tubular anchor with end cartridge in front, into previously drilled well, adapter is installed on cartridge with the possibility to supply and drain the liquid. On the one hand, using injection pipeline of excess pressure maintenance, excess pressure is developed, which fixes adapter on cartridge. On the other hand, fluid rushes along expansion pipeline into anchor bolt and starts filling it. At the same time anchor bolt, due to pressure rise, under action of excess pressure, expands in drill hole, so that its external surface presses its walls and therefore fixes mining anchor in drill hole. Due to the possibility to supply gas with the help of adapter, pressurised gas, for instance compressed air, may be supplied into anchor bolt prior to and/or after its expansion.

EFFECT: compressed gas is bled after removal of adapter and almost fully drains fluid available in anchor bolt.

16 cl, 4 dwg

FIELD: mining.

SUBSTANCE: mine excavations fastening method during potassium salt field's development concludes in anchor bolts installation with rock bolting support and counterforce elements, the rock bolting made of polymer material Cover the rock surface between anchors with a protection element, made of polymer cloth, which does not allow moisture and water vapors penetration, at least in one side direction The polymer cloth fixed to the rock surface by pressing it to the rock with support elements The pit bolting for the rock excavation fastening during potassium fields development contains anchor bolts made of polymer material as bearing rods with support and counterforce elements, support slabs, installed between support elements and a mine roof rock, claw nuts and the protection element as a polymer cloth, which does not allow moisture and water vapors penetration, at least in one side direction, fixed on the mine roof with support slabs.

EFFECT: decrease of water vapor and pit aggressive waters influence on a mining equipment, operation casts decrease, undergoing mining equipment lifetime increase.

4 cl, 1 ex

FIELD: mining.

SUBSTANCE: invention is related to mining and construction of underground structures, namely to method for fixation of acute-angled couplings of mine tunnels. Method for fixation of acute-angled coupling of horizontal and inclined mine tunnels with anchors includes the following stages: their fixation along perimetre with mine-run anchors in process of tunneling, installation of through horizontal anchors from root into adjacent mine with lag from the bottomhole of the latter, installation of deep anchors into wedge-like block between mines in zone of their considerable mutual effect from root mine in direction of adjacent one before start of adjacent mine tunneling.

EFFECT: preliminary strengthening of acute-angled block between branching mine tunnels, reduced hazard of shaft-sinking and tunneling works.

2 cl; 3 dwg

FIELD: mining industry, particularly for supporting stall roofs.

SUBSTANCE: method involves drilling boreholes in roof and extending boreholes to perform breaking; pouring fixing mix into boreholes; loading explosive charges and blasting thereof, wherein anchor is introduced in bottomhole section and wooden self-loosened plug is placed between explosive charge and the anchor.

EFFECT: increased supporting reliability and operating safety.

4 dwg

FIELD: mining industry, particularly for mine tunnel anchoring with steel-and-polymeric anchors.

SUBSTANCE: method involves drilling boreholes; inserting at least one ampoule into the borehole; driving assembled anchor into the borehole, wherein anchor includes rod, fastening nut, support ring, support and spherical washers; rotating anchor up to ampoule breaking; mixing chemical components: tightening the nut after polymerization finishing; turning fastening nut against stop by drilling rig torque applied through fitting; continuing rod rotation so that rod passes beyond the fastening nut screwed on threaded rod tail of the anchor and fixed against damage by ring installed on end of threaded rod tail. Borehole is drilled and anchor is driven with the use of the same mechanism, namely with left-handed telescopic rock drill.

EFFECT: reduced costs for anchor production and installation.

1 dwg

FIELD: mining, particularly means for mine contour bolting.

SUBSTANCE: tightening device comprises clutch connected to rope in axial orifice by means of wedge-like bush. The bush comprises thread and nut located on outer surface thereof. Annular groove is formed in clutch end, which receives rope. Guiding means surrounding the rope is installed in the annular groove. Opposite clutch end has outer surface defining hexahedron.

EFFECT: increased flexural rigidity of cable part connected to clutch, simplified clutch structure and increased operational efficiency.

2 cl, 2 dwg

Mine lining method // 2283959

FIELD: mining, particularly to support and consolidate rock.

SUBSTANCE: method involves drilling injection and drain wells; connecting bolts with support members in well bottoms; applying isolation covering on mine surface after rock shifting; injecting binding composition into rock via the injection wells to create rock-and-concrete shell around the mine; maintaining maximal binding composition pressure in injection wells free of fluid losses for half and hour; applying load to bolts in rows in direction from excavation face. Bolts fastened with powder mineral filler without support washer installation may be used. During bolt fastening in drain wells the wells are filled with mineral filler for the full length thereof and well heads are supported with filtering material. During bolt fastening in injection wells the wells are filled with mineral filler for minimal height necessary for uniform bolt fastening. The height is selected so that upper level of mineral filler is outside stable massif contour.

EFFECT: increased efficiency of rock consolidation.

2 cl, 3 dwg

FIELD: mining, particularly methods to fill slope secured with roof bolting.

SUBSTANCE: method involves drilling-out massif area around each roof bolt to be removed. For massif area drilling-out runner rod and grilled lagging are taken away in roof bolt removal zone. Then guiding bush is screwed on rod end projected in mine and freed of fastening nut and support member so that the guiding bush is restricted from rotation. Drilling tool, namely drill-rod made of pipes with annular crown, is advanced along guiding bush side up to crown resting against rock. Then annular slot about rod to be removed is created for rock massif breaking along with core forming inside the pipes. After that rod is disintegrated from rock massif and core with rod is removed from annular slot under the action of external force. Rod is released from core rock by core rock breakage.

EFFECT: possibility to remove roof blots having different structures.

3 cl, 7 dwg

FIELD: mining, particularly mine lining with deep bolts.

SUBSTANCE: method involves drilling borehole; inserting necessary number of ampoules filled with chemical hardening mix in the borehole; inserting sharpened bolt end having length exceeding mine height in borehole and leaving another end in mine ground; locking bolt rod and support washer thereof with the use of sharpened metal bar having length equal to telescopic perforator advancing travel; moving the lock to borehole head by force applied thereto by telescopic perforator; repeating said movement operation to provide perforator connection with bolt head to rotate bolt for ampoule breaking and mixing; retaining bolt in borehole up to total mix polymerization. Borehole drilling and anchor installation are carried out with the use the same telescopic perforator.

EFFECT: increased reliability, decreased costs and time for bolt installation, simplified works due to possibility of integral bolt installation mechanization with the use of device for bolt forcing in borehole.

4 cl, 2 dwg

FIELD: building.

SUBSTANCE: invention concerns the method of manual installation of the anchor bolts extended by means of impact of pressure of environment, including manual connection of a pressure source to an anchor bolt needed to be extended. The method includes the following stages: start of sequence of operations by the operator at which an anchor bolt is impacted by pressure to preliminary set level, and provision of preliminary set pressure during preliminary set period of time. The guidance system for connection to a pressure source contains means for impact on an anchor bolt pressure of preliminary set level and means for provision of pressure during preliminary set period of time. The device for installation of an extended anchor bolt by means of pressure impact on it, contains a source of pressure and means for manual connection to an extended anchor bolt.

EFFECT: possibility of provision of pressure for anchor bolts for maintenance of corresponding quality of their installation.

16 cl, 3 dwg

FIELD: mining.

SUBSTANCE: invention relates to method and device for installation of anchor bolts. There is suggested the method and device whereat a tube bolt of closed section is installed into interior section of a well and where an extensible part of the bolt is extended to the contact with the interior section of the well to be anchored in it. A tie positioned in the exterior section of the well and having an interior part fastened to the tube bolt is subject to a preliminary tension. Then a channel is opened for passing of hardening medium for connecting of the tie with an outer space by means of applying pressure of a specified value. Hardening medium is pressed into the exterior section of the well between the tie and a wall of the well which facilitates hardening of the medium.

EFFECT: facilitating fast, rational, economic and safe installation of anchor bolt in strengthened rock.

19 cl, 6 dwg

Anchor bolt // 2343287

FIELD: mining.

SUBSTANCE: invention refers to drilling elements and anchor bolts used at mining works and tunneling. The drilling element has opposed the first and second ends and a rod passing between the ends. At least one drilling head is positioned on the first end. The second end is adjusted for connection to a drilling facility to ensure rotation of the drilling element and to transfer axial force onto it. Along and around the rod there is assembled a bushing while the passage formed between the bushing and the rod facilitates flowing of fluid medium along the rod. Also there is suggested the drilling bit, the method of drilling with a drilling element and the method of stabilisation of rock.

EFFECT: increased efficiency of process of rock bolting and reduced costs for drilling elements.

57 cl, 31 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining and can be implemented for entries fastening. The method consists in installation of wire coil on an anchor rod, in introducing the anchor into a bored blast hole and in impressing a turn of the wire coil into walls of the blast hole. The wire coil is assembled on the rod in a screwed groove cut in the rod. The diametre of the wire coil is bigger, than the diametre of the blast hole. The end of the wire coil introduced into the blast hole is secured on the anchor rod and is rotated in the direction wherein diametres of turns of the wire coil become less; after that, turns of the wire coil are pressed into the walls of the blast hole by elastic force of the wire coil. The device consists of the anchor rod, on the exterior surface of which the groove is cut. The wire coil is laid into the groove; the diametre of the wire coil exceeds the diametre of the blast hole. The end of the wire coil introduced into the blast hole is secured on the anchor rod. A head turned around with a wrench is assembled on the end of the anchor rod outgoing from the blast hole.

EFFECT: increased efficiency of the method due to reduced labour intensiveness at anchor installation and at operation, and also due to increased reliability of its cohesion with walls of the blast hole.

6 cl, 1 dwg

Up!