Reinforcement method of mine workings with anchor support
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.
The invention relates to mining, and in particular to methods of securing mining using anchor lining, mainly workings rectangular cross-sectional shape, enclosing rocks which are composed of unstable rock, prone to vyvaloobrazovanie.
A known method of construction of anchor supports, including drilling in the top of the range pair of inclined wells that intersect each other at the bottom, as well as drilling in the interval between the paired wells more inclined wells, forming two additional wells crossing in the middle part thereof, the installation of wells intersecting anchor rods, one of which is passed through the other and connect them at the intersection, and completing wells hardening material after installation of anchor rods .
The disadvantage of this method is that, although it provides for increasing the bearing capacity of anchor supports by providing its ravnopravnosti, however, due to the location of the pair of inclined and additional wells in the same plane with the possibility of crossing in the middle part thereof, that is, where rocks of the roof adjacent to the excavation contour heavily disturbed by the influence of the preparatory work, the possible deterioration of the clutch anchor rods with fixed breed that SN is measure the strength of their fixing and therefore can be provided with high quality anchoring output.
At the same time, it should be noted that because as a reinforcing anchor rods used the ropes cross-strand, because of the ability of the rope to stretching over time and in relation with the trend of the displacements of rocks inside develop under the influence of rock pressure, the tension of the rope is gradually reduced, resulting in reduced stability of the rocks on the path of development and thus to reduce the reliability of its secure and maintain in operation.
In addition, this method requires high precision drilling more inclined wells to allow their intersection with a pair of inclined wells, as in the case of deviation of the borehole from the given direction is impossible to install them in the anchor rods. In this regard, it is required to perform work on perburuan more inclined wells, which complicates the mounting technology of production.
Outlined the disadvantages of this method lead to the inefficiency of securing mining.
Closest to the claimed invention to the technical essence and the achieved result is a way of fixing preparatory workings anchor shoring, mainly workings rectangular cross-sectional shape, including drilling in the process of conducting expressed ODI number of deviated boreholes and installation of anchors with grabs. The development is supported grabs that aneroussa separate groups of anchors, tilted towards the mouth of the production and in the direction of the preparatory slaughter. Moreover, in each group of grabs is catching up with the anchors, sloping on Board generation .
The disadvantage of this method is that due to the installation of inclined anchors in two grabs each group only in the roof framing at her sides and keep the average developing grabs without anchors not exclude the possibility of bias broken from sinking develop breeds inside of a development, because it is not provided by the strengthening of these rocks anchors along the section of the output.
In turn, the installation of the anchors in the third pickup with tilt on Board the production, leads to the fact that the rocks of the roof within the cross-section generation are also loose and are only grabs. In the result, under the influence of rock pressure is the deflection of the pick-up and consequently the deflection of the rock layer in the middle of production, thereby promoting the process of separation and fracturing of rocks of the roof, which can lead to the fall of rocks inside output.
It follows that adopted by the density of the anchors in each group grabs is not possible to form a load-bearing layer of rock in which rule generation, and because this method is not provided by the hardening of the boards develop within the border zone of possible collapse of the rocks, so it is not possible to provide reliable strengthening of rocks around the output.
In addition, the implementation of the known method is carried out within the group separate stages, i.e. in the process of drilling a first generation anchored the first pickup, then again traversed to develop and anchored the second pickup and then similarly anchored the third pickup. This step-by-step strained grabs cannot be considered rational because it can cause uneven formation of the load on the anchor within each group, which significantly reduces the efficiency of support functions anchor lining, thus failing to carry out the fixing of output.
From the above it follows that there is a method adopted for the prototype, is not efficient enough when attaching mining, since it does not resolve the issue of strengthening the rock anchors on the contour generation, especially in the middle part of its cross-section, where the most intensive process of separation of the roof rock, which is confirmed, according to theory of mining geomechanics, plot area possible collapse of the rocks.
The problem solved by the claimed invention is the improvement of effectiveness of securing mining by providing the possibility of a reliable and high-quality fastening openings, due to the formation area of the fortified rock excavation contour within the border zone of possible collapse of the rocks.
The technical result, which provides a solution to the problem, is the development of load-bearing arch around a working and, therefore, the sustainable state of the fortified rock excavation contour for the entire period of its operation.
To achieve these objectives with the claimed technical result in the way of securing mining anchor shoring, mainly workings rectangular cross-sectional shape, including drilling in the roof framing in the process of its implementation of inclined boreholes and installation of anchors with a slope towards the bottom output and to the side of her mouth, and anchors with a slope on the side of generation, according to the present invention simultaneously with the drilling of inclined holes in the roof framing are drilling angled holes in Board production, and the blast holes for anchor drill into the roof and sides produce a given grid strained rocks, according to which the installation referred to in the holes inclined anchors perform rows, each anchor, tilted towards the bottom output, and anchor, tilted towards the mouth of the production, set in the holes in alternate order with observed is the group conditions of their arrangement in staggered with respect to each other in adjacent rows, that provides orientation of these inclined anchors toward each other between adjacent rows along the contour generation, forming together with the anchors, tilted to the side framing, fortified zone rocks from the excavation contour within the border zone of possible collapse of the rock, with the drilling of deviated boreholes and installation of anchors in each row along the contour generation exercise after podvigina slaughter on the length of the technological waste held by production, and anchor, tilted towards the bottom output and its mouth, set in the holes at an angle to the longitudinal axis of the production equal to 65-70°, with the possibility of spatial intersection between the rows strengthened by the anchors of rocks on the circuit output.
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 found the source, which is characterized by signs, identical features of the invention set forth in the claims.
Therefore, the claimed invention meets the criteria of the invention of "novelty."
The causal link between the claimed set of essential PR the characters and achievable technical result is the following.
Sign - "simultaneously with the drilling of inclined holes in the roof framing are drilling angled holes in Board production, and the blast holes for anchor drill into the roof and sides produce a given grid strained rocks, according to which the installation in boreholes mentioned inclined anchors carry out a series of" - is new and clarifies that the grid is strained performed in separate rows, each of which sets of inclined anchor with different spatial orientation relative to each other along the contour generation. Such a scheme setting anchors predetermines the possibility of forming a bearing zone of the reinforced anchors rock excavation contour without gaps unfortified areas of rock in the roof and sides produce that cannot be achieved in the prototype , which provides for the strengthening of roof rocks only at the sides of the excavation.
Sign - "...each of which (in each row) anchor, tilted towards the bottom output, and anchor, tilted towards the mouth of the production, set in holes in an alternating compliance with the terms of their arrangement in staggered with respect to each other in adjacent rows that provides orientation of these inclined anchors toward each other between adjacent rows along the contour generation, forming together with the anchors, tilted is passed on Board the production, the fortified area of rocks along the contour generation within the border zone of possible collapse of the rocks" - is a fundamental and together with the above sign regulates the installation of inclined anchors contour generation, namely alternating in each row of mandatory compliance with the terms of their arrangement in staggered relation to each other in adjacent rows.
From this it follows that the inventive method provides for high density installation of anchors, compared with the prototype , with the formation around them rock blocks and due to their mutual influence through lateral thrust between them is the effect of volumetric coverage strengthening inclined anchors rocks from the excavation contour. This results in the load-carrying code around a working, sustainable state of rocks along the contour generation within the zone boundaries of the possible collapse of the rocks, which significantly affects the reliability of fastening of output.
A sign - "the drilling of deviated boreholes and installation of anchors in each row along the contour generation exercise after podvigina slaughter on the length of the technological waste held by production" - in conjunction with the above characteristic necessary for the implementation of the proposed method, PQS is LCU allows all inclined anchors carry load after installation, resulting in a uniform distribution on these anchor excavation contour after podvigina slaughter, thereby increasing the efficiency of support functions anchor supports and accordingly qualitative consolidation of production.
In turn, in the prototype  one cycle of holding and fastening produce consistently perform in three stages with different orientation of the anchors at each of these stages. This prevents the anchors of each stage to engage in a joint work simultaneously, which reduces the effectiveness of anchoring mining.
Sign - "and anchor, tilted towards the bottom output and her mouth set in each row at an angle to the longitudinal axis of the production equal to 65-70°, with the possibility of a spatial intersection between adjacent rows of reinforcing anchors rocks along the contour generation" - regulates the setting of inclined anchors in rocks, which provides a counter-orientation sloping roof anchors between adjacent rows with the spatial crossing in the upper zone of the possible collapse of the breeds that are less prone to influence the conduct of the tunnel works.
As a result, improves the conditions of coupling anchors with a fixed breed, thereby increasing stre is here anymore. This effect could not be achieved in the prototype , because it has a spatial intersection of inclined anchors between adjacent grabs occurs in the lower layers of the zone of possible collapse of the rocks, more disturbed from the effects of tunneling works.
In turn, trade orientation of the anchors installed in the sides of the excavations, prevents delamination of the wall rock along the lines of slip, which is the border of the zone of possible collapse of the rocks, since the spatial intersection mentioned anchors is outside a specified area.
From the above it follows that this feature makes it possible to provide a stable condition fortified rock excavation contour.
Thus, the set of essential features that characterize the essence of the invention, will provide reliable and high-quality fastening openings due to the formation of the fortified zone rocks from the excavation contour within the border zone of possible collapse of the rocks.
All these technical effects will allow you to solve the problem is to increase the efficiency of securing mining and accordingly to create safe working conditions in mines, rocks which are composed of unstable rock, prone to vyvaloobrazovanie.
From the above the following is the duty to regulate, what are 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".
Industrial applicability of the claimed invention is substantiated following description and drawings.
The essence of the proposed method is illustrated by drawings, where:
- figure 1 shows a diagram of the mounting of excavation, according to which the slanting anchor installed in a row along the path of development and potential areas of rock collapse (solid lines shows the anchor, tilted to the side framing, and the projection of the anchors, tilted towards the bottom output, and the dotted lines are the projection of the anchors, tilted towards the mouth of the production), the cross section;
- figure 2 is a view along arrow a in figure 1, the technological scheme of inclined anchors in series relative to the bottom output and its estuary, type in the plan;
- figure 3 is a section along B-B of figure 2, the inclined position of the anchors relative to each other in series in the roof and the sides along the tunnel (the arrow shows the direction of the conducting output), vertical section;
- figure 4 is a fragment of a longitudinal section of the mountain vyrabotki is with 3, rock the blocks around the sloping roof anchors (anchor tilted to the side framing conventionally not shown);
- figure 5 is a part cross-section of excavation with figure 1 (projection of rock blocks around inclined anchors);
- figure 6 is a plot of excavation rectangular cross-sectional shape and the grid is strained rocks via the described method (anchor not conventionally shown in the left side of generation relative to the drawing), in a perspective view.
Mounting method of excavation anchor support is considered in relation to a rectangular cross-sectional shape generation and is as follows.
According to the claimed method as the excavation 1 after podvigina slaughter 2 (figure 3 by the arrow b shows the direction of carrying out production 1) by the length L of technological waste held by production 1 in the roof and the sides (flanks) of the Buryat one row of inclined holes 3 in the vicinity of the bottom 2 on the given grid strained rocks.
While the physical basis for the formation of a given mesh strained rocks is that because of the formation during drilling generation of disturbed areas adjacent to the path of development and with increased fracture with the possibility of wood thrown in between installed the anchors is, there is a need to install in the holes 3 slanted anchor 4 and 5 so as to provide increased lateral thrust between rock units formed around each inclined anchor after it is installed, and therefore to resist displacement of the broken rocks in the section of the output.
This can be achieved by the claimed method due to the adopted mesh strained rocks, according to which drilled in the bottom 2 in one row of inclined boreholes 3 anchor 4 is installed with a slope to the side of the face 2 generation 1, anchor 5 sets with incline towards the mouth of generation 1, and the anchor 6 sets with incline on the side of generation 1. The anchors 4, 5 and 6 are fixed grabs 7 (figure 1).
Moreover, the aforementioned inclined anchor 4 and 5 are placed in the holes 3 in alternate order in the same row at the bottom 2 generation 1 in compliance with the conditions of the location anchors 4 of the above-mentioned series of staggered relative to the anchors 5 adjacent rows, then accordingly anchor 5 adjacent rows are staggered relative to the anchors 4 of the above-mentioned range.
In the future, after podvigina bottom 2 on each regular length L of technological waste held by production 1 repeat the procedure for drilling bore-holes 3 and installation of anchors 4, 5 and 6 in one row along the contour generation 1 (2 and 3).
Because when atoi grid strained rocks the possibility of orientation towards each other inclined anchors 4 and 5 between adjacent rows along the contour generation 1, facilitate spatial intersection of these anchors 4 and 5 between adjacent rows, resulting in the manifestation of the effect of volumetric coverage strengthening inclined anchor 4, 5 and 6 of rocks on each of the mentioned length "L" along the contour generation 1. This effect is achieved due to the manifestation of the forces of adhesion anchors 4, 5 and 6 with the broken rocks on the contour generation 1, providing due to this increased lateral thrust between rock blocks 8, 9 and 10 formed around the anchors 4, 5 and 6 respectively, which prevents the displacement of the broken rocks in the generation section along its entire length (figure 4 and 5).
Figure 6 illustrated in accordance with figure 2 and 3, the circuit arrangement of anchors 4, 5 and 6 in each row along the contour generation 1 with the orientation of the anchors 4 and 5 towards each other between adjacent rows.
Thus, the execution of the specified set of operations on the installation in each row of inclined anchors 4 and 5 with their orientation towards relative to each other between adjacent rows and anchors 6, tilted to the side framing 1, allows forming zone 11 fortified rocks from the excavation contour 1 is within the boundaries of the zone 12 possible collapse of the rocks. Moreover, the resulting mentioned area 11, performing the function of load-bearing arch around in the processing 1, provides stable condition fortified rocks around the perimeter of generation 1. This ensures reliable fixing of excavation 1 in the process of its implementation.
In addition, when implementing the proposed method slanted anchor 4, 5 and 6 take the load immediately after they are installed and operate in the uniform distribution of the load on them by contour generation, because they are set in one row after podvigina bottom 2 at the above-mentioned length L, thereby increasing the efficiency of support functions anchor supports and providing due to this qualitative consolidation of production, allowing you to save your project generation section 1 for the entire period of its operation.
Moreover, the slanted anchor 4 and 5 installed in each row at an angle α to the longitudinal axis of the production equal to 65-70°, thereby providing the possibility of spatial intersection of roof anchors 4 and 5, between adjacent rows in the upper zone 12 of a possible collapse of the rock in which the rock is less disturbed from the effects of the process of generation 1. This, in turn, improves grip anchors 4 and 5 with dockable breed and, therefore, increase the strength of their fixing, which does not allow to form the deflection of the fixed rocks in the upper layers of the specified zone 12, thereby preventing developed the e process of splitting and fracturing in the lower pinned layers of rocks in the roof and the sides of the framing 1.
Moreover, the spatial intersection of anchors 4 and 5 installed in the sides of the generation 1, is located outside the zone 12 of a possible collapse of the rocks, which significantly affects the strength of their fixing and eliminates the possibility of detachment of rocks in the sides of the framing 1.
Thus, the use of the proposed method will provide reliable and qualitative consolidation of mining due to the effect of volumetric coverage strengthening anchors rocks from the excavation contour within the zone of possible collapse of the rocks.
Sources of information
1. USSR author's certificate No. 1286784, CL 21D 20/00, 1985
2. The patent of Russian Federation №2368786, CL 21D 20/00, 2008 (prototype).
The method of securing mining anchor shoring, mainly workings rectangular cross-sectional shape, including drilling in the roof framing in the process of its implementation of inclined boreholes and installation of anchors with a slope towards the bottom output and to the side of her mouth, and anchors with a slope on the side of generation, characterized in that simultaneously with the drilling of inclined holes in the roof framing are drilling angled holes in Board production, and the blast holes for anchor drill into the roof and sides produce a given grid strained rocks, according to which the installation in boreholes mentioned inclined is Kerov carry out a series each anchor, tilted towards the bottom output, and anchor, tilted towards the mouth of the production, set in holes in an alternating compliance with the terms of their arrangement in staggered with respect to each other in adjacent rows that provides orientation of these inclined anchors toward each other between adjacent rows along the contour generation, forming together with the anchors, tilted to the side framing, fortified zone rocks from the excavation contour within the border zone of possible collapse of the rock, with the drilling of deviated boreholes and installation of anchors in each row along the contour develop exercise after podvigina slaughter on the length of the technological waste held by production, and anchor, tilted towards the bottom output and her mouth set in each row at an angle to the longitudinal axis of the production equal to 65-70°, with the possibility of a spatial intersection between adjacent rows of reinforcing anchors rocks from the excavation contour.
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
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
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
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.
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
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
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
SUBSTANCE: invention refers to mining, namely to method of anchors installation. Drill-rod with inner passage is put into rock. Through inner passage fluid self-consolidating mass is charged and thus ready borehole is filled with mass, so that mass consolidates in borehole with drill-rod remaining in borehole. Consolidating mass is a combination of consolidating plastics and plastics inducing consolidation. Mentioned plastics are supplied to inner passage of drill-rod during predetermined time of supply F which corresponds to time of consolidation H. Time of consolidation is predetermined by means of choice of plastics and ratio of their combination in such a way that time of supply actually corresponds to time of consolidation and actually results in complete filling of working area by consolidating combination between point of mixture and borehole outlet.
EFFECT: providing of automatic filling of borehole by consolidating mass along its whole length, reduction of time required for mass consolidation, improving of safety of mining operations.
19 cl, 4 dwg
SUBSTANCE: method includes drilling of boreholes in rows, installation into it compound anchor-grabs, pressure of grabs to surface of opening. Coupling of anchor-grabs to each other is implemented by means of angle bar with openings, implemented in its shelves, in one of which it is passed end of grab of anchor of previous row and grab is strained by means of female screw, and through the other it is installed into borehole anchor of following row. Coupling of anchors to each other in rows is implemented by grabs by means of two screws, one of which is fixed the end of grab through staple in it to anchor of previous row and it is pressed grab to surface of excavation. Tension of grabs in rows of installed anchors in cross-section of excavation is implemented separately by roofing and sides, successively stretching grabs by roofing in the direction from one angle of excavation to other, and in sides of excavation in the direction from roofing to soil.
EFFECT: effectiveness increase of excavations fixation and simplification of fastening process.
4 cl, 6 dwg
SUBSTANCE: invention relates to mineral resource industry and can be used at fastening of development drifts by bolting. For this drift is supported by grab made of special profile, which are bolted in separate groups, consisting of anchors, inclined to the side of mouth of working and development face, additionally into this group it is introduced grab with anchors, inclined to the side of drift.
EFFECT: qualitative fastening of development drifts, creation of safe working conditions, cost cutting for fastening of drifts.
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.
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.
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
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
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
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
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
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