Method to support mines

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

 

The invention relates to the mining industry, and more specifically to methods of maintaining the underground mine workings in terms of the impact of sewage treatment works with save for reuse when bezzalogovyh the schemes of coal seams.

There is a method of maintaining a mining stored for re-use, including placement along a conveyor generate frames under constant arch supports, supports strengthening behind stope on the border with mined-out space in the zone of active displacements of rocks, consisting of two supporting elements, for example, from two racks (friction or props)installed on the same ground at different angles of inclination to the horizon. In turn, one of the supporting elements is installed vertically at the bottom, and the direction change of the resistance forces lining amplification is performed by changing the deflection of the other of the support element from the vertical towards the goaf, which (deviation) increase along the production from slaughter until the stabilizing zone rock movement as the seal collapsed rocks. And while doing cleaning work both the support element supports building set in the frame of the arch support ahead of the stope in the zone of influence of the reference pressure of the bottom (1).

Defects in the rigid-known method is the fact, although he foresees the strengthening supports the generation ahead of the stope, however, continued intensively process of increasing displacement of the roof rock production due to the fact that under the action of forces of rock pressure increases stress state of the rock mass, by comparison with a busy untouched state of the array after carrying out production. In this regard, intensified the process of deformation and fracture of rocks of the roof framing, not thereby counteracting forces of rock pressure and consequently worsening the conditions for maintaining production, save for reuse.

Another drawback of this method is that, since after the execution of each cycle for the extraction of coal produced within the zone of active displacements of rocks reinstalling racks lining the gain to change the angle of deviation from the vertical, this leads to a reduction of the bearing capacity not only supports strengthening, but the main lining of manufacture not thus providing the opportunity to bring the roof framing to the steady state. Resulting in a worsening in the terms of confrontation developing process of fracturing in the rock roof framing in the zone of influence of a goaf for clearing face that affects the health of the lining develop in the Asti save its normative and operational parameters, i.e. the width and height of output. It follows that the way to maintain production, stored for reuse when bestolkovoy scheme of mining coal seams, ineffective.

Known mounting method of excavation, increasing the anchor supports to maintain production in the zone of influence of the treatment works. According to this method produces reinforcement lining, previously formed by the excavation of the anchors of the first stage with loops at the ends of the shanks, by setting a longer anchor the second line, installed in holes drilled in the roof and sides produce staggered in relation to the anchors of the first stage. And to the shank of the anchors of the first stage of suspended metal grid, and press it to the surface framing anchors of the second stage (2).

A significant disadvantage of this method is that, because the holes under the long anchors of the second stage of the Buryats in the zone of influence of the treatment works, when the rocks of the roof framing has been destroyed (especially in the zone of maximum bearing pressure), in this case, in varying degrees, can be broken wall of bore-holes (or interspersed collapsed rocks or some parts of the borehole can be removed), and so to enter long anchors the second queue depth does not depict assetsa possible especially in unstable rocks of the roof framing. It follows that the application of this method could not effectively influence the steady state of the roof framing in the mentioned area.

Another disadvantage of this method is that, even if the walls of the holes will not be disturbed and long anchors of the second stage will provide podszywania" layers of the roof framing to a more sustainable its layers, however, the factors causing the collapse of the roof is preserved due to the fact that in the zone of influence of the treatment works, the process of destruction of the roof rocks accompanied by the development of cracks in the form of a split perpendicular to the unconformity, and so long anchors of the second stage are not able to slow down this process, which eventually may lead to the collapse of the roof framing because of the loss of its stability.

That is, this method does not allow to achieve this goal is to increase the sustainability of production, and hence to keep the production in operational condition.

Also used in this way stalepolimernyh anchors due to their embodiment are installed in boreholes without pre-tension, not ensuring a reliable contact with the host rocks, which contributes to the development of the process of crack formation in conditions of high mountain pressur is I, as a result, loss of bearing capacity and stability of the output.

It should be noted as a drawback that the metal lattice pressed against the surface of the elaboration of the second phase, however, this pressing is performed in the zone of influence of sewage treatment works in the stratification of rocks along the contour generation, and not the initial stage of its development that contributes to the formation of wood thrown, it means that this factor has a negative impact on the condition of maintaining production, especially production, reusable behind stope.

In addition, this method has a fairly complex technology installation of the anchors of the second stage, including a large number of time-consuming operations for the drilling of boreholes, installation of anchors and their fixation with time to execute them, and this significantly reduces the effectiveness of work to maintain output.

Thus, the above-mentioned disadvantages of the known method (2) reduce the effectiveness of maintaining a working under the influence of the treatment works. Therefore stated was the precondition for the establishment of the claimed invention.

The basis of the invention is tasked to improve the effectiveness of maintenance at the expense of increasing the stability of the roof rocks working under the influence of wastewater treatment works, due to the early hardening stratified rocks to the owly generation before it reaches under the influence of intense reference pressure.

The technical result, which provides a solution to the problem expressed in conservation framing in operational condition for reuse behind stope.

To achieve these objectives with the claimed technical result in the way of maintaining mining, mainly mine workings save for re-use when mining coal seams long poles, which produce the gain set at penetration in the roof framing short anchors of the first stage by installing additional longer anchors the second stage with their staggered in relation to short anchors of the first line and in the plane of the cross section generation, according to the present invention as additional long anchors of the second stage uses hollow anchors with a spiral wrapped on their exterior surfaces, and installation of the anchors of the second stage carry out develop along separate areas the length of each of which are corresponding to the length of the end part of the zone reference pressure stope, 0,3l, where l is the length of the zone of support pressure stope, the conditions of maintenance of mine workings provide in the following order: first on another site generation is ustanavlivaut mentioned anchors simultaneously with podvigina stope ahead of this stope 1.3 length of his zone reference pressure, to whom is the site of generation length, 0,3l, with the previously installed anchors of the second stage ahead of the zone of support pressure, and then as podvigina stope, once the site of generation with the previously installed anchors of the second stage, which was ahead of the zone of support pressure gradually falls under the influence of a finite part of the zone reference pressure to produce a gradual hardening of delaminated on this part of the roof rock by forcing them fixing solution through the hollow anchors of the second stage, creating in the roof framing zone hardening, helps to slow down the process of cracking bundles in the thickness of the rocks of the roof framing, this as the completion of the hardening of the roof rocks at the site of generation, which was under the influence of a finite part of the zone reference pressure, to re-establish the anchors of the second stage at the next ordinary plot develop subject mentioned ahead of stope and produce hardening stratified rocks of the roof at the previous regular site generation with installed anchors of the second stage after falling under the influence of a finite part of the zone reference pressure stope, in the future, as podvigina stope continue in the described order you Almaty installation of the anchors of the second stage ahead of the zone of support pressure and hardening stratified rocks of the roof framing in the period of effect of a finite part of the zone bearing pressure on these and related these operations are plots of output.

Moreover, to allow hardening of the stratified rocks of the roof to a height of arch collapse framing anchors of the second stage set to a depth of not less than the width of the supported output.

Conducted by the applicant's analysis of the prior art, including searching by the patent and scientific and technical sources, has allowed to establish that the applicant is not detected similar, characterized by signs, identical to all the essential features of the claimed invention set forth in the claims.

Therefore, the claimed technical solution meets the conditions of patentability of an invention is "new".

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

Sign - "as long anchors of the second stage uses hollow anchors with a spiral wrapped on their exterior surfaces" - indicates what design you should use the anchors of the second stage for the implementation of the proposed method to perform the drilling, installation and fastening of the anchor at one time, thereby eliminating a phased implementation of operations related to drilling of boreholes, installation of anchors and their fixation, which takes place in the prototype (2). It follows that this is the overrun bit contributes to the simplification of the installation of the anchors of the second phase with a simultaneous reduction in comparison with the prototype (2) material and labor resources in part of the cost of maintaining output.

Sign - "and the installation of the anchors of the second stage carry out develop along separate areas, the length of each of which are corresponding to the length of the end part of the zone reference pressure stope, 0,3l, where l is the length of the zone of support pressure stope" is new and describes the procedure for installation of the anchors of the second stage along the production, namely separate areas, regulating the length of each of them adopted equal to the length of the end part of the zone reference pressure, because it is characteristic of the initial stage of the stratification of the rocks of the roof framing, and so the breed is subject to hardening at this stage. This condition selection section length installation of anchors guaranteed anticipates the possibility in the future not to develop an active process of separation of roof rocks at each site develop in the zone of influence of the treatment works.

A sign - "the conditions of maintenance of mine workings provide in the following order: first on another site production install these anchors simultaneously with podvigina stope ahead of this stope 1.3 length of his zone reference pressure, in front of which is the site of generation length, 0,3l, with the previously installed anchors of the second stage ahead of the zone of support pressure" - t is aetsa fundamental and regulates the optimal length of the lead site production, which set the anchors of the second stage, i.e. to approach the final part of the zone of support pressure. Thus, according to the sign of the anchors installed in less disturbed rocks of the roof framing, and they are not affected zone reference pressure stope. In addition, thanks to the order of installation of anchors the possibility of skipping in the development of sites with unknown anchors, preventing thereby the formation of the roof framing sections with stratified rocks, and consequently reduce the level of sustainability of production.

Sign - "and then as podvigina stope, once the site of generation with the previously installed anchors of the second stage, which was ahead of the zone of support pressure gradually falls under the influence of a finite part of the zone reference pressure to produce a gradual hardening of delaminated on this part of the roof rock by forcing them fixing solution through the hollow anchors of the second stage, creating in the roof framing zone hardening, helps to slow down the process of cracking bundles in the thickness of the roof rock generation" - in conjunction with the above sign is key and contributes to a gradual strengthening of roof rocks in the initial stage of their bundles on a given at the ASDE develop as falling under the influence of a finite part of the zone reference pressure, thus forming a zone of hardening in the roof framing. That is, the usefulness of this characteristic is obvious, because in advance allow hardening of the stratified rocks of the roof before entering this area develop in an area of intense reference pressure stope. Thus, the hardening stratified rocks of the roof through the use of the anchors of the second level is the main technical tool that does not allow the development of disturbed rocks of the roof, thereby improving the sustainability of production and accordingly improving the conditions of its maintenance during the period of re-use for clearing face.

Sign - "upon completion of the hardening of the roof rocks at the site of generation, which was under the influence of a finite part of the zone reference pressure, to re-establish the anchors of the second stage at the next ordinary plot develop subject mentioned ahead of stope and produce hardening stratified rocks of the roof at the previous regular site generation with installed anchors of the second stage after falling under the influence of a finite part of the zone reference pressure stope" - specifies the technological operations of the claimed method, namely the installation of the anchors of the second is charedi carried out at the site of generation, following the plot develop with the previously installed anchors and at the moment when the work on strengthening of roof rocks completed at the site of generation, which was under the influence of a finite part of the zone reference pressure, which, in turn, then goes into a stabilizing zone of rock pressure. That is, this feature eliminates the possibility of formation of non-reinforced sections in the roof framing, thereby ensuring quality padding rock arch collapse of production, which positively affects the conditions of maintaining output.

Sign - "in the future, as podvigina stope continue in the order described below to perform the installation of the anchors of the second stage ahead of the zone of support pressure and hardening stratified rocks of the roof framing in the period of effect of a finite part of the zone bearing pressure on these and related transactions the areas of production," explains the stages of execution of work on the strengthening of the anchors of the first stage by means of the anchors of the second stage and early hardening of the rock roof framing before getting it under the influence of intense reference pressure, i.e. the characteristic required for execution of the claimed invention.

Sign (2 formulas) - "to allow hardening of the stratified rocks of the roof on high is the arch collapse framing anchors of the second stage set to a depth of not less than the width of the supported production" - regulates the depth of the anchors of the second stage, thereby ensuring the penetration of the fixing solution in broken layers of rocks at the height of the arch collapse of output. This, in turn, promotes the formation of monolithic reinforced rock mass, thus preventing the development process of separation of roof rock production in the zone of influence of the treatment works and therefore reducing the load on bolting output.

Thus, the set of essential features that characterize the essence of the invention, allows to ensure the sustainability of the roof rocks working under the influence of the sewage treatment works due to the early hardening of the stratified rocks of the roof framing.

All these technical effects allow you to solve the problem is to increase the efficiency of maintaining production and, accordingly, to keep it in operating condition for reuse behind stope.

From the above it follows that the essential features of the claimed invention are in causal relationship with achievable technical result and the prior art in this area is not clear to the specialist that characterizes the "inventive step" of the invention.

Industrial application Appl is imago of the invention is substantiated following description of the invention and the drawings.

The essence of the proposed method is illustrated by drawings, where:

- figure 1 is a flow diagram of maintaining generation for the proposed method (solid and dashed curves shows the zones of the reference pressure in the cross section along the strike of the formation), type in the plan;

- figure 2 - a section a-a figure 1, the same as in figure 1, a longitudinal section;

- figure 3 is a section along B-B figure 1 (generation, fixed short anchors of the first stage to enhance their long anchors of the second stage), the cross-section;

- 4 - section In figure 1 (generation, the anchors of the first stage which reinforced anchors the second queue outside the influence of the reference pressure), the cross-section;

- figure 5 is a section along G-g of figure 1 (development within the impact zone of support pressure, stratified rocks which hardened on the proposed method, the cross-section.

Way to keep mine stored for reuse during the mining of coal seams long poles, as follows.

Excavation 1, which is one of the contour extraction column 2 workings, while holding fixed short anchors 3 of the first stage. When mining a coal seam clearing face 4 to reduce the extent of displacement of the roof rocks of generation 1 in the zone of influence of the treatment works to reinforce the anchors lane 3 is the first stage by installing additional long anchors 5 of the second stage to approach the area bearing pressure (plot 6) stope 4. This anchors the 5 second queue set along the generation 1 separate sections in a staggered manner in relation to the anchors 3 of the first stage and in the plane of the cross section generation 1 (Fig.1-3).

And as long anchors 5 of the second stage uses hollow anchors with a spiral wrapped on their exterior surfaces, because they combine the simultaneous execution of drilling operations for rock solid installation of anchors in rock mass and retention therein, thereby providing the most rapid installation of anchors 5 of the second stage compared to the prototype (2) and respectively defining in advance the possibility of bond broken in the process of penetration of the rock roof framing before the approach zone of the reference pressure.

The length of each plot generation 1 take the appropriate length of the end part 7 zone reference pressure (plot 6) stope 4, 0,3l, where l is the length of the zone of support pressure stope 4.

Such regulations select the specified length of the plot develop, 0,3l, in its physical sense means that when the next plot generation 1 will be under the influence of the end part 7 zone reference pressure (plot 6), there is a bundle of roof rocks in this area develop in the early stage of its development.

In addition, the presence of the initial stage of rassloeniyami roof in the period of influence of the end part 7 zone reference pressure is confirmed by the practice of doing work on the strengthening of roof rocks in the active workings of the mine of OJSC "Vorkutaugol" and which is set on a slight the number of "failures" drilling tool for drilling holes in rocks of the roof framing on its length, equal to 0,3l. At the same time when drilling holes in rocks of the roof framing, under the influence of intense reference pressure, there is a significant number of "failures" of the drilling tool in the borehole.

That is, the installation of the anchors 5 of the second stage in the excavation roof outside the influence of the sewage treatment works of individual plots is one of the factors influencing the provision of conditions for the maintenance of generation 1 in the zone of influence of the treatment works.

In turn, the conditions for maintaining mining 1 for re-use provide as follows.

Let us consider the order of operations of creating conditions for the maintenance of generation 1 in a situation where as podvigina stope 4 ahead of him in the zone of influence of this stope 4 (plot 6) is supported by the floor 1 of length l corresponding to the length of this zone, and completed work on the installation of the anchors 5 of the second stage and strengthening of the stratified rocks of the roof framing 1 in each period the impact of the end of the 7 zones of the reference pressure (1 and 5).

As shown in figure 1, during the excavation of coal ahead of the stope 4 outside the influence of the reference pressure (plot 6) in the next section II expressed ODI 1 length 0,3l install anchors 5 second queue ahead of this stope 4 1.3 length of his zone reference pressure. And before section II generation 1 from the side of the stope 4 is a section I of this generation 1 length 0,3l with the previously installed anchors 5 of the second stage ahead of the zone of support pressure (figure 4).

Then, as podvigina stope 4 as soon as the site I develop 1 with the previously installed anchors 5 of the second stage, which was ahead of the zone of support pressure gradually falls under the influence of the end part 7' zone reference pressure (plot 6') as its distribution relative to the plot I at length 0,3l, produce gradual hardening of delaminated on this site I rock the roof framing 1 by forcing them fixing solution through the long hollow anchors 5 second queue.

As the end of the gradual hardening of rocks at the site I in the roof framing 1 a zone of hardening 8, which may help slow the process of cracking bundles in the thickness of the roof rock generation 1 started on this site I under the influence of the end part 7' zone reference pressure (plot 6').

Further, as the completion of the hardening of the roof rocks at site I, being under the influence of the end part 7' zone reference pressure (plot 6'), to re-establish the anchors 5 second turn at the next ordinary section III generation 1 subject to the conditions ahead of this part III clean the aqueous bottom 4, equal to 1,3l.

After that, as podvigina stope 4, as soon as the previous ordinary section II generation 1 gradually falls under the influence of the end part 7 of the" zone of support pressure (plot 6"), produce hardening of delaminated on this part II of the rock roof framing 1.

Further as podvigina stope 4 continue in the order described below to perform the installation of the anchors 5 of the second stage for each subsequent plot generation ahead of the stope 4, is equal to 1,3l, and strengthening of the stratified rocks of the roof at the site of generation, influenced the final part of the zone reference pressure stope 4.

To allow hardening of the stratified rocks of the roof in the period of effect of a finite part of the zone reference pressure at height h arch collapse 9 generation 1 anchors 5 of the second stage set to a depth "b", which in size is not less than the width "a" is supported generation 1 (figure 5).

While maintaining production 1 advanced control its geometrical parameters as hardening of the stratified rocks of the roof. What first measure the width and height of production 1 ahead of the stope at the place of installation of the anchors 5 of the second stage, and then in the zone of support pressure and behind it in the previously marked location measurement ecigarettes. Then by comparison of the values of these parameters determine the degree of displacement of the roof rocks of development and accordingly the resistance of the rocks and in case necessary, make operational adjustments hardening of the roof rocks.

Thus, using the proposed method of support of excavation will improve the efficiency of maintenance by increasing the stability of the roof rocks working under the influence of wastewater treatment works, due to the early hardening stratified rocks of the roof framing to it falling under the influence of intense reference pressure, i.e. to solve the problem.

Sources of information:

1. USSR author's certificate No. 1382965, CL 21D 11/14, 1986

2. USSR author's certificate No. 1652592, CL 21D 20/00, 1989 (prototype).

1. Way to keep mining, mainly mine workings save for re-use when mining coal seams long poles, which produce the gain set at penetration in the roof framing short anchors of the first stage by installing additional longer anchors the second stage with their staggered in relation to short anchors of the first line and in the plane of the cross-section generation, from which causesa fact, as additional long anchors of the second stage uses a hollow anchor with a spiral wrapped on their exterior surfaces, and installation of the anchors of the second stage carry out develop along separate areas, the length of each of which are corresponding to the length of the end part of the zone reference pressure stope, 0,3l, where l is the length of the zone of support pressure stope, the conditions of maintenance of mine workings provide in the following order: first on another site production install these anchors simultaneously with podvigina stope ahead of this stope 1.3 length of his zone reference pressure, in front of which is plot generation length, 0,3l, with the previously installed anchors of the second stage ahead of the zone of support pressure, and then as podvigina stope, once the site of generation with the previously installed anchors of the second stage, which was ahead of the zone of support pressure gradually falls under the influence of a finite part of the zone reference pressure to produce a gradual hardening of delaminated on this part of the roof rock by forcing them fixing solution through the hollow anchor the second line, creating in the roof framing zone hardening, helps to slow down processorthe cracks, bundles in the thickness of the rocks of the roof framing, upon completion of the hardening of the roof rocks at the site of generation, which was under the influence of a finite part of the zone reference pressure, re-establish, anchor the second line at the next ordinary plot develop subject mentioned ahead of stope and produce hardening stratified rocks of the roof at the previous regular site generation with installed anchors of the second stage after falling under the influence of a finite part of the zone reference pressure stope, in the future, as podvigina stope continue in the order described below to perform the installation of the anchors of the second stage ahead of the zone of support pressure and strengthening of the stratified rocks of the roof framing in the period of effect of a finite part of the zone bearing pressure on these and related operations sections of the output.

2. The method according to claim 1, characterized in that to allow hardening of the stratified rocks of the roof to a height of arch collapse framing anchor the second line set to a depth of not less than the width of the supported output.



 

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19 cl, 4 dwg

FIELD: mining.

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

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

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