CN110985083A - Stoping roadway stack type support supporting system and method - Google Patents
Stoping roadway stack type support supporting system and method Download PDFInfo
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- CN110985083A CN110985083A CN201911199183.3A CN201911199183A CN110985083A CN 110985083 A CN110985083 A CN 110985083A CN 201911199183 A CN201911199183 A CN 201911199183A CN 110985083 A CN110985083 A CN 110985083A
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- 230000008093 supporting effect Effects 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005065 mining Methods 0.000 claims abstract description 41
- 230000003137 locomotive effect Effects 0.000 claims description 27
- 239000000725 suspension Substances 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000002452 interceptive effect Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 10
- 239000003245 coal Substances 0.000 description 10
- 239000011435 rock Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0056—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with individual advancing shifting devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/60—Devices for withdrawing props or chocks
- E21D15/606—Devices for withdrawing props or chocks the props being moved systematically
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
- E21D23/0013—Frame type supports
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- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a support system and a support method for a stack type support of a mining roadway. The method comprises the steps of S1, determining the positions and the distances of different pressure bearing areas in front of and behind the mining roadway, and determining the types of the stacked supports and the support spacing; s2, installing a monorail crane; s3 arranging a stack type support in the forepoling area and the end support area for supporting; s4, at the early stage of mining of the working face, arranging the stack type support in a newly formed advance support area and an end support area by adopting a mode of lifting and moving the stack type support by a monorail crane; s5, hoisting the stack type support at the tail end of the roadway to the front end of the advance support area in the working face stoping process, and arranging the stack type support; s6 when the working surface is pushed to the mining stopping line, withdrawing the stack type support. The invention has good supporting effect on the roadway in the area near the working face and high degree of mechanization.
Description
Technical Field
The invention relates to a roadway support system and a withdrawal method, in particular to a stoping roadway stack type support system and a method suitable for large-section gob-side entry retaining.
Background
The stoping roadway is a roadway which forms a coal face and serves the coal face in coal mining work. The gob-side entry retaining is used as one kind of mining entry, and is used for retaining the entry in the mining process of the working face when the wall type mining is carried out on the coal mine, and is used for ventilation, material transportation and drainage of the working face or the mining of the next working face. In the working face propelling process, according to the mining influence degree of a roadway, the engineering construction condition in the roadway and the roadway state, in combination with the prior field monitoring data, except for an end supporting area and a forepoling area, an area, namely a roadway stabilizing area, is newly added in front of the forepoling area in front of the working face, and two areas, namely a lagging temporary supporting area and a roadway stabilizing area, are newly added behind the working face.
At present, the gob-side entry retaining support mainly comprises two parts, namely an inner support and an outer support. The internal support is a support system consisting of anchor rods and anchor cables, and the external support mainly comprises a wood pile, a single support, a pile type support or an advance hydraulic support and the like. Because the stress borne by the roadway stable area, the advance supporting area, the end supporting area and the lagging temporary supporting area near the working surface is concentrated, the displacement and the deformation of the roadway top and bottom plates are large, and the area translates forwards along with the forward propulsion of the working surface, so that the area can select external supporting for temporary supporting.
At present, in gob-side entry retaining, an external support adopted in an area near a working face is mainly a single hydraulic prop matched with a pi-shaped beam support, but the support mode has the defects that ① support strength is insufficient, if the support cannot achieve proper strength when a top plate is subjected to large coal seam pressure, the top plate at an outlet of a fully mechanized mining face is likely to sink, particularly under the condition of a soft bottom plate, the single prop is more in drilled bottom and is difficult to withdraw, particularly in an area with dense top cutting at the rear part of the fully mechanized mining face, the potential safety hazard is high, ② support speed is low, the traditional advance support has low support effect, the prop withdrawal speed is low, the integral propelling speed of the working face is influenced, the coal mining efficiency and yield are reduced, ③ labor intensity is high, and the manual support and withdrawal are frequently carried out in the traditional advance process, so that the labor intensity is greatly increased.
Especially when the mining roadway that faces is the gob-side entry retaining of big section, the roof pressure that its tunnel receives is bigger, and the purpose is strutted to traditional supporting mode is difficult to reach more, and the supporting equipment withdrawal degree of difficulty is bigger, and the potential safety hazard that faces also is the geometric speed and increases.
Disclosure of Invention
The invention aims to provide a stoping roadway stack type support system and a stoping roadway stack type support method, which can be used for temporarily supporting a stoping roadway by using a stack type support, and have the advantages of simple stack type support retraction, high mechanization degree and high construction efficiency; the support is particularly suitable for supporting large-section gob-side entry retaining.
In order to achieve the purpose, the invention adopts a stoping roadway stack type support system, which comprises:
the locomotive running track is arranged on the stoping roadway and used for running the monorail crane;
the suspension fastener is used for installing the locomotive running track and is fixedly fixed on the top plate of the mining roadway;
the stack type support is arranged in the stoping roadway and used for temporarily supporting the stoping roadway;
the monorail crane is matched with the locomotive running track and used for conveying the stack type support;
and the hook is arranged on the monorail crane and used for hanging the stack type support.
The invention discloses a stoping roadway stack type support supporting method which specifically comprises the following steps:
s1: data acquisition and support design: determining the positions and distances of a roadway stabilizing area, a forepoling area, an end support area, a lagging temporary support area and a roadway forming stabilizing area in the stoping roadway range under the gob-side entry retaining condition according to the stoping range of the working face and the engineering geological condition; or determining the positions and distances of a stable roadway area, a forepoling area and an end shoring area within the range of the stoping roadway under the common stoping condition; then determining the type of the stack type support and the support distance of the stack type support;
s2: installing a monorail crane: before mining on a working face, grouting and reinforcing a top plate of a stoping roadway, then installing a suspension fastener, and then installing a locomotive running track and a monorail crane running the monorail crane below the suspension fastener;
s3: pre-forming an external bracing system: before the working face is pushed, reinforcing and supporting the top plates of the advance supporting area and the end supporting area, then arranging the stack type support in a mode of lifting and moving the stack type support by a monorail crane on the basis of the original permanent support, and passively supporting the advance supporting area and the end supporting area;
s4: primary support: in the early stage of working face extraction, the advance support area and the end support area translate forwards along with the forward propulsion of the working face; arranging the stack type support in a newly formed advance support area and an end support area by adopting a mode of lifting and moving the stack type support by a monorail crane;
s5: step-by-step support: in the working face extraction process, reinforcing supports are arranged on the top plates of the advance support area and the end support area in advance; under the condition of gob-side entry retaining, sequentially hoisting the stack type supports at the tail end of the lagging temporary support area to the front end of the advance support area in a mode of hoisting and moving the stack type supports by a monorail crane, and arranging the stack type supports to form a support system; under the condition of common stoping, sequentially hoisting the stack type supports at the tail ends of the end supporting areas to the front ends of the advance supporting areas, and arranging the stack type supports to form a supporting system;
s6: withdrawing the stack type support: and when the working surface is pushed to the mining stopping line, withdrawing the stack type support in a mode of hoisting the stack type support by using the monorail crane.
Preferably, under the condition of gob-side entry retaining, in step S2, the locomotive running track is located at the middle position of the roadway; in the steps S3 and S4, the manner of arranging the stack type supports is that two rows of stack type supports are arranged on two sides of the locomotive running track in the roadway in a staggered mode, and the direction of the cross beam of each stack type support is parallel to the extending direction of the roadway.
Preferably, under the ordinary recovery condition, in the steps S3 and S4, the stack type supports are sequentially arranged on one side of the locomotive running track on the premise of not interfering the running of the monorail crane.
Further, in step S1, the suspension fasteners are anchor rods, 3 anchor rods are installed in parallel on the surface perpendicular to the running track of the locomotive, and the lower ends of the anchor rods are connected with the monorail crane U-shaped steel through U-shaped shed clamps.
Preferably, in step S1, the hanging fastener is one of a grouting bolt, a cable bolt and a grouting cable bolt.
By the aid of the stack type support supporting system and the method for the mining roadway, the stack type support can be adopted for external supporting of the large-section gob-side entry retaining in the advancing process of the working face, the stack type support is matched with the monorail crane to retract, an efficient and safe external supporting system is formed, supporting strength and supporting area are increased remarkably, integrity of a top plate is kept to a great extent, the problem that supporting strength is insufficient in a traditional supporting mode is solved, supporting speed and retracting speed of the support are greatly improved by arranging the monorail crane, coal mining efficiency is improved, labor intensity of workers is relieved, large-space simple management of an end working area is achieved, and the stack type support supporting system and the method have important significance for safe and efficient mining of the working face.
Drawings
FIG. 1 is a top plan view of one embodiment of a method of supporting a mining roadway stack support of the present invention;
FIG. 2 is a side schematic view of the roadway of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the roadway of FIG. 1;
FIG. 4 is a top plan view of another embodiment of a method of supporting a mining roadway stack support of the present invention;
in the figure: 1. a coal rock mass; 2. a roadway; 3. a gob; 4. a working surface; 5. a stack support; 6. a monorail crane; 7. a locomotive running track; 8. a suspension fastener; 9. hooking; A. a lane forming stable area; B. a delayed temporary support area; C. an end support area; D. a forepoling zone; E. and (5) stabilizing the roadway.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. The invention aims to provide a stoping roadway stack type support system and a stoping roadway stack type support method. The invention is illustrated below with reference to two examples.
In the embodiment 1, a large-section gob-side entry retaining is taken as an example, as shown in fig. 1, a roadway 2 is a large-section gob-side entry retaining, and in the process of mining a coal rock mass 1, the mining influence degree of the roadway 2, the engineering construction condition in the roadway 2 and the state of the roadway 2 are combined with the previous field monitoring data, and the roadway 2 is divided into a roadway stabilizing area E, a forepoling area D, an end support area C, a lagging temporary support area B and a roadway stabilizing area a in the extending direction from a working surface 4 to a working surface 4; and determines the location and distance of the area. The present invention will be explained below on the premise of example 1.
The invention provides a stoping roadway stack type support supporting system, as shown in figures 1 to 3, comprising: the locomotive running track 7 is arranged on the stoping roadway and is used for running the monorail crane 6; the suspension fastener 8 is used for installing the locomotive running track 7 and is fixedly fixed on the top plate of the mining roadway; the stack type support 5 is arranged in the stoping roadway and used for temporarily supporting the stoping roadway; a monorail crane 6 cooperating with the locomotive running track 7 for transporting the stack type support 5; a hook 9 which is arranged on the monorail crane 6 and is used for hanging the stack bracket 5.
The stack type support 5 is used for temporarily supporting the roadway 2, and the stack type support 5 does not need special supporting facilities such as a pump station and the like, so that the support strength is high, the effective support area is large, and the stability is good. When the roadway bottom plate is mudstone or other softer rock strata, the stack type support 5 cannot sink into the ground, so that the support moving is difficult; the top plate can not be repeatedly supported, so that the top plate is broken, and the effective supporting area is reduced; when the stack type support 5 is arranged, the support can penetrate through the supporting gap of the original anchor net cable, the original supporting system is not damaged, and the effectiveness of permanent supporting is greatly protected; the effective construction area of the 4 ends of the working face is obviously enlarged, the ventilation of the roadway is convenient, the operation is simple, the supporting efficiency is high, and the influence on the recovery efficiency is small.
In the process that the working face 4 is pushed forwards, the stack type support 5 is conveyed through the monorail crane 6, and the support is conveyed, so that the supporting efficiency is improved, the labor intensity of workers is relieved, and the method has important significance in improving the safety and high-efficiency mining of the stope working face 4.
Aiming at the situation described in embodiment 1, the method for supporting the mining roadway stack type support, which is adopted by the invention, specifically comprises the following steps:
s1: data acquisition and support design: determining the positions and distances of a roadway stable area E, a forepoling area D, an end supporting area C, a lagging temporary supporting area B and a roadway forming stable area A in the range of a mining roadway according to the mining range of a working face and the engineering geological conditions, and determining the type of the stacked type support 5 and the supporting distance of the stacked type support 5;
s2: installing a monorail crane 6: before the working face 4 is mined, grouting and reinforcing a top plate of a roadway 2 for gob-side entry retaining, mounting suspension fasteners 8, wherein the suspension fasteners 8 are anchor rods, 3 anchor rods are arranged in parallel on the face perpendicular to a locomotive running track 7, and the lower ends of the anchor rods are connected with U-shaped steel on a monorail crane 6 through U-shaped shed clamps as shown in figure 3; and for the roof intensity, preferably, dress hangs fastener 8 and is one kind in slip casting stock, anchor rope, the slip casting anchor rope, can select according to the crack condition of roof. When the cracks of the top plate develop comparatively, a grouting anchor rod or a grouting anchor cable can be selected, and the top plate is reinforced through grouting, so that the anchor rod is more stable;
when the locomotive running track 7 is installed, the locomotive running track 7 is required to be ensured to be positioned in the middle of the roadway 2;
then installing a locomotive running track 7 for running the monorail crane and the monorail crane 6 below the suspension fastener 8; as shown in fig. 1-3;
s3: pre-forming an external bracing system: before the working face 4 is pushed, the top plates of the advance supporting area D and the end supporting area C are reinforced and supported, namely, the supporting is carried out again in the form of additionally beating anchor rods or anchor cables, so that the supporting performance is enhanced, and the supporting effect is improved. Secondly, on the basis of the original permanent support, the stack type support 5 is arranged in a mode that a monorail crane 6 is used for lifting and moving the stack type support 5, and passive support is carried out on the advance support area D and the end support area C; as shown in fig. 1, the manner of arranging the stack supports 5 is to arrange two rows of stack supports 5 at two sides of the locomotive running track 7 in the roadway 2 in a staggered manner; the direction of the cross beam of the stack bracket 5 is parallel to the extending direction of the roadway 2, as shown in fig. 2;
because two rows of the stack type supports 5 are arranged in a staggered mode, the top plate of the roadway 2 can be continuously supported, the supporting force borne by the top plate is more uniformly distributed, and the stack type supports 5 are safer and more reliable when being withdrawn.
S4: primary support: in the early stage of stoping of the working face 4, the forepoling area D and the end poling area C translate forwards along with the forward advance of the working face 4, and a lagging temporary poling area B is gradually formed behind the working face 4; arranging the stack type support 5 in a newly formed advance support area D and an end support area C in a mode of lifting and moving the stack type support 5 by a monorail crane 6; meanwhile, in order to reduce the influence of the advanced bearing pressure, in the process of advancing the working face 4, in front of the advanced support area D, advance pre-splitting joint cutting and roof reinforcing support are carried out on the roadway; the arrangement of the pallet 5 is also in the manner of step S3;
s5: step-by-step support: in the working face 4 stoping process, reinforcing and supporting the top plates in the advance supporting area D and the end supporting area C in advance; forming a roadway stable area A after the temporary support area B lags behind, adopting a mode of hoisting and moving the stack type supports 5 by a monorail crane 6, sequentially hoisting the stack type supports 5 positioned at the tail end in the two rows of stack type supports 5 in the temporary support area B lags behind to the front end of the advance support area D, and arranging the stack type supports 5 to form a support system;
because the lagging temporary support area B is positioned behind the end support area C and is under the influence of 4-cycle incoming pressure dynamic pressure of the working face after the working face 4 is recovered, roadway side gangue blocking protection and lagging temporary support are preferably carried out in a certain area behind the end transition support at the distance of 4 ends of the working face and the lagging temporary support area B;
the lagging temporary support zone B is generally located behind the working face 4; after the entry forming stable area A is located in the lag temporary support area B, the entry forming stable area A continues to be pushed along with the working face 4, when the entry retaining is far away from the working face 4, the working face 4-period coming pressure has small influence on the roadway, the movement of the roof rock stratum in the goaf 3 basically tends to be stable, and the lag temporary support is withdrawn at the moment;
s6: withdrawing the stacked bracket 5: and when the working surface 4 is pushed to the mining stopping line, withdrawing the stack type support 5 by utilizing a mode of hoisting the stack type support 5 by the monorail crane 6.
The invention is explained again with reference to example 2.
In example 2, taking a normal stoping roadway as an example, as shown in fig. 4, when the working face 4 advances forward, the roof behind the working face 4 collapses to form a gob 3. The roadway 2 is a common stoping roadway, and the roadway 2 behind the working face 4 does not need to be reserved and maintained. Compared with a large-section gob-side entry retaining, the pressure of rock mass faced by a common stoping roadway is smaller, so that the single-row stack type support 5 is adopted during supporting. In a specific implementation step, the stacked brackets 5 are sequentially arranged on one side of the locomotive running track 7 on the premise of not interfering the operation of the monorail crane 6, as shown in fig. 4, the stacked brackets can be arranged on one side of the locomotive running track 7 far away from the working surface 4, and the interference with mining and transportation equipment can be avoided. In the step S5, sequentially hoisting the stack type supports 5 at the tail end of the end head supporting area C to the front end of the advance supporting area D, and arranging the stack type supports 5 to form a supporting system; the rest steps are the same as the steps in the embodiment 1, and the lifting and the carrying of the stack bracket 5 are carried out in a mode of lifting the stack bracket 5 by the monorail crane 6.
By the aid of the stack type support supporting system and the method for the mining roadway, the stack type support 5 can be adopted for external supporting of the large-section gob-side entry retaining in the advancing process of the working face 4, the support is retracted by the aid of the monorail crane 6, an efficient and safe external supporting system is formed, supporting strength and supporting area are increased remarkably, integrity of a top plate is kept to a great extent, the problem that supporting strength is insufficient in a traditional supporting mode is solved, supporting speed and support retracting speed are greatly improved by the aid of the monorail crane, coal mining efficiency is improved, labor intensity of workers is relieved, large-space simple management of an end working area is achieved, and the system and the method have important significance for safe and efficient mining of the working face 4.
Claims (6)
1. The utility model provides a recovery tunnel buttress formula support supporting system which characterized in that includes:
the locomotive running track is arranged on the stoping roadway and used for running the monorail crane;
the suspension fastener is used for installing the locomotive running track and is fixedly fixed on the top plate of the mining roadway;
the stack type support is arranged in the stoping roadway and used for temporarily supporting the stoping roadway;
the monorail crane is matched with the locomotive running track and used for conveying the stack type support;
and the hook is arranged on the monorail crane and used for hanging the stack type support.
2. A stoping roadway stack type support supporting method specifically comprises the following steps:
s1: data acquisition and support design: determining the positions and distances of a roadway stabilizing area, a forepoling area, an end support area, a lagging temporary support area and a roadway forming stabilizing area in the stoping roadway range under the gob-side entry retaining condition according to the stoping range of the working face and the engineering geological condition; or determining the positions and distances of a stable roadway area, a forepoling area and an end shoring area within the range of the stoping roadway under the common stoping condition; then determining the type of the stack type support and the support distance of the stack type support;
s2: installing a monorail crane: before mining on a working face, grouting and reinforcing a top plate of a stoping roadway, then installing a suspension fastener, and then installing a locomotive running track and a monorail crane running the monorail crane below the suspension fastener;
s3: pre-forming an external bracing system: before the working face is pushed, reinforcing and supporting the top plates of the advance supporting area and the end supporting area, then arranging the stack type support in a mode of lifting and moving the stack type support by a monorail crane on the basis of the original permanent support, and passively supporting the advance supporting area and the end supporting area;
s4: primary support: in the early stage of working face extraction, the advance support area and the end support area translate forwards along with the forward propulsion of the working face; arranging the stack type support in a newly formed advance support area and an end support area by adopting a mode of lifting and moving the stack type support by a monorail crane;
s5: step-by-step support: in the working face extraction process, reinforcing supports are arranged on the top plates of the advance support area and the end support area in advance; under the condition of gob-side entry retaining, sequentially hoisting the stack type supports at the tail end of the lagging temporary support area to the front end of the advance support area in a mode of hoisting and moving the stack type supports by a monorail crane, and arranging the stack type supports to form a support system; under the condition of common stoping, sequentially hoisting the stack type supports at the tail ends of the end supporting areas to the front ends of the advance supporting areas, and arranging the stack type supports to form a supporting system;
s6: withdrawing the stack type support: and when the working surface is pushed to the mining stopping line, withdrawing the stack type support in a mode of hoisting the stack type support by using the monorail crane.
3. The method for supporting the stoping roadway stack type bracket according to claim 2, wherein under the condition of gob-side entry retaining, in step S2, the locomotive running track is located at the middle position of the roadway; in the steps S3 and S4, the manner of arranging the stack type supports is that two rows of stack type supports are arranged on two sides of the locomotive running track in the roadway in a staggered mode, and the direction of the cross beam of each stack type support is parallel to the extending direction of the roadway.
4. The method for supporting the mining roadway stack type support frame according to claim 2, wherein under the ordinary mining condition, in the step S3 and the step S4, the stack type support frame is sequentially arranged on one side of the locomotive running track on the premise of not interfering the operation of the monorail crane.
5. The method for supporting the mining roadway stack type bracket as claimed in claim 3 or 4, wherein in the step S1, the suspension fasteners are anchor rods, 3 anchor rods are arranged in parallel on the surface vertical to the running track of the locomotive, and the lower ends of the anchor rods are connected with the monorail crane U-shaped steel through U-shaped shed clips.
6. The method for supporting the mining roadway stack type bracket as claimed in claim 3 or 4, wherein in the step S1, the hanging fastener is one of a grouting anchor rod, a cable rope and a grouting cable rope.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112610258A (en) * | 2020-12-09 | 2021-04-06 | 中国矿业大学 | Impact mine stoping roadway advanced support method applied to smart mine |
| CN113482635A (en) * | 2021-07-08 | 2021-10-08 | 淮北矿业股份有限公司 | Parallel construction method for installing and expanding cutting brush based on stack type support reinforced long-span top plate |
| CN114803546A (en) * | 2022-04-26 | 2022-07-29 | 临沂矿业集团菏泽煤电有限公司郭屯煤矿 | Powerful belt coal bunker mouth waste rock blocking device |
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