CN-122014246-A - Method for controlling surrounding rock of crossheading well of comprehensive mechanized mining working face of vertical trough coal

CN122014246ACN 122014246 ACN122014246 ACN 122014246ACN-122014246-A

Abstract

The invention relates to the technical field of coal mine pressure and surrounding rock control, in particular to a method for controlling surrounding rock of a crossheading well of a comprehensive mechanized mining working face of vertical trough coal; the invention constructs a gate way well in coal beds on two sides of a working face of the vertical trench coal through a reverse well construction process, constructs a gate way well protection area on one side of a goaf close to the gate way well, performs anchor cable reinforcement and high-water material filling on a top and bottom plate in the protection area, injects cementing materials into the goaf except the protection area for filling, and fills high-strength cementing materials after cutting the top and bottom plates according to preset sections, so that a rock pillar isolation layer is formed after consolidation, and stress transmission of the goaf on the upper part is blocked. And repeating working face stoping, protection area construction, reinforcement and goaf filling until the stoping of the whole working face is completed.

Inventors

AN YI
MA LIQIANG
XI CHENGUANG
REN JIANWEI
HUANG SHENGYING
ZHANG ZHENGWEI
JIANG RUI
WANG CHAOYANG
LIU QINGLI

Assignees

天山实验室
陕西科索矿业有限公司
新疆工程学院
郑州煤矿机械集团有限责任公司
郑州郑煤设计工程有限公司

Dates

Publication Date: 20260512
Application Date: 20260215

Claims (8)

1. A method for controlling surrounding rock of a crossheading well of a working face for comprehensive mechanized mining of vertical trough coal is characterized by comprising the following steps: Firstly, arranging a crossheading well in a stoping coal seam, and respectively constructing the crossheading well and supporting the same on two sides of a working face of the vertical chute coal by using a reverse well construction process; secondly, presetting a protection area on one side of a goaf, which is close to two crossheading wells, in the stoping process of the working face, and timely reinforcing a top bottom plate in the range of the protection area by using anchor cables and filling the protection area; thirdly, filling foam materials at low positions and cementing materials at high positions in a preset distance in the goaf outside the protection area; fourthly, cutting off and blasting the top plate and the bottom plate at a preset segmentation position, and grouting and solidifying a goaf of a cutting region to form a rock pillar isolation layer; And fifthly, repeating the second step, the third step and the fourth step until the control of surrounding rock in the whole working face stoping process is completed.
2. The method for controlling surrounding rock of the crossheading well of the working face for comprehensive mechanized exploitation of the vertical trough coal, according to claim 1, is characterized in that in the first step, the construction method for constructing the crossheading well is that the crossheading well is respectively arranged in coal beds at two sides of the working face, directional drilling is completed in the coal beds by using a directional drilling machine, the well is reamed by using a reverse well drilling machine Cheng Shuncao, then the crossheading well is permanently supported, and facilities are arranged in the crossheading well.
3. The method for controlling the surrounding rock of the crossheading well on the working face of the comprehensive mechanized mining of the vertical trough coal is characterized in that the supporting method comprises the steps of supporting through anchor rods or/and anchor cable anchor nets in a spraying mode, or/and the facility in the crossheading well is arranged in the crossheading well, at least three I-shaped steel longitudinal columns are respectively arranged at two sides, close to a top plate and a bottom plate, of the crossheading well along the inclined direction of the coal bed at intervals, the I-shaped steel longitudinal columns are fixed with a rock stratum of the top plate through anchor cables, ring beams and horizontal steel beams are installed at heights matched with the preset mining height of the working face along the axial direction, the ring beams and the horizontal steel beams are installed together with the I-shaped steel longitudinal columns at corresponding positions, and a plurality of arc plates are installed between every two adjacent ring beams to form a closed cylindrical structure.
4. The method for controlling surrounding rock of the crossheading well on the working face of comprehensive mechanized mining of the vertical trough coal as claimed in claim 1, 2 or 3, wherein in the second step, the range of the protection area is divided, and the top and bottom plates of the protection area are reinforced in advance and filled after mining at a distance of 3 to 5 times the thickness of the coal layer on the center line of the crossheading well on the working face.
5. The method for controlling the surrounding rock of the crossheading well on the working face of comprehensive mechanized mining of the vertical trough coal, as set forth in claim 1 or 4, is characterized in that the inner top and the bottom plate of the protection area are reinforced by adopting constant-resistance large-deformation anchor cables, high-water materials are injected into the flexible membrane bags for filling in time, or secondary grouting reinforcement is carried out between the flexible membrane bags through a reserved grouting window of the pit shaft of the crossheading well.
6. The method for controlling the surrounding rock of the crossheading well on the working face for comprehensive mechanized mining of the vertical trough coal according to claim 1 or 4, wherein the goaf outside the protection area is filled with foam in a low-level manner in the working face stoping process, so that a sealing area is formed above the support.
7. The method for controlling surrounding rock of the crossheading well on the working face for comprehensive mechanized mining of the vertical trough coal according to claim 1 or 4, wherein the goaf outside the protection area is filled with high-level filling materials which are cementing materials in the working face stoping process.
8. The method for controlling surrounding rock of the crossheading well on the working face for comprehensive mechanized mining of the vertical trough coal according to claim 1 or 4, wherein working face stoping, protection area construction and goaf filling are carried out, the top and bottom plates are blasted and cut off on the preset sections of the working face, the goaf after cutting is filled with high-strength cementing materials, a rock pillar isolation layer is formed after consolidation, and stress transmission of the goaf at the upper part is blocked.

Description

Method for controlling surrounding rock of crossheading well of comprehensive mechanized mining working face of vertical trough coal Technical Field The invention relates to the technical field of coal mine pressure and surrounding rock control, in particular to a method for controlling surrounding rock of a crossheading well of a comprehensive mechanized mining working face of vertical trough coal. Background At present, the gateway roadway support of the gently inclined coal seam is mainly supported by adopting an anchor rod (cable) net in combination according to a new Otto method. If soft rock or geological structural belt is encountered, the anchor rod (rope) is matched with the I-shaped steel frame shed for reinforcement support, and for the gateway with serious surrounding rock efflorescence and spalling phenomenon, a slurry spraying closed treatment mode is adopted, or the anchor rod (rope) is combined with the contractible U-shaped steel support. The patent document with the publication number of CN120520629A relates to the technical field of vertical shaft supporting equipment, and specifically discloses an anchor cable and a vertical shaft supporting structure, which comprises an anchor head, a connecting piece and an anchor plate, wherein the anchor head is embedded in an anchor hole, the anchor plate is positioned outside the anchor hole, the connecting piece is used for connecting the anchor head and the anchor plate, the anchor head comprises an anchor body with a cavity inside, an elastic air bag and a plurality of anchor shells which are arranged on the anchor body in a surrounding manner, the part, between the elastic air bag and the inner wall of the anchor head, of the elastic air bag is filled with anchoring liquid, a plurality of overflow holes are formed in an annular array on the anchor body, a first film is arranged on the overflow holes, a plurality of long holes are formed in an annular array on the anchor body, a second film is arranged on the long holes, the vertical shaft supporting structure comprises an anchor cable, inner lining rings and an anchor net, a plurality of inner lining rings are arranged in an inner space of the vertical shaft, an anchor net is paved between the inner lining rings and the vertical shaft, and the anchor plate of the anchor cable is connected with the lining rings. The method solves the problems of complicated steps, high supporting cost, low construction efficiency and the like in the existing shaft supporting construction. Patent document with bulletin number of CN220978059U discloses an ultra-deep shaft supporting structure for high abrupt rock slope topography, including setting up the anchor pier at the excavation slope, the anchor pier is connected with prestressing force anchor rope cooperation and is anchored the dangerous rock soil on the excavation slope, the natural side slope in upper end of excavation slope is provided with initiative protection network, anchor pier, anchor rope and initiative protection network have formed the preliminary bracing of supporting structure sets up many steel-pipe piles in upper portion slope elevation along slope position department, and a plurality of steel-pipe piles are arranged side by side, a plurality of the top of steel-pipe pile sets up the crown roof beam and connects fixedly, crown roof beam top is provided with and turns up the barricade and prevent that soil and stone from falling, steel-pipe pile, crown roof beam, upward turn up the barricade and have formed the secondary support of supporting structure. The utility model solves the technical problems that large machinery in the technical field of deep foundation pit and high slope supporting structures cannot be constructed, the safety of a vertical shaft structure is low, more joints are easy to generate in the traditional construction method, the quality problem is caused, the construction time is long, the efficiency is low and the like. The patent document with the publication number of CN117189121A discloses a method for supporting a mining area courtyard under the complex geological condition of an underground mine, which comprises the following steps of S1, courtyard construction, S2, shaft lining manufacture, S3, shaft bottom steel structure installation, S4, shaft lining installation and S5, filling reinforcement, wherein the construction is divided into two steps of shaft lining manufacture and installation and filling of a supporting area between a well wall and a shaft lining, the defects and weak points of difficult traditional courtyard supporting, poor supporting effect and the like are well overcome, the construction efficiency is high, the supporting strength can be achieved through single filling, the complex repeated reinforcement and maintenance are not needed, the availability in the underground mine is very high, the service life of the courtyard is greatly prolonged, the operation cost of a mine enterprise is reduced,