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CN-120667191-B - Gob-side entry retaining supporting device capable of improving recovery rate

CN120667191BCN 120667191 BCN120667191 BCN 120667191BCN-120667191-B

Abstract

The invention discloses a gob-side entry retaining support device for improving the recovery rate, which comprises a support system, wherein the support system comprises a frame body connected to a bottom plate through a base block, the frame body is respectively and correspondingly arranged at two sides of a goaf, a transverse sliding cavity vertical to the gob-side entry retaining is arranged in the frame body, a transverse sliding block connected through a spring is hermetically and slidingly arranged on the transverse sliding cavity, the transverse sliding blocks corresponding to the two sides of the goaf are connected through a steel chain, a vertical sliding cavity is arranged at the upper end of the frame body, a support device is arranged in the vertical sliding cavity, gangue is respectively filled in the return air tunnel at one side of the support system and the goaf where the steel chain is positioned, and a reinforcing device is also arranged on the support system at one side of the gob-side entry retaining.

Inventors

  • DING GUOFENG
  • LV ZHENFU
  • LIU HANGTAO

Assignees

  • 中国地质科学院郑州矿产综合利用研究所

Dates

Publication Date
20260512
Application Date
20250718

Claims (9)

  1. 1. The gob-side entry retaining support device for improving the stoping rate comprises a support system (6), and is characterized in that the support system (6) comprises a frame body (61) connected to a bottom plate (9) through a base block (92), the frame body (61) is respectively and correspondingly arranged on two sides of a goaf (5), a horizontal sliding cavity (611) perpendicular to the gob-side entry retaining (4) is arranged in the frame body (61), the horizontal sliding cavity (611) is hermetically slid with a horizontal sliding block (62) connected through a first spring (64), the horizontal sliding blocks (62) corresponding to two sides of the goaf (5) are connected through a steel chain (63), a vertical sliding cavity (615) is arranged at the upper end of the frame body (61), a support device (65) is arranged in the vertical sliding cavity (615), gangue (7) is respectively filled in the goaf (5) on one side of the support system (6), and a reinforcing device (8) is also arranged on the support system (6) on one side of the gob-side entry retaining (4); Reinforcing means (8) are including fixing extension board (81) on framework (61), vertically run through on extension board (81) have traveller (82), traveller (82) upper end is connected with carrier plate (83), carrier plate (83) upper end is provided with pneumatic cylinder (87), traveller (82) lower extreme slip cover has slide (85), slide (85) are connected through spring two (84) with carrier plate (83), slide (85) lower extreme is equipped with trapezoidal slider (86), and be equipped with on horizontal slider (62) and push away slider (641), push away be equipped with on slider (641) with trapezoidal slider (86) cooperation top pushing slip trapezoidal sliding surface (642).
  2. 2. The gob-side entry retaining support device for improving the recovery rate according to claim 1, wherein the support device (65) comprises a jacking block (651) and an air bag frame (652), the jacking block (651) is hermetically slid on the vertical sliding cavity (615), the air bag frame (652) is sleeved outside the frame body (61), the horizontal sliding cavity (611) is communicated with a main runner (612), the main runner (612) is connected with the vertical sliding cavity (615) through a branch runner I (613), and the main runner (612) is connected with the air bag frame (652) through a branch runner II (614).
  3. 3. The gob-side entry retaining support device for improving the recovery rate according to claim 1, wherein the upper ends of the hydraulic cylinder (87) and the jacking block (651) are respectively provided with a buffering jacking (10), the buffering jacking (10) comprises a seat plate (101), a semicircular convex column (102) is arranged in the center of the upper end of the seat plate (101), a top plate (103) is rotatably sleeved on the semicircular convex column (102), and the plate surfaces on two sides of the top plate (103) are respectively connected with the seat plate (101) through springs III (104).
  4. 4. The gob-side entry retaining support device for improving the recovery rate according to claim 1, wherein a grouting pipe (66) is arranged on a frame body (61) at the gob-side entry retaining (4), the grouting pipe (66) transversely penetrates through the frame body (61) and a transverse sliding block (62) at two sides of a goaf (5), and a grouting hole (661) is further formed in the pipe wall of the grouting pipe (66) at the goaf.
  5. 5. The gob-side entry retaining support device for improving the recovery rate according to claim 1, wherein a pressure regulating pipe (67) is arranged on a frame body (61) positioned at the gob-side entry retaining (4), and the pressure regulating pipe (67) penetrates through transverse sliding blocks (62) at two sides of a goaf and is connected with a transverse sliding cavity (611) at the side of a return air roadway (2).
  6. 6. The gob-side entry retaining support device for improving the recovery rate according to claim 1, wherein the end surface of the lateral slider (62) close to the goaf (5) side is in an obtuse angle structure with the horizontal surface of the goaf (5) side.
  7. 7. The gob-side entry retaining support device for improving the recovery rate according to claim 1, wherein at least two steel chains (63) are arranged between corresponding transverse sliding blocks (62) on two sides of the goaf (5).
  8. 8. The gob-side entry retaining support device for improving the recovery rate according to claim 1, wherein a bottom groove (616) is formed in the lower end of the frame body (61), a grouting runner (618) connected with the bottom groove (616) is further formed in the frame body (61), and a slurry containing groove (91) corresponding to the bottom groove (616) is formed in the bottom plate (9).
  9. 9. The gob-side entry retaining support device for improving a recovery rate according to claim 8, wherein a plurality of vertical ribs (617) are arranged at the bottom of the bottom groove (616).

Description

Gob-side entry retaining supporting device capable of improving recovery rate Technical Field The invention relates to the technical field of gob-side entry retaining supports, in particular to a gob-side entry retaining support device for improving recovery rate. Background The traditional longwall mining needs to leave a section coal pillar with the width of 10-30 meters for supporting a top plate, isolating a goaf and preventing gas leakage, and the coal pillar resources are generally difficult to recover, so that coal resource waste is caused, and the recovery rate is reduced. The gob-side entry retaining means that the transportation roadway of the last coal face is reserved and used as the return air roadway of the next coal face, and the roadway on one side of the transportation roadway, which is close to the goaf, is subjected to reinforced support to replace a coal pillar to support a roadway top plate, so that the coal mine recovery rate is improved. At present, the gob-side entry retaining is positioned at the edge of the goaf and directly bears the complex mine pressure effect caused by the severe movement of an overlying strata and the compaction of the gangue in the goaf. The method comprises the step of generating huge dynamic downward pressure and rock burst on the roof at the side of the gob in the process of caving and settling the roof at the gob. In the compaction process of goaf gangue, the goaf gangue is easy to generate strong transverse extrusion and expansion pressure on the gob-side entry retaining side, especially on one side close to the goaf, and the conventional rigid supporting structure is difficult to adapt to dynamically-changed mine pressure, and is easy to deform, damage and even lose efficacy, so that the roadway section is contracted, and ventilation and safe use are affected. Therefore, it is necessary to provide a gob-side entry retaining supporting device for improving the recovery rate so as to solve the problems in the prior art. Disclosure of Invention The gob-side entry retaining support device comprises a support system, wherein the support system comprises a frame body connected to a bottom plate through a base block, the frame bodies are respectively and correspondingly arranged on two sides of a goaf, a transverse sliding cavity perpendicular to the gob-side entry retaining is arranged in the frame body, a transverse sliding block connected through a spring I is hermetically and slidingly arranged on the transverse sliding cavity, the transverse sliding blocks corresponding to the two sides of the goaf are connected through a steel chain, a vertical sliding cavity is arranged at the upper end of the frame body, the support device is arranged in the vertical sliding cavity, the goaf on one side of the support system and the goaf on which the steel chain is arranged are respectively filled with gangue, and a reinforcing device is further arranged on the support system on one side of the gob-side entry retaining. Preferably, the supporting device comprises a top block and an air bag frame, the top block is hermetically and slidably arranged on the vertical sliding cavity, the air bag frame is sleeved outside the frame body, the horizontal sliding cavity is communicated with a main runner, the main runner is connected with the vertical sliding cavity through a branch runner I, and the main runner is connected with the air bag frame through a branch runner II. Preferably, the reinforcing device comprises a support plate fixed on the frame body, a sliding column vertically penetrates through the support plate, the upper end of the sliding column is connected with a carrier plate, the upper end of the carrier plate is provided with a hydraulic cylinder, the lower end of the sliding column is slidably sleeved with a sliding plate, the sliding plate is connected with the carrier plate through a second spring, the lower end of the sliding plate is provided with a trapezoidal sliding block, a pushing sliding block is arranged on the transverse sliding block, and a trapezoidal sliding surface matched with the trapezoidal sliding block to push and slide is arranged on the pushing sliding block. Preferably, the upper ends of the hydraulic cylinder and the jacking block are respectively provided with a buffering jacking pad, the buffering jacking pad comprises a seat plate, a semicircular convex column is arranged at the center of the upper end of the seat plate, a top plate is sleeved on the semicircular convex column in a rotating mode, and the plate surfaces of the two sides of the top plate are respectively connected with the seat plate through springs. Preferably, the grouting pipe is arranged on the frame body at the gob-side entry retaining position, transversely penetrates through the frame body and the transverse sliding blocks at two sides of the goaf, and the grouting pipe wall at the goaf is also provided with a grouting hole. Preferably, a pressure regulating p