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CN-121976827-A - Underground mining supporting device for preventing mine collapse

CN121976827ACN 121976827 ACN121976827 ACN 121976827ACN-121976827-A

Abstract

The invention discloses an underground mining support device for preventing mine collapse, which belongs to the field of mine mining equipment and comprises lifting mechanisms symmetrically arranged on the left side and the right side of a roadway, wherein top seats are arranged at the tops of the lifting mechanisms, supporting units distributed along the circumferential direction of the roadway are arranged between the top seats, each supporting unit comprises an inner-layer high-strength bearing pipe, a middle-layer gradient yielding pipe and a corrugated supporting pipe which are sequentially arranged from inside to outside, a plurality of buffer connectors and variable resistance nodes are equidistantly arranged between the inner-layer high-strength bearing pipe and the middle-layer gradient yielding pipe, a side wall laminating layer is arranged on one side, close to the roadway, of the lifting mechanism, each side wall laminating layer comprises a plurality of laminating pipe installation structures distributed along the vertical direction, and laminating pipes are arranged in each laminating pipe installation structure. The invention realizes gradient yielding bearing matched with surrounding rock deformation time course and form, can decouple and process composite deformation, avoids brittle failure and bending failure of the support, and remarkably improves the support stability and collapse prevention capability of the deep mine roadway.

Inventors

  • LIU ZHEN
  • An Zhihai
  • YIN YANTIAN
  • LIU XINGQUAN
  • PENG CHAO
  • LI GUILIN
  • WU QINZHENG
  • ZHANG HAOQIN

Assignees

  • 山东黄金矿业科技有限公司深井开采实验室分公司

Dates

Publication Date
20260505
Application Date
20260402

Claims (10)

  1. 1. The underground mining support device for preventing mine collapse is characterized by comprising lifting mechanisms (8) symmetrically arranged on the left side and the right side of a roadway (1), top seats (7) are arranged at the tops of the lifting mechanisms (8), support units distributed circumferentially along the roadway (1) are arranged between the top seats (7), each support unit comprises an inner-layer high-strength bearing pipe (4), a middle-layer gradient yielding pipe (3) and a corrugated supporting pipe (2) which are sequentially arranged from inside to outside, a plurality of buffer connecting pieces (5) and variable resistance nodes (6) are equidistantly arranged between the inner-layer high-strength bearing pipe (4) and the middle-layer gradient yielding pipe (3), a side wall laminating layer (9) is arranged on one side, close to the roadway (1), of each lifting mechanism (8), each side wall laminating layer (9) comprises a plurality of laminating pipe installation structures distributed along the vertical direction, and laminating pipes are arranged in each laminating pipe installation structure.
  2. 2. The underground mining support device for preventing mine collapse according to claim 1, wherein the corrugated support tube (2) and the attaching tube are filled with high molecular water-absorbing expansion particles.
  3. 3. Underground mining support device for preventing collapse of mines according to claim 1, wherein the buffer connection (5) and the variable resistance nodes (6) are staggered.
  4. 4. The underground mining support device for preventing mine collapse according to claim 1, wherein the buffer connection piece (5) comprises a sleeve (501), a telescopic rod (502) is arranged in the sleeve (501) in a sliding mode, a bottom plate (503) is arranged at one end, far away from the sleeve (501), of the telescopic rod (502), hinge holes (504) are formed in the top of the sleeve (501) and the bottom of the bottom plate (503) in an integrated mode, the hinge holes (504) are connected between the inner high-strength bearing pipe (4) and the middle-layer gradient yielding pipe (3) in a hinged mode, external threads (505) are formed in the outer side wall of the sleeve (501), an adjustable top plate (506) is connected on the external threads (505), and springs (507) are sleeved on the sleeve (501) between the adjustable top plate (506) and the bottom plate (503).
  5. 5. The underground mining support device for preventing mine collapse according to claim 1, wherein the variable resistance node (6) comprises symmetrically distributed lug plates (601) integrally formed on the inner-layer high-strength bearing pipe (4), hinge shafts (602) are rotatably arranged between the lug plates (601), barrel cams (603) are arranged on the hinge shafts (602), threaded grooves (604) are formed in the barrel cams (603), driven rollers (605) are slidably arranged in the grooves (604), limit rods (606) are integrally formed at one ends, far away from the grooves (604), of the driven rollers (605), the limit rods (606) are arranged on the lug plates (601), clamping blocks (308) are arranged on the middle-layer gradient yield pipes (3) through connecting rods (607), and locking devices (10) are arranged at one ends of the hinge shafts (602).
  6. 6. The underground mining support device for preventing mine collapse according to claim 5, wherein the locker (10) comprises a limiting shaft (1001) arranged together with the hinge shaft (602), a rotating roller (1002) is slidably arranged on the periphery of the limiting shaft (1001), a first supporting plate (1003) and a second supporting plate (1004) are slidably arranged on two sides of the rotating roller (1002), a spanner (1006) is integrally formed on the outer side wall of the rotating roller (1002) close to one end of the first supporting plate (1003), a torsion spring (1005) is sleeved on the rotating roller (1002), one end of the torsion spring (1005) is arranged on the spanner (1006), the other end of the torsion spring (1005) is arranged on the second supporting plate (1004) far away from one side of the spanner (1006), a ratchet wheel (1007) is arranged on one end of the spanner (1006) far away from the rotating roller (1002), a pawl (1008) matched with the ratchet wheel (1007) is arranged on the inner side of a protective cover of the locker (10), and a reset spring is arranged between the rotating roller (1002) and the inner side wall of the protective cover.
  7. 7. The underground mining support device for preventing mine collapse as set forth in claim 6, wherein the outer side wall of the limiting shaft (1001) is integrally formed with a limiting protrusion (1009), and the inner side wall of the rotating roller (1002) is provided with a limiting groove matched with the limiting protrusion (1009).
  8. 8. The underground mining support device for preventing mine collapse as set forth in claim 6, wherein said wrench (1006) is provided with a clamping groove for clamping said torsion spring (1005).
  9. 9. The underground mining support device for preventing collapse of a mine according to claim 6, wherein the stroke of the limiting shaft (1001) in the rotary roller (1002) is consistent with the distance of the ratchet wheel (1007) from the pawl (1008).
  10. 10. The underground mining support device for preventing mine collapse according to claim 6, wherein the attaching pipe mounting structure comprises an opening sleeve (901), a mounting end (902) is arranged at one end, far away from the opening, of the opening sleeve (901), and a plurality of ventilation holes (903) are formed in the side wall of the opening sleeve (901).

Description

Underground mining supporting device for preventing mine collapse Technical Field The invention relates to the field of mining equipment, in particular to an underground mining support device for preventing mine collapse. Background As mining extends deeper (kilometers deep), roadway surrounding rock presents complex environmental features of "three high one disturbance" (high stress, high ground temperature, high osmotic pressure, strong mining disturbance). The existing supporting device mainly comprises an I-shaped steel shed bracket, a U-shaped steel contractible bracket, a steel pipe concrete bracket, an anchor rod and anchor cable supporting system, a single hydraulic prop and the like. However, the following technical drawbacks are common to the existing support devices in practical applications: 1. The support strength is not matched with the surrounding rock deformation time course, and the deformation of the soft rock or the extremely broken surrounding rock has the aging characteristic of 'fast before slow'. Most of the existing brackets are of an equal-rigidity structure, the initial rigidity is high, the bearing is too large to damage, and the later yielding amount is insufficient and cannot adapt to continuous rheology. 2. The form of the support is not matched with the form of the surrounding rock deformation, and the surrounding rock deformation has the characteristics of discontinuity and local abrupt change (such as sliding along joint surfaces and local rock falling). The traditional anchor rod is full-length continuous constraint and cannot adapt to local concentrated strain to cause brittle failure, and the traditional support is of a uniform stress structure and cannot cope with local pressure surge. 3. The composite deformation mode cannot be adapted, namely, in an inclined or steeply inclined ore body, surrounding rock deformation comprises two components of vertical compression and horizontal sliding. Most of the existing struts are unidirectionally yielding, cannot be subjected to decoupling treatment and compound deformation, and are easy to bend and fail. Based on the above, the invention provides an underground mining support device for preventing mine collapse. Disclosure of Invention The invention aims to provide an underground mining support device for preventing mine collapse, which solves the problems. In order to solve the technical problems, the invention adopts the following technical scheme: the invention discloses an underground mining support device for preventing mine collapse, which comprises lifting mechanisms symmetrically arranged on the left side and the right side of a roadway, wherein a footstock is arranged at the top of the lifting mechanisms, supporting units distributed along the circumferential direction of the roadway are arranged between the footstocks, each supporting unit comprises an inner-layer high-strength bearing pipe, a middle-layer gradient yielding pipe and a corrugated supporting pipe which are sequentially arranged from inside to outside, a plurality of buffer connectors and variable resistance nodes are equidistantly arranged between the inner-layer high-strength bearing pipe and the middle-layer gradient yielding pipe, a side wall laminating layer is arranged on one side, close to the roadway, of the lifting mechanisms, each side wall laminating layer comprises a plurality of laminating pipe installation structures distributed along the vertical direction, and laminating pipes are arranged in each laminating pipe installation structure. Furthermore, the corrugated supporting tube and the laminating tube are filled with high molecular water-absorbing expansion particles. Further, the buffer connectors and the variable resistance nodes are distributed in a staggered mode. Further, the buffer connecting piece comprises a sleeve, a telescopic rod is arranged in the sleeve in a sliding mode, a bottom plate is arranged at one end, away from the sleeve, of the telescopic rod, hinge holes are formed in the top of the sleeve and the bottom of the bottom plate in an integrated mode, the hinge holes are connected between the inner-layer high-strength bearing pipe and the middle-layer gradient yielding pipe in a hinged mode, external threads are formed in the outer side wall of the sleeve, an adjustable top plate is connected to the external threads in a threaded mode, and springs are sleeved on the sleeve between the adjustable top plate and the bottom plate. Further, the variable resistance node comprises symmetrically distributed lug plates integrally formed on the inner-layer high-strength bearing pipe, a hinge shaft is rotatably arranged between the lug plates, a barrel cam is arranged on the hinge shaft, a thread-shaped groove is formed in the barrel cam, a driven roller is slidably arranged in the groove, a limiting rod is integrally formed at one end, far away from the groove, of the driven roller, the limiting rod is arranged on the lug plate