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CN-122014131-A - Limiting device for limiting drilling depth of anchor rod in coal mine and using method

CN122014131ACN 122014131 ACN122014131 ACN 122014131ACN-122014131-A

Abstract

The invention relates to the technical field of coal mine anchor rod drilling, in particular to a limiting device for limiting the depth of an anchor rod drilling in a coal mine and a using method. The invention comprises a fixed frame, a sleeve, a movable plate and an adjusting mechanism, wherein the fixed frame comprises an upper fixed plate, a lower fixed plate and a plurality of threaded rods which are horizontally arranged, the two ends of each threaded rod are respectively and rotatably connected with the upper fixed plate and the lower fixed plate, the sleeve is vertically arranged between the upper fixed plate and the lower fixed plate, the bottom end of the sleeve is detachably arranged on the lower fixed plate, an anchor rod can be inserted into the sleeve and is in threaded connection with the sleeve, the adjusting mechanism is arranged in the upper fixed plate and is respectively connected with the threaded rods, the movable plate is in threaded connection with the threaded rods, and the top end of the sleeve is flush with the top surface of the movable plate or is arranged in the movable plate. The adjusting mechanism can drive the plurality of threaded rods to synchronously rotate so as to accurately adjust the distance between the movable plate and the lower fixed plate, and achieve the effect of limiting the drilling depth of the anchor rod.

Inventors

  • ZHANG JIANXIN
  • DENG LEI
  • MIAO YINAN

Assignees

  • 扎赉诺尔煤业有限责任公司

Dates

Publication Date
20260512
Application Date
20260228

Claims (10)

  1. 1. The limiting device for limiting the drilling depth of the anchor rod in the coal mine is characterized by comprising a fixed frame (1), a sleeve (2), a movable plate (3) and an adjusting mechanism (4); The fixing frame (1) comprises an upper fixing plate (11), a lower fixing plate (12) and a plurality of vertically arranged threaded rods (13), wherein the upper fixing plate (11) and the lower fixing plate (12) are horizontally arranged, two ends of each threaded rod (13) are respectively and rotatably connected with the upper fixing plate (11) and the lower fixing plate (12), the sleeve (2) is vertically arranged between the upper fixing plate (11) and the lower fixing plate (12), the bottom end of the sleeve (2) is detachably arranged on the lower fixing plate (12), the anchor rod (5) can be inserted into the sleeve (2) and is in threaded connection with the sleeve (2), and the anchor rod (5) and the sleeve (2) are always coaxial so as to limit the drilling direction of the anchor rod (5); Adjustment mechanism (4) are installed in last fixed plate (11) to be connected with a plurality of threaded rods (13) respectively, fly leaf (3) and a plurality of threaded rods (13) spiro union, outside sleeve (2) are located to fly leaf (3) cover, the top of sleeve (2) flushes or arranges in fly leaf (3) with the top surface of fly leaf (3), adjustment mechanism (4) can drive a plurality of threaded rods (13) synchronous rotation, so that fly leaf (3) can follow threaded rod (13) axis and remove, the top surface butt of fixed plate (11) and fly leaf (3) can be passed to the one end of keeping away from of lower fixed plate (12) of stock (5).
  2. 2. A stop device for limiting the depth of a drilled hole in a rock bolt in a coal mine as claimed in claim 1, wherein: the adjusting mechanism (4) comprises a driving gear (41), an output rod (42), a chain (43) and a plurality of driven gears (44); An installation space (111) is formed in the upper fixing plate (11), a driving gear (41), a chain (43) and a plurality of driven gears (44) are horizontally arranged in the installation space (111), and the top ends of a plurality of threaded rods (13) are penetrated through the upper fixing plate (11) and are arranged in the installation space (111); The driving gear (41) is fixedly connected with the top end of one threaded rod (13), the top ends of the other threaded rods (13) are respectively connected with a plurality of driven gears (44) in a one-to-one correspondence manner, the output rod (42) comprises a mounting end and an output end, the mounting end of the output rod (42) penetrates through the upper fixing plate (11) to be fixedly connected with one end, far away from the threaded rod (13), of the driving gear (41), the output end of the output rod (42) is used for driving a driving piece, and the chain (43) is sleeved on the driving gear (41) and the driven gears (44) and meshed with the driving gear; the driving piece can drive the driving gear (41) to rotate through the output rod (42) so as to drive the driven gears (44) to rotate simultaneously through the chain (43), and therefore the threaded rods (13) are driven to rotate synchronously.
  3. 3. A stop device for limiting the depth of a drilled hole in a rock bolt in a coal mine as claimed in claim 1, wherein: The limiting device further comprises a scale plate (6), and the scale plate (6) is vertically and fixedly arranged on the same side wall of the upper fixing plate (11) and the lower fixing plate (12).
  4. 4. A stop device for limiting the depth of a drilled hole in a rock bolt in a coal mine as claimed in claim 1, wherein: the sleeve (2) comprises a sleeve body (21) and a plurality of limit strips (22); the sleeve body (21) is vertically provided with internal threads, and a plurality of limit strips (22) are vertically and fixedly arranged on the outer wall of the sleeve body (21) in a circumferential arrangement around the axis of the sleeve body (21); the movable plate (3) is provided with a limiting hole (31), and the inner contour of the limiting hole (31) is consistent with the outer contour of the sleeve (2) so as to limit the vertical moving direction of the movable plate (3).
  5. 5. The device for limiting the depth of a drilled hole of an anchor rod in a coal mine as set forth in claim 4, wherein: the top surface of the lower fixing plate (12) is provided with a slot (121) consistent with the outer contour of the sleeve (2), the bottom end of the sleeve (2) is inserted into the slot (121), and the sleeve (2) can be locked in the slot (121) through a locking device.
  6. 6. The device for limiting the depth of a drilled hole of an anchor rod in a coal mine as set forth in claim 5, wherein: The locking device comprises a plurality of locking mechanisms (7); the locking mechanisms (7) are horizontally arranged on the lower fixing plate (12) in a penetrating mode and can be respectively connected with the limiting strips (22) in a one-to-one correspondence mode to lock the sleeve (2).
  7. 7. The device for limiting the depth of a drilled hole of an anchor rod in a coal mine as set forth in claim 6, wherein: the locking mechanism (7) comprises a locking rod (71), an elastic piece (72), a fixed ring (73) and a pull ring (74); An inserting hole (221) is formed in the outer wall, far away from the sleeve body (21), of the inserting groove (121) of the limiting strip (22), one end of the locking rod (71) horizontally penetrates through the lower fixing plate (12) and can be inserted into the inserting hole (221) so as to lock the sleeve (2), and the other end of the locking rod (71) is arranged outside and fixedly connected with the pull ring (74); An elastic space (122) is formed in the lower fixing plate (12), the locking rod (71) penetrates through the elastic space (122), the elastic piece (72) and the fixing ring (73) are arranged in the elastic space (122), the fixing ring (73) is fixedly sleeved on the outer wall of the locking rod (71), and one side, facing the limiting strip (22), of the fixing ring (73) can be abutted with the inner wall, close to the limiting strip (22), of the elastic space (122); The elastic piece (72) is sleeved on the locking rod (71), and two ends of the elastic piece (72) are respectively abutted with one side, far away from the limit strip (22), of the fixed ring (73) and the inner wall, far away from the limit strip (22), of the elastic space (122) so as to provide buffer force and resilience force for the fixed ring (73) and the locking rod (71).
  8. 8. A stop device for limiting the depth of a drilled hole in a rock bolt in a coal mine as claimed in claim 1, wherein: the limiting device also comprises a buffer cushion (8); the cushion pad (8) is horizontally stuck on the bottom surface of the lower fixing plate (12), and the bottom surface of the cushion pad (8) is provided with anti-skid patterns.
  9. 9. A stop device for limiting the depth of a drilled hole in a rock bolt in a coal mine as claimed in claim 1, wherein: the anchor rod (5) comprises an anchor rod body (51), a drill bit (52) and a connecting plate (53), wherein the drill bit (52) is detachably connected with the bottom end of the anchor rod body (51), the connecting plate (53) is fixedly connected with the top end of the anchor rod body (51), and the connecting plate (53) is rectangular and horizontally arranged; the upper fixing plate (11) is provided with an avoidance hole (112), the avoidance hole (112) is circular, and the diameter of the avoidance hole (112) is larger than the diagonal distance of the connecting plate (53).
  10. 10. A method of using a spacing device according to any one of claims 1 to 9, comprising the steps of: S1, an adjusting mechanism (4) drives a plurality of threaded rods (13) to synchronously rotate so as to drive a movable plate (3) to vertically move along the axis of the threaded rods (13) to move the movable plate (3) to a designated position; S2, the matched sleeve (2) is installed on the lower fixed plate (12) through the movable plate (3) in a selected mode, and the top end of the sleeve (2) is flush with the top surface of the movable plate (3); S3, enabling the anchor rod (5) to pass through the upper fixing plate (11) and be in threaded connection with the internal thread of the sleeve (2); And S4, the bottom surface of the lower fixed plate (12) is propped against the target position, the anchor rod (5) is driven to rotate, the anchor rod (5) moves towards the target position, and the target position is drilled until one end, far away from the lower fixed plate (12), of the anchor rod (5) is propped against the top surface of the movable plate (3).

Description

Limiting device for limiting drilling depth of anchor rod in coal mine and using method Technical Field The invention relates to the technical field of coal mine anchor rod drilling, in particular to a limiting device for limiting the depth of an anchor rod drilling in a coal mine and a using method. Background The anchor rod is one of the most basic and core components in the current coal mine roadway support system, and the action mechanism is to integrate roadway surrounding rocks, so that the surrounding rocks realize self-bearing and stability by means of the self structure. Along with the continuous expansion of application scenes, the anchor rod is extended from mine engineering to various geotechnical engineering fields, and is widely applied to main structure reinforcement engineering such as side slope reinforcement, tunnel support and dam protection. The anchor rod is used as a tension member penetrating into the stratum, one end of the anchor rod is connected with the engineering structure, the other end of the anchor rod is anchored in the stratum, and the whole structure is mainly divided into a free section and an anchoring section. The function of the free section is to transfer the tensile force of the end part of the anchor rod to the anchoring body, and the free section is mainly used for applying prestress to the anchor rod so as to improve the overall stability of the supporting structure. According to the 39 rd requirement of the 'coal roadway anchor bolt support management regulation', the drilling depth of the anchor bolt construction must strictly meet the design standard, and the drilling depth error should be controlled within the range of 0-50 mm. In the underground tunneling operation process, the drilling depth of the anchor rod is difficult to accurately control, the installation quality of the anchor rod is directly determined by the drilling depth, and the problems that the exposed length is overlong or the exposed length is insufficient after the anchor rod is installed are easily caused. According to the regulations of tunneling operation, the exposed length of the anchor rod is controlled to be between 10mm and 50 mm. When the exposed length exceeds 50mm, the bolt must be readdressed. When the exposed length is insufficient, the air pick is needed to trim the coal rock wall, and the construction requirement can be met after the fastening is processed again. However, the traditional anchor rod lacks an effective limit structure in drilling construction, so that an operator is difficult to accurately control the drilling depth, and the exposed length of the anchor rod after installation cannot be accurately controlled. Meanwhile, hole site deflection, drilling direction deviation and the like are easy to occur in the drilling process, so that the installation quality of the anchor rod is affected, and the site construction efficiency is reduced. Disclosure of Invention First, the technical problem to be solved In view of the defects and shortcomings of the prior art, the invention provides a limiting device for limiting the drilling depth of an anchor rod in a coal mine and a use method thereof, and solves the technical problems that the drilling depth cannot be accurately controlled in the drilling process of the traditional anchor rod, the drilling is easy to deviate, and the supporting quality and the construction efficiency are affected. (II) technical scheme In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps: The invention provides a limiting device for limiting the drilling depth of an anchor rod in a coal mine, which comprises a fixed frame, a sleeve, a movable plate and an adjusting mechanism, wherein the fixed frame comprises an upper fixed plate, a lower fixed plate and a plurality of vertically arranged threaded rods, the upper fixed plate and the lower fixed plate are horizontally arranged, two ends of each threaded rod are respectively and rotatably connected with the upper fixed plate and the lower fixed plate, the sleeve is vertically arranged between the upper fixed plate and the lower fixed plate, the bottom end of the sleeve is detachably arranged on the lower fixed plate, the anchor rod can be inserted into the sleeve and is in threaded connection with the sleeve, the anchor rod is always coaxial with the sleeve so as to limit the drilling direction of the anchor rod, the adjusting mechanism is arranged in the upper fixed plate and is respectively connected with a plurality of threaded rods, the movable plate is in threaded connection with the threaded rods, the top end of the sleeve is flush with the top surface of the movable plate or is arranged in the movable plate, the adjusting mechanism can drive the threaded rods to synchronously rotate, so that the movable plate can move along the axis of the threaded rods, and one end of the anchor rod, which is far away from the lower fixed pl