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CN-224230956-U - Device for measuring moving amount of roof and floor of coal mine tunnel

CN224230956UCN 224230956 UCN224230956 UCN 224230956UCN-224230956-U

Abstract

The utility model relates to a measuring device for the moving-in amount of a top and bottom plate of a coal mine tunnel, a sky leg arranged at the top of the tunnel, a foot leg arranged at the bottom of the tunnel, a telescopic rod for connecting the sky leg with the foot leg and a pull rope sensor with a pull rope, wherein the telescopic rod comprises an inner rod connected with the sky leg and a sleeve rod connected with the foot leg, one end of the inner rod is slidably penetrated in the sleeve rod, one end of the pull rope penetrates and is fixed in the inner rod, and when the inner rod is driven to slide relative to the sleeve rod, the pull rope sensor measures the stretching length of the pull rope. According to the device for measuring the moving amount of the top and bottom plates of the coal mine tunnel, disclosed by the utility model, the top and the bottom of the tunnel are connected through the telescopic rod, and the stretching length of the pull rope is accurately measured through the sensor with the pull rope, so that the moving amount of the top and bottom plates is accurately reflected.

Inventors

  • Bai Fengliang
  • LIU YALIN
  • LI XIAOLE

Assignees

  • 中矿众合(河北)矿山科技有限公司

Dates

Publication Date
20260512
Application Date
20250605

Claims (9)

  1. 1. The device for measuring the moving-in amount of the coal mine tunnel roof and floor is characterized by comprising a roof leg (1) arranged at the top of the tunnel, a foot leg (2) arranged at the bottom of the tunnel, a telescopic rod (3) for connecting the roof leg (1) and the foot leg (2) and a pull rope sensor (5) with a pull rope (51); The telescopic rod (3) comprises an inner rod (31) connected with the heel (1) and a loop bar (32) connected with the foot (2), one end of the inner rod (31) is slidably arranged in the loop bar (32) in a penetrating mode, one end of the pull rope (51) penetrates into and is fixed in the inner rod (31), and when the inner rod (31) is driven to slide relative to the loop bar (32), the pull rope sensor (5) measures the stretching length of the pull rope (51).
  2. 2. The device for measuring the movement of the roof and the floor of the coal mine tunnel according to claim 1, wherein the telescopic rod (3) is provided with a limiting structure for preventing the inner rod (31) from falling off.
  3. 3. The device for measuring the moving amount of the roof and the floor of the coal mine tunnel according to claim 2, wherein the limiting structure comprises a sliding groove (311) extending along the length direction of the inner rod (31), and a limiting bolt (4) arranged on the sleeve rod (32), the limiting bolt (4) is arranged on the pipe wall of the sleeve rod (32) along the length direction perpendicular to the inner rod (31), and the main body of the limiting bolt (4) is slidably arranged in the sliding groove (311).
  4. 4. A coal mine tunnel roof and floor movement measuring device according to claim 3, characterized in that the limit bolts (4) are arranged in a plurality at intervals along the length direction of the loop bar (32).
  5. 5. A coal mine tunnel roof and floor movement measuring device according to claim 1, characterized in that one end of the inner rod (31) far from the loop bar (32) is provided with a guide tube (33) for the pull rope (51) to penetrate, and a fixing column (34) for fixing the pull rope (51) is provided at the other end of the inner rod (31) along a length direction perpendicular to itself.
  6. 6. The device for measuring the moving-in amount of the roof and the floor of the coal mine tunnel according to claim 1, wherein a return spring (6) for sliding and resetting the inner rod (31) is arranged in the sleeve rod (32), one end of the return spring (6) is fixedly arranged in the sleeve rod (32), and the other end of the return spring (6) is connected with the inner rod (31).
  7. 7. A coal mine roof and floor movement measuring device according to any one of claims 1 to 6, characterised in that the measuring device further comprises an adjustment assembly (7) connected to the telescopic rod (3).
  8. 8. The device for measuring the moving-in amount of the roof and the floor of the coal mine tunnel according to claim 7, wherein the adjusting assembly (7) comprises an adjusting outer tube (72) and an adjusting inner tube (71) which are connected in a threaded manner, one end of the adjusting outer tube (72) is connected with the ground leg (2), and one end of the adjusting inner tube (71) is connected with the telescopic rod (3) in a threaded manner.
  9. 9. The coal mine tunnel roof and floor movement measuring device according to claim 8, wherein a fixing rod (8) is further arranged between the adjusting inner tube (71) and the telescopic rod (3).

Description

Device for measuring moving amount of roof and floor of coal mine tunnel Technical Field The utility model relates to the technical field of coal mine measuring devices, in particular to a device for measuring the moving-in amount of a top plate and a bottom plate of a coal mine tunnel. Background In the coal mining process, the stability of a roadway is important to mine safety. The approaching amount of the top plate and the bottom plate is one of important indexes for measuring the stability of the roadway, and reflects the change condition of the relative displacement between the top plate and the bottom plate. The accurate measurement of the approaching amount of the top plate and the bottom plate has important significance for timely finding roadway deformation, preventing roof caving accidents and optimizing support design. However, the existing device for measuring the displacement of the top and bottom plates has a plurality of problems in practical application. On the one hand, the measuring range of the traditional measuring device is usually fixed, and can not be flexibly adjusted according to the actual deformation condition of the roadway. For example, in some less deformed lanes, a fixed-range device may not accurately measure a small amount of displacement, while in more deformed lanes, a large displacement of the top and bottom plates may not be effectively monitored due to insufficient ranges. The lack of adjustability of this range limits the applicability of the device, making it impractical for use in roadways of different geological conditions and mining stages. On the other hand, the operation mode of the existing measuring device is complex, and the manual periodic reading and recording are usually needed, so that time and labor are wasted, and measurement errors are easily caused by human factors. In addition, the traditional device lacks intelligent function, can not transmit and analyze measurement data in real time, and is difficult to meet the requirement of modern mines on automatic monitoring. In the coal mining process, roadway deformation is a dynamic change process, and real-time data monitoring is needed to take measures in time. These shortcomings of conventional devices severely affect the efficiency and accuracy of roadway safety monitoring. Disclosure of utility model The utility model aims to provide a device for measuring the movement of a top plate and a bottom plate of a coal mine tunnel, which is convenient to use. The technical scheme adopted by the utility model is that the device for measuring the movement of the top and bottom plates of the coal mine tunnel comprises a sky leg arranged at the top of the tunnel, a foot leg arranged at the bottom of the tunnel, a telescopic rod connecting the sky leg and the foot leg and a sensor with a pull rope; The telescopic rod comprises an inner rod connected with the heel, and a loop bar connected with the foot margin, one end of the inner rod is slidably penetrated in the loop bar, one end of the pull rope penetrates into and is fixed in the inner rod, and the sensor measures the stretching length of the pull rope when the inner rod is driven to slide relative to the loop bar. Further, the telescopic rod is provided with a limiting structure for preventing the inner rod from falling off. Further, the limit structure comprises a sliding groove extending along the length direction of the inner rod and a limit bolt arranged on the loop bar, wherein the limit bolt is arranged on the pipe wall of the loop bar along the length direction perpendicular to the inner rod, and the main body of the limit bolt is slidably arranged in the sliding groove. Further, the limit bolts are arranged at intervals along the length direction of the sleeve rod. Further, one end of the inner rod, which is far away from the loop bar, is provided with a guide pipe for the pull rope to penetrate, and the other end of the inner rod is provided with a fixing column for fixing the pull rope along the length direction perpendicular to the inner rod. Further, a reset spring for sliding and resetting the inner rod is arranged in the loop bar, one end of the reset spring is fixedly arranged in the loop bar, and the other end of the reset spring is connected with the inner rod. Further, the measuring device is characterized by further comprising an adjusting assembly connected with the telescopic rod. Further, the adjusting assembly comprises an adjusting outer pipe and an adjusting inner pipe which are connected in a threaded mode, one end of the adjusting outer pipe is connected with the foundation, and one end of the adjusting inner pipe is connected with the telescopic rod in a threaded mode. Further, a fixing rod is further arranged between the adjusting inner tube and the telescopic rod. The device for measuring the movement amount of the top and bottom plates of the coal mine tunnel has the beneficial effects that: Compared with the prior art, the dev