Rock burst coal rock stratum drilling deformation monitoring device

Abstract

The invention provides a rock burst coal rock stratum drilling deformation monitoring device. The rock burst coal rock stratum drilling deformation monitoring device mainly comprises a hole distance rod and a measuring module. The pitch rod is composed of a round hard metal tube and a square hard metal tube, and the square hard metal tube is arranged in the round hard metal tube. Each measuring module is composed of a positioning nut, a dowel bar, a metal shell, a positioning metal sheet, a high-compression-degree spring, a strain gauge, a metal coil and a one-way snap spring, four measuring modules form a group and are uniformly arranged along the circumferential direction of the pitch rod, and a plurality of groups of measuring modules are distributed along the length direction of the pitch rod; the front surface of the positioning nut is arc-shaped, extends out of the metal shell and is screwed with the top end of the dowel bar; the dowel bar penetrates through a round hole in the metal shell to be mounted; one end of the high-compression-degree spring is fixedly connected with a circular ring in the metal shell, and the other end of the high-compression-degree spring abuts against the metal protrusion of the dowel bar body; the strain gauge is adhered to the inner arc surface of the positioning metal sheet and is electrically connected with a strain gauge outside the drill hole through a wire; the top of the metal coil is hinged to the high-compression-degree spring, and the bottom of the metal coil is wound on the square hard metal pipe of the pitch rod. The one-way clamp spring is installed at the bottom of the dowel bar and penetrates through the positioning metal sheet, and the top end of the one-way clamp spring abuts against the interior of the positioning metal sheet. The device is simple in structure, good in economical efficiency and high in adaptability, and meets the requirement for rock burst coal rock stratum drilling deformation monitoring.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety monitoring, and in particular relates to a device for monitoring the deformation of boreholes in rock-burst coal strata. Background technique [0002] Coal is my country's main energy source and an important industrial raw material, and is the cornerstone of my country's energy security. In the future, the development of coal resources will fully enter the depth of 1000-2000m (about 53% of the coal resources are buried deeper than 1000m). Rock deformation is severe, and rock burst has become the first major disaster in many mining areas. Anhui, Jiangsu, Henan, Shandong, Hebei, Liaoning, Jilin, Heilongjiang and other key coal mining provinces in the central and eastern regions have fully entered deep mining; Xinjiang, Gansu, Shaanxi, Inner Mongolia and other western provinces will also gradually enter deep mining. It can be foreseen that the problem of rock burst disasters and a series o...

AI Technical Summary

Problems solved by technology

However, the existing monitoring instruments generally have the disadvantages of complex structure and poor adaptability

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