Method for installing acoustic emission sensor on mine

Abstract

The invention discloses a method for installing an acoustic emission sensor on a mine, and belongs to the technical field of acoustic emission monitoring of a mine coal-rock mass. The method for installing the acoustic emission sensor on the mine comprises the following steps of (1) carrying out drilling on a mine coal-rock stratum according to the requirement of the design and construction; (2) conveying the sensor to the bottom of a hole through a conveying pipe to enable the acoustic emission sensor and the hole wall of the drilled hole to be in tight coupling contact, wherein the acoustic emission sensor comprises a signal line, an outer shell, an acoustic emission signal receiver and clamping jaws; (3) pulling the conveying pipe out, enabling the clamping jaws of the acoustic emission sensor to clamp the hole wall of the drilled hole so that the acoustic emission sensor cannot slide off, and arranging a signal circuit of the acoustic emission sensor; (4) using mining hole sealing agents to block the hole opening of the drilled hole to isolate interference noise of the outside world. According to the method for installing the acoustic emission sensor on the mine, due to the fact that the acoustic emission sensor is embedded into the rock mass in a drilling mode, interference caused by the noise of the outside world on real-time monitoring is avoided, and monitoring precision is improved; due to the fact that the clamping jaws are fixedly arranged in the drilled hole, the acoustic emission sensor and the rock mass of the mine are tightly coupled, and the problems that grouting is tedious and whether grouting is in place or not cannot be easily judged are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of acoustic emission monitoring of coal and rock mass in mines, and relates to a method for installing acoustic emission sensors in mines. Background technique [0002] In recent years, with the continuous increase of mining depth and mining intensity, the pressure of deep-level mines has become increasingly apparent, and coal-rock dynamic phenomena or disasters have become increasingly prominent. Moreover, the conventional inspection indicators currently used such as the initial velocity q of gas gushing out and the amount of drilling cuttings S are often insensitive or relatively ineffective, and cannot effectively guide the mining of the working face and completely prevent the occurrence of gas disasters. The acoustic emission online monitoring system can realize real-time online monitoring of coal-rock dynamic disasters in the working face, capture the precursory information of dynamic disasters, and rea...

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Problems solved by technology

[0003] Since the prior art solution cannot prevent the sensor from slipping in the drilling hole and the interference of the external noise on the acoustic emission sensor during the installation process, and the operation is relatively cumbersome, a large monitoring error will be generated, thereby affecting the monitoring effect

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