Method and device for testing the danger of coal seam outburst while drilling

Abstract

A coal seam outburst risk-while-drilling test method and device are applicable to outburst risk prediction, gas drainage effect evaluation, and the like. By drilling the coal seam and testing the gas parameters, lithology and coal seam information in real time while drilling, the outburst risk of the coal seam can be tested anywhere while drilling. The device includes cabin body, pressure sensor, temperature sensor, flow sensor, electromagnetic sensor, acoustic wave sensor, wave velocity test module, monitoring control module, power supply module and communication module, and is installed between the drill bit and the inclinometer while drilling or the first drill pipe. between. During coal seam drilling and stop drilling to replace drill bits, real-time monitoring and recording of gas pressure, temperature, flow velocity, coal body wave velocity, electromagnetic radiation, and sound wave signals at the measuring point, analysis and calculation of gas pressure, gas content, and initial desorption gas amount at the measuring point , medium lithology, wave velocity, coal body stress and coal seam outburst risk. It has the advantages of no-sampling test, anywhere-while-drilling test, multi-parameter synchronous test comprehensive evaluation, etc.

Description

technical field [0001] The invention relates to a method and device for testing the risk of coal seam outburst, in particular to a method and device for testing the risk of coal seam outburst while drilling, belonging to the fields of coal mining and coal mine safety. Background technique [0002] Deep coal seam mining is facing the threat of high gas, coal and gas outburst (hereinafter referred to as outburst). More than 50% of the mines in the former state-owned key coal mines in my country are affected by this, and with the increase of mining depth, the ground stress and gas pressure increase , highlighting the increasingly serious and complex risks. The outburst risk identification, regional risk detection, regional risk prediction, working face outburst risk forecast and outburst prevention measure effect inspection need to test and analyze the coal seam outburst risk. At present, coal seam outburst risk identification, detection and regional prediction, and regional ou...

AI Technical Summary

Problems solved by technology

[0004] Technical problem: The present invention is aimed at the demand and the problems existing in the prior art, and provides a device and method capable of testing the risk of coal seam outburst while drilling, real-time, and on-site, so as to solve the problem that there are few gas parameter test points and data, and the test There are few indicators, coal seam gas parameters and outburst risks cannot be tested while drilling, on-site, and in real time, and coal seam outburst risk tests take a long time and the process is complicated, etc.

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