Coal seam outburst danger testing while drilling method and device

Abstract

The invention provides a coal seam outburst danger testing while drilling method and device. The coal seam outburst danger testing while drilling method and device are applicable to outburst danger predication, methane gas extraction and exploitation effect evaluation and the like. By drilling a coal seam and testing methane gas parameters while drilling, lithology and coal seam information while drilling in real time, a test while drilling and grounding of the coal seam outburst danger is achieved. The device comprises a cabin body, a pressure sensor, a temperature sensor, a flow sensor, an electromagnetism sensor, an ultrasonic wave sensor, a wave velocity testing module, a monitoring control module, a power source module and a communication module and is installed between a drill and an inclinometer while drilling or a first drill rod. In the period when the coal seam is drilled or drilling is stopped for replacing the drill, the gas pressure, the temperature, the flow speed, the coal body wave velocity, the electromagnetic radiation and an ultrasonic wave signal on a testing point can be monitored and recorded in real time, and the methane gas pressure, the methane gas content, the initial desorbed methane gas content, the medium lithology, the wave speed, the coal body stress and the coal seam outburst danger on the testing point are analyzed and calculated. The coal seam outburst danger testing while drilling method and device have the advantages of being free of sampling tests and achieving testing while drilling and grounding, multi-parameter synchronous comprehensive evaluation and the like.

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.

Images