Method for detecting radial water cut abnormal body in underground coal mine drilled hole

Abstract

A method for detecting a radial water cut abnormal body in an underground coal mine drilled hole comprises the following steps that firstly, a detection hole is drilled in a roadway under the shaft , an emission wire frame is arranged at the position of a hole opening of the detection hole, and an emission receiving device is arranged; secondly, a three-component receiving probe in the detection hole is fixed in a plurality of design measuring points according to the same angle, and meanwhile an inclination measuring device is utilized for recording direction angles, inclined angles and transverse rolling angles of the positions of the measuring points; thirdly, measuring information of all measuring points is respectively recorded, and an abnormal response is judged; fourthly, the position of an emission device is moved, or the angle of the emission device is changed, and the second step and the third step are repeated; fifthly, collected data are processed, and information of the position of the low-resistance abnormal body around the drilled hole is obtained. According to the method, the positioning function of the low-resistance abnormal body in the radial direction of the drilled hole can be provided, the control range of the drilled hole is expanded, the head-on advanced detection precision of the roadway is enhanced, a water contained construction object existing possibly can be pointed out, and the next-step drilling direction can be pointed out.

Description

technical field [0001] The invention relates to the technical field of physical exploration of coal mine mining, in particular to a method for detecting radial water-containing abnormal bodies in underground coal mine boreholes using artificial source time-domain electromagnetic induction in underground mine boreholes. Background technique [0002] At present, with the continuous increase of coal mine mining depth, the advanced detection of water-bearing structures is of great significance to the safe production of coal mines. Because coal mine excavation needs to drill a large number of advanced water exploration drilling holes, in order to control the range of water-bearing structures, the density of water exploration holes is very high, sometimes as many as 20 or more, which takes a lot of time and cost. [0003] The artificial source time-domain electromagnetic induction method uses ungrounded loops or ground electrodes to send pulsed or square wave primary electromagnet...

AI Technical Summary

Problems solved by technology

Because coal mine excavation needs to drill a large number of advanced water-exploration drilling holes, in order to control the range of water-bearing structures, the density of water-exploration holes is very high, sometimes as many as 20 or more, which consumes a lot of time and cost

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