Mining coal and rock mass water inrush slight shock monitoring method

Abstract

The invention particularly relates to a mining coal and rock mass water inrush slight shock monitoring method, which comprises the following steps of determining a mining coal and rock mass water inrush slight shock monitoring system architecture according to the engineering requirements and the implementation conditions of a mining coal and rock mass water inrush slight shock monitoring system; for slight shock signals picked up by a detector array, judging whether a mining coal and rock mass water inrush slight shock triggering event exists or not by a threshold value algorithm and a STA / LTA, and if so, storing the waveform of the triggering event; picking up the p wave arrival time t by the STA / LTA, and solving the occurring position of the triggering event through simplex method iteration; calculating the slight shock radiation energy during the occurrence of the triggering event; analyzing the space-time distribution features and the aggregation degree of mining coal and rock mass slight shock radiation energy, and setting the slight shock radiation energy release threshold value so as to identify the potential water inrush disaster region of the coal and rock mass. The method adopting the technical scheme has the advantages that the overall, real-time and dynamic monitoring on the mining coal and rock mass water inrush can be realized; the monitoring method is simple; the mining efficiency is high; the popularization and the implementation are convenient.

Description

technical field [0001] The invention relates to the technical field of mine hydrogeology, in particular to a microseismic monitoring method for water inrush in coal and rock mass. Background technique [0002] In the process of coal mining, accidents of water inrush and flooding of coal and rock mass occur from time to time, which seriously threaten the safe production of coal mines. Especially in recent years, the depth of mine mining has reached 1,000 meters, and the problem of water inrush from mining coal and rock mass has become more prominent. Different geological occurrence environments, rock properties, in-situ stress distributions, fault structures, and development of fractured zones during coal mining may induce mine water inrush with different mechanisms. Therefore, water inrush in mining coal and rock mass is caused by the joint action of many factors. For the monitoring of water inrush disasters, it is necessary to comprehensively consider the influence of vari...

AI Technical Summary

Problems solved by technology

In recent years, geophysical detection technology methods represented by geological radar technology, resistivity method, transient electromagnetic method and infrared detection method have been developed rapidly. These monitoring technologies can better obtain potential water inrush points on the coal seam floor. and water inrush channels, but these monitoring results often only obtain partial results at a certain static moment in the whole process of mining coal and rock mass water inrush, and fail to realize the continuous dynamic monitoring of the formation of water inrush channels in the whole process of water inrush. Moreover, the electromagnetic signal interference in the monitoring environment is greatly affected, and the reliability of the monitoring results is not high, which restricts the development of monitoring and early warning technology for water inrush in mining coal and rock mass

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