University of Science and Technology Beijing

Zhong-an Academy of Safety Engineering

Donghui Li

Dazhao Song

Xueqiu He

Zhenlei Li

Shengquan He

A monitoring and forewarning method for coal-rock dynamic disasters based on an electromagnetic radiation and an earth-sound monitoring includes the following steps: (1) calculating the weighted average value of research parameter P(t) during a time period according to the monitoring data collected by the electromagnetic radiation and the earth-sound monitoring system in real time; (2) calculating D(t), the deviation value of P(t); (3) calculatingas the deviation threshold value, the average value of |D(t)| during period of normal mining of the working surface; (4) calculating D, the number of times that D(t) is greater thanin one day; (5) normalizing Dto obtain the monitoring and forewarning index &#x3b5;; (6) forewarning the hazard state of dynamic disaster of the working surface in real time according to &#x3b5; and forewarning method, determining hazard level.

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Beijing, China

Donghui Li