【摘 要】
：
By the microseismic (MS) monitoring system of Sanhejian Coal Mine, the detailMS activity rules in the entire mining process of 9202 strong rockburst working face werestudied, following main conclusions were obtained. (1) The strong correlation between MSa
【机 构】
：
State Key Laboratory of Coal Resources and Mine Safety, China University of Mining and Technology, X
论文部分内容阅读
By the microseismic (MS) monitoring system of Sanhejian Coal Mine, the detailMS activity rules in the entire mining process of 9202 strong rockburst working face werestudied, following main conclusions were obtained. (1) The strong correlation between MSactivity and the region stress gradient was revealed. The higher the region stress gradient,the stronger the MS signal is, and the frequency-spectrum moves to lower frequency band,the amplitude begins to add gradually. (2) The different types of MS signals have the cor-responding frequency-spectrum character. Such as relieve-shot MS signal shows the widefrequency-spectrum, multi-peak high frequency character, while rockburst omen signalshows the low frequency and amplitude, the mainshock signal has relatively higher fre-quency and amplitude. (3) To monitor and recognize rockburst dangerous region, thestrong consistence between the MS signal intensity and the amplitude of electromagneticemission (EME) signal and drilling bits measured was observed. On above, the weakeningand controlling technology of MS intensity was put forward.
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