The stress drop and acoustic emission change sharply before and after the burst in the borehole.
在临界压力附近，钻孔冲击前后的应力降及声发射急剧增加。
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The software RFPA is used to simulate the borehole burst, validate critical pressure, and research the stress drop and acoustic emission before and after occurring the burst in the borehole.
On the basis of Maxwell's equations, the propagation rule of EME (electromagnetic emission) radiated from coal or rock in the course of rock-burst is studied and analyzed theoretically.