科研之友
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摘要
As the mining depth increases, the rock burst is getting more and more hazardous. How to make early warning for rock burst validly is, an urgent work. In this article, rock burst and AE portern towed by three types of strata-activation: brittle-thick-hard roof flexible-thick-hard roof and fault activation, were investigated. (a) For the case of brittle-thick-hard roof the interval from fracturing to weighting is short, the released energy monitored by AE is synchronous. It is difficult to make some: early warning for severe rock burst induced by sudden roof woofing, by using AE monitoring technique, (b), for the case of flexible, thick-hard roof, the roof weighting appears periodically, which can be taken as an indicator of medium and long-term early warning for rock burst; the AE events of low energy within silent-time can be used to make short-term early warning for rock burst, (c) For the case of fault, when coal face advances to the vicinity of fault, the fault begins. to act and the energy of AE event becomes larger and larger and the early warning for rock burst Mould be made immediately..
- 出版日期2011-10
- 单位山东科技大学
