微震事件与推进速度控制研究
Control Research on Advance Velocity and Microseismic Events
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摘要: 根据济三煤矿163下05工作面回采期间的微震事件、矿压显现程度以及钻屑法监测结果,指出了推进速度的变化可以在一定程度上影响工作面周围震动能量的释放过程,当工作面每日推进度为4.8～5.6 m,每日震动次数较少、震动能量都较低。通过分析工作面回采进尺与冲击矿压发生之间的关系,找出两者之间的相互作用,并对微震事件的发生与推进速度的关系进行研究,以期在达到预防冲击矿压灾害事故的基础上,确定工作面合理的推进速度,并提出以回采进尺为标准之一的冲击矿压防范标准,可在后期同水平同采区内的工作面生产阶段起到指导作用,为矿井的安全生产提供有力保障。Abstract: According to the microseismic events, the degree of strata behaviors and the monitoring results of drilling method in the stoping period of Jining No. 3 coal mine 163 under 05 working face, this paper points out that the changes of advance velocity can affect the releasing process of vibration energy around the face to some extent. The number of daily vibration is smaller and vibration energy is lower when the daily progress of propulsion in the working face is 4.8 to 5.6 m. This paper also tries to discover the interactions between the footage of stoping face and rockburst by analyzing their relationships, and studies on the relationships between the occurring of microseismic events and advance velocity, on the basis of preventing rockburst disasters, determines the reasonable advance velocity of face and proposes a standard to prevent rockburst, which treats footage of stoping as one of the standards. Thus it can give guidelines to the later production phase of working face in the same level and same mining district and provide guarantees to make sure the production safety of coal mine.
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Keywords:
- microseismic event /
- advance velocity /
- rockburst /
- the standard of footage /
- control research
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