特厚煤层工作面末采期间防冲技术研究

Study on the Prevention and Control Technology of Rock Burst during the End Mining Period of Extra Thick Coal Seam Working Face

针对8301工作面末采期间工作面及下山巷道面临的冲击地压灾害,通过"理论-技术"相结合的冲击危险性评价方法,划分了冲击危险区域,采用顶板爆破、煤层大直径钻孔卸压及底板爆破等防冲措施对危险区域进行了治理,采用微震和应力监测手段对末采期间的冲击危险性进行了监测预警,并及时采取了卸压解危手段,保证了工作面安全开采。

In view of the rock burst disaster faced by the working face and the downhill roadway during the final mining period of 8301 working face,through the"theory technology"combined impact risk evaluation method,the impact risk area is divided,and the roof blasting,coal seam large diameter drilling pressure relief and floor blasting and other anti impact measures are adopted to control the risk area,Microseismic and stress monitoring methods were used to monitor and early warn the impact risk during the final mining period,and pressure relief measures were taken in time to ensure the safe mining of the working face.