摘要
冲击地压工作面广泛采用煤层预注水防治措施,引起煤层含水率的增大,直接影响了冲击危险性判定过程中的钻屑量指标。以千秋煤矿21141工作面为例,阐述了利用钻屑法进行冲击危险性监测及等级划分的方法。基于煤样吸水率、含水率测试数据,对注水区域正常煤粉量进行了优化,并将优化结果应用于现场实际监测,监测效果良好。
Water pre -injection control measure in coal seam is widely adopted at rock burst working faces, which causes the increase of water content in coal seam, and directly affects the amount of drilling cuttings weight in the decision process of rock burst hazard. Taking the 21141 working face in Qianqiu Coal Mine as an example, the method of using drilling bits way to monitor rock burst hazard and divide grade is described. Based on the test data of water absorption and content of coal sample, normal quantity of dust coal at wa- ter pre -injection area is optimized. The optimization results are applied to the actual monitoring, which shows good results.
出处
《煤矿安全》
CAS
北大核心
2013年第5期174-176,共3页
Safety in Coal Mines
关键词
冲击地压
钻屑法
吸水率
含水率
注水工作面
rock burst
method of drilling bits
water absorption
water content
water pre - injection working face
