摘要
为了判定冲击地压的危险性,以鲍店煤矿为例,通过现场进行监测,对冲击地压进行了详细的危险性评估,并提出防冲措施及解危效果检验。受煤层的冲击倾向性、顶板存在厚层硬岩层等因素影响,鲍店煤矿采区采掘工作面冲击危险指数为0.52,冲击地压危险等级评定为C级中等冲击危险性;冲击地压危险区域主要集中在各工作面切眼、联巷交叉处、煤柱、停采线及超前支承压力等易形成应力集中的区域;大部分钻孔的钻屑量小于预紧值5L/m,冲击地压危险已基本解除,但仍有少数地带存在有冲击地压现象,应继续采用爆破卸压的方式,直至冲击地压危险完全解除为止。
In order to judge the danger of striking ground pressure,Baodian Mine was taken as example,the danger was evaluated by site observation,and the corresponding measures were given,influence by rock burst and thick and hard rock in roof,the mining face impact risk index is 0.52,impact pressure level is C,the impact risk distributes in the cut eye,connection of roadway,coal column and stopping line,the value of drilling cuttings weight less than 5L/m,basically without impact risk,with little rock burst,blast pressure-relief should be adopted until the risk removes.
作者
王飙
Wang Biao(Shanxi Jincheng Anthracite Coal Mining Group,Jincheng 048000,China)
出处
《煤炭与化工》
CAS
2017年第12期7-9,14,共4页
Coal and Chemical Industry
关键词
冲击地压
危险性评估
解危效果检验
应力集中
impact pressure
assessment of risk
test of the safety effect
the stress concentration
