哈拉沟煤矿22402工作面初采期溃水溃沙机理及防治技术

结合哈拉沟煤矿22402工作面初采期煤层覆岩结构特征,对该工作面溃水溃沙事故的原因进行了分析,并提出了对应的防治措施。结果表明,22402工作面初采期煤层覆岩属单一关键层结构,关键层破断发生滑落失稳导致其上覆岩层整体断裂下沉,导水裂隙带导通了含水层与工作面,含水层水带动其上部沙粒溃入工作面而发生溃水溃沙事故。据此从开采前、开采期间和事故应急抢救3个方面,提出了工作面溃水溃沙事故的防治技术。

Water Inrush and Sand Inrush Mechanism and Prevention Technology During the Initial Mining Period in 22402 Working Face of Halagou Coal Mine

Combined with the structural features of overburden rock at initial mining period in 22402 working face of Halagou Coal Mine,water inrush and sand inrush reasons are analyzed and corresponding prevention and control measures are provided.The results show that it is single key stratum structure at initial mining period in 22402 working face,sliding instability of key stratum leads to the overall sinking of the overlying strata.The water flowing fractured zone connects the aquifer and the face,the aquifer water drives the upper sand and collapses into the face and water inrush and sand inrush accident occurs.From before mining,during mining and emergency rescue three aspects,water inrush and sand inrush accident prevention technologies are provided.