小屯煤矿开采7煤充水因素分析及涌水量预测
Coal Technology(2018)
Abstract
针对小屯煤矿开采7煤层受到矿井突水威胁的现状,在计算导水裂缝带高度及底板突水系数的基础上,确定小屯煤矿开采7煤直接充水因素为顶板龙潭组灰岩含水层和砂岩含水层,间接充水因素为底板茅口灰岩含水层.在考虑开采7煤上覆含水层静态储量释放的基础上,采用大井法对顶板动态水量进行了计算,并建立了以断层为通道的底板断层突水量计算模型,预测了小屯煤矿开采7煤矿井正常涌水量和最大涌水量.
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