1湖南省煤业集团辰溪矿业有限公司大坪煤矿浅部资源开采水害危险程度评估论证报告1、前言....................................................................................................................................11.1、任务来源.................................................................................................................11.2、评估依据.................................................................................................................21.3、工作目的和任务......................................................................................................31.4评估范围....................................................................................................................32、矿井概况............................................................................................................................32.1、地理位置与交通......................................................................................................32.2、自然地理.................................................................................................................62.3、矿山开采情况.........................................................................................................62.4矿井开拓系统.............................................................................................................82.5、矿井供电系统.........................................................................................................92.6、矿井排水系统.........................................................................................................93、矿井地质..........................................................................................................................123.1、区域地质概况........................................................................................................123.2、井田地层...............................................................................................................143.3、构造.......................................................................................................................153.4、含煤岩系及煤层顶、底板特征............................................................................184、矿井水文地质..................................................................................................................194.1、地表水...................................................................................................................194.2、岩层含水性...........................................................................................................204.4断层导水性...............................................................................................................224.5老窑水分布状况.......................................................................................................234.6矿井历年突水及涌水量情况...................................................................................244.6.1矿井突水........................................................................................................242湖南省煤业集团辰溪矿业有限公司大坪煤矿浅部资源开采水害危险程度评估论证报告4.6.2大坪煤矿历年涌水量统计............................................................................274.7井充水因素.........................................................
