万利一矿煤层群开采覆岩导水裂隙带高度研究  

Study on height of water conducting fracture zone in overburden induced by coal seam group mining in Wanli No.1 Coal Mine

作　　者：智国军 刘润 杨瑞刚 曹志国 鞠金峰[3] 赵富强 ZHI Guo-jun;LIU Run;YANG Rui-gang;CAO Zhi-guo;JU Jin-feng;ZHAO Fu-qiang(Wanli No.1 Coal Mine Baotou Energy Co.,Ltd.,Ordos 017000,China;State Key Laboratory of Water Resources Protection and Utilization in Coal Mining,Beijing 100011,China;IoT/Perception Mine Research Center,China University of Mining and Technology,Xuzhou 221008,China;School of Mines,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]国能包头能源有限责任公司万利一矿,内蒙古鄂尔多斯017000 [2]煤炭开采水资源保护与利用国家重点实验室,北京100011 [3]中国矿业大学物联网(感知矿山)研究中心,江苏徐州221008 [4]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤炭工程》2021年第10期106-110,共5页Coal Engineering

基　　金：煤炭开采水资源保护与利用国家重点实验室开放基金资助项目(SHJT-16-30.2)。

摘　　要：为了获得万利一矿浅埋煤层群大采高开采条件下的覆岩导水裂隙发育高度,采用理论预计与工程探测相结合的方法开展研究。基于关键层理论研究形成了适用于煤层群开采条件的导水裂隙带高度预计方法,并判断得出,上部3-1煤开采后覆岩导水裂隙将发育至基岩顶界面,后续再次开采下部4-2煤,导水裂隙带顶界高度不再增加;理论预计结果得到了现场钻孔工程探测的验证。钻孔冲洗液漏失、孔内水位变化以及钻孔电视观测结果表明,两煤层重复开采引起的导水裂隙已发育至地表,对应导水裂隙带高度为170m;上下煤层开采的垮落带高度分别为21m和18m,对应垮采比分别为4.2和3.8。研究结果可为类似开采条件下的保水采煤实践提供依据。In order to obtain the overburden water conducting fracture height under the large mining height of shallow coal seam mining in Wanli No.1 Coal Mine, theoretical prediction and field drilling detection are carried out. Based on the key strata theory, the prediction method for the height of water conducting fracture zone is researched for coal seam group mining. With the method, it is discovered that, whether mining 3-1 coal seam alone or 3-1 coal seam and 4-2 coal seam repeatedly, the height of water flowing fracture zone in overburden rock is basically the same, and the water conducting cracks are developed into the surface sand outside the top interface of bedrock;and the prediction result is verified in the field drilling engineering detection. Combining with the leakage of flushing fluid and the change of water level in the borehole and the borehole TV observation, it is found that the water flowing fissures caused by repeated mining have developed to the surface, the corresponding height of water fracture zone is 170 m;the height of overburden caving zone caused by 3-1 coal mining and 4-2 coal mining is 21 m and 18 m respectively, and the corresponding overburden caving ratio is 4.2 and 3.8.

关 键 词：浅埋煤层 煤层群开采 导水裂隙 垮落带 关键层 

分 类 号：TD325[矿业工程—矿井建设]