浅埋煤层采动覆岩导水通道分布特征试验研究  

Physical simulation of water crack distribution characteristics in overlying strata under coal mining conditions

作　　者：马立强[1] 张东升[1] 乔京利[2] 王少义 王晔 

机构地区：[1]中国矿业大学矿业工程学院,煤炭资源与安全开采同家重点实验室,江苏徐州221008 [2]山东岱庄生建煤矿微湖监狱,山东微山277606 [3]山东微山七五生建煤矿,山东微山277606 [4]神华新疆能源苇湖梁煤矿,新疆乌鲁木齐830017

出　　处：《辽宁工程技术大学学报（自然科学版）》2008年第5期649-652,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：教育部新世纪优秀人才支持计划基金资助项目(NCET-05-0480);中国矿业大学煤炭资源与安全开采国家重点实验室2007年开放基金资助项目(07KF09);中国矿业大学科学研究基金资助项目(2005B002)

摘　　要：为解决浅埋煤层的保水开采难题,采用物理模拟方法,研究了浅埋煤层大采高长壁工作面的采动覆岩导水通道的分布特征。结果表明:对于典型浅埋煤层,大采高工作面在初次来压至第一次周期来压期间,覆岩导水通道迅速发育至松散含水层底部,工作面后方约2个周期来压距离后,采空区覆岩垮落带以上的覆岩导水通道被逐渐压实闭合,但开切眼处的导水通道不易闭合;对于次浅埋煤层,主关键层初次来压后,导水通道迅速发育至最大高度,但伴随着主关键层约1～2个周期来压后,基本顶至主关键层之间断裂带内的覆岩导水通道可很快被压实闭合。该成果可对浅埋煤层保水防溃采煤研究和应用提供基础理论指导。To solve the difiiculities of aquifer-protective mining, the water cracks distribution characteristics in the overlying strata are studied by physical simulation. For the typical shallow coal seam, water cracks rapidly arise to the bottom of loosed water-bearing layer during the first caving and the first period caving. About 2 period caving distances behind the coalface in the gob area, the water cracks in the overlying strata above the caving zone close gradually, but the cracks near the cut hole region do not close easily. For the sub-shallow coal seam, water cracks arise to the highest quickly when the main key strata break. About 1~2 period caving distances behind the coalface in the gob area, the water cracks in the caving zone between the main roof and the main key strata close gradually. Above achievements can be rationally used to prevent and control roof water inrush and protect water body in shallow coal seam mining.

关 键 词：浅埋煤层 采动覆岩 导水通道 分布特征 关键层 保水开采 

分 类 号：TD325[矿业工程—矿井建设]