侏罗系煤田顶板砂岩水疏放后采空区涌水规律及预测方法  

Laws of Water Inrush and Prediction Method in Goaf After Water Drainage From Jurassic Coalfield Roof Sandstone Aquifers

作　　者：李德彬 LI Debin(China Coal Technology and Engineering Group Xi'an Research Institute, Xi' an 710054, China;Shaanxi Province Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology, Xi'an 710077, China)

机构地区：[1]中煤科工集团西安研究院有限公司,陕西西安710054 [2]陕西省煤矿水害防治技术重点实验室,陕西西安710077

出　　处：《煤矿安全》2019年第5期194-198,共5页Safety in Coal Mines

基　　金："十三五"国家重点研发计划资助项目(2017YFC0804106);国家自然科学基金青年科学基金资助项目(41602254)

摘　　要：为了提高侏罗系煤田顶板孔隙裂隙砂岩含水层涌水量预测精度,以宁东马家滩矿区某矿4-1煤首采工作面为例,分析了回采阶段采空区涌水变化规律,从理论上结合"大井"法、"镜像法原理"为代表的解析法,提出了侏罗系煤田煤层回采过程中顶板含水层静储水量释放与动态补给水量时空动态预测方法。研究推算的工作面回采过程涌水量预测公式更能精确地预测涌水量,为工作面回采前顶板水预疏放程度提供依据,保障工作面安全回采不受顶板水害威胁。此外,运用提出的预测方法对宁东马家滩矿区某矿首采工作面涌水量进行了预测,并与实际观测水量对比分析,结果表明:涌水量预测值与实际观测值吻合较好,平均误差约10%。To improve the prediction accuracy of the water inflow in the pore fractured sandstone aquifers of the Jurassic Coalfield, the change laws of water bursting in goaf at the stage of recovery are analyzed. Taking the first mining face of 4-1 of a coal mine in Ningdong Majiatan as an example, and the time and space dynamic prediction method of static water storage and dynamic replenishment of roof aquifer in Jurassic coal seam mining process based on the theory of “large well” and“principle of mirror method” is proposed. The prediction formula of water inflow in the working face during recovery process can be used to predict the water inflow more accurately, and provide the basis for the pre -dredging degree of the roof water before the mining, and ensure the safety of mining at the working face threatened by roof water hazards. The water inflow of the first mining face of a mine in the Ningdong Majiagan Mining Area is predicted by the newly proposed prediction method and compared with the observed values. The result shows that the predicted values of the water inrush are in good agreement with the observed values, and the average error is about 10%.

关 键 词：侏罗系煤田 顶板砂岩含水层 时空动态预测 衰减率 工作面涌水量 

分 类 号：TD742.1[矿业工程—矿井通风与安全]