三台子水库下压煤综放开采覆岩破坏充水特征  

Features of overburden failure and water filling in coal mining with sub-level caving under Santaizi reservoir

作　　者：冯国财[1] 徐白山[2] 王东[3] 

机构地区：[1]辽宁经济职业技术学院科研处,辽宁沈阳110122 [2]东北大学资源与土木工程学院,辽宁沈阳110004 [3]辽宁工程技术大学矿业学院,辽宁阜新123000

出　　处：《采矿与安全工程学报》2014年第1期108-114,共7页Journal of Mining & Safety Engineering

基　　金：国家科技部社会公益专项基金项目(2005DIB3J178)

摘　　要：针对水库下特厚煤层综放开采安全问题，采用地面钻孔冲洗液漏失量法、EH-4连续电导率剖面仪法，对大平煤矿 N1S1工作面采动前后覆岩破坏及充水状况进行了探测，利用 RFPA2D系统对覆岩变形破坏进行了反演和模拟。结果表明：覆岩破坏导水裂缝带发育在工作面采空区上方垂直方向卸压、水平方向拉伸区覆岩内，顶界面深度220.92 m，钻孔冲洗液漏失量平均0.50-0.71 L/；白垩系砂及砂砾岩承压含水层下部微弱含水段处于导水裂缝带内，深度约200 m水平之下岩层呈充水状态，视电阻率20-40Ωm；导水裂缝带上方，深度约120 m水平以下，岩层呈垂直方向卸压、水平方向压缩状态，离层破坏发育，不导水。水库下采煤是安全的。To solve the security problem of fully mechanized mining with sub-level caving in the su-per-thick coal seam under the reservoir, by the flushing fluid leakage measurement in surface borehole and detection of EH-4 continuous conductivity profile instrument, the overburden failure features and water filling states before and after N1S1 Coal Face mining in Daping Coal Mine were detected, and the deformation and failure features of overburden were retrieved and simulated by using RFPA2D Software. The results show that the permeable fractured zone is developed in the vertical pressure-relief and hori-zontal tensile zone of rock stratum above goaf, while the top interface depth is 220.92 m, and the aver-age flushing water leakage in borehole is 0.50-0.71 L/（s＆#183;m）.Meanwhile, the weak water-bearing section in the lower part of Cretaceous sandstone and sandy conglomerate confined aquifer is located in the fracture zone, while the rock strata below the depth of 200 m are in the state of water filling, and the apparent resistivity is 20-40Ωm. In addition, the rock strata which are above the permeable fractured zone, and below the depth of about 120 m, are in the states of vertical pressure-relief and horizontal compression, as well as bed separation development, and no water filling. Thus, the coal mining under the reservoir is safety and reliable.

关 键 词：综放开采 覆岩破坏 导水裂缝带 冲洗液漏失量 视电阻率 

分 类 号：TD327[矿业工程—矿井建设]