1.School of Resource & Safety Engineering, China University of Mining & Technology (Beijing), Beijing , China; 2.Engineering Technology Research Center of National Mine Water Disaster Prevention & Controlling (Beijing), Beijing , China; 3.Hebei State Key Laboratory of Mine Disaster Prevention, North China Institute of Science and Technology, Beijing, China

针对松散冲积层大规模水体疏放易引起地表沉降变形与建筑物破坏的问题,根据朱仙庄矿邻近矿区兴隆庄矿的长期实测资料,建立了分土层的地层压缩量及地面倾斜值计算模型,并对朱仙庄矿疏水影响区域的井筒及典型建筑物的沉降量及倾斜值进行了预计和损害评价。结果表明:朱仙庄矿松散土层砂砾、粗砂的压缩率最大,为0.174 8 mm/m~2,黏土的压缩率最小,为0.051 7 mm/m~2;该区域典型建(构)筑物地表下沉量最大为532.75 mm,最小为237.04 mm;地面倾斜值最大为0.120 mm/m,未达到建(构)筑物Ⅰ级损坏等级;考虑地表建(构)筑物的稳定性和地表积水问题,提出了控制疏水降深和速度、建(构)筑物搬迁或排水、公路增高回填、调查井壁与井塔与其装备的相互位置关系等预防建(构)筑物破坏的技术防治措施。

To solve the problem of ground subsidence and building failure induced by large-scale water drainage in a loose alluvium in the Zhuxianzhuang Mine, a calculation model was built to obtain the strata compression and ground inclination caused by each layer based on long-term measurement data in the neighboring Xinglongzhuang Mine, and the subsidence and inclination of the shafts and typical buildings in the drainage-influenced area were predicted and evaluated. Results showed that the compression rate of the gravel and coarse sand was the highest in the loose alluvium in the Zhuxianzhuang Mine, which was 0.174 8 mm/m2, while the compression rate of the clay was the lowest, which was 0.051 7 mm/m2. The maximum and minimum subsidence of the typical buildings and structures in the studied area was 532.75 and 237.04 mm, respectively. The maximum ground inclination was 0.120 mm/m, which was lower than the value required in the Grade Ⅰ damage of buildings and structures. Considering the stability of the buildings and structures and the stagnant surface water, technical measures for failure prevention of the buildings and structures were proposed, which included controlling drainage drawdown and drainage rate, relocating or draining buildings and structures, backfilling highways, and investigating the positional relationship of the shaft wall and the equipment.

河北省矿井灾害防治重点实验室开放基金资助项目(KJZH2017K04)；