特厚冲积层失水溃砂现场处置及地表沉降监测研究

Hand in scene of water and sands bursting of ultra-thick alluvium and study on the surface subsidence monitoring

为解决李粮店煤矿特厚冲积层突发涌水、溃砂造成的地面快速下沉问题,采取井筒紧急填沙、注水的处置措施,持续监测受影响区域的地表沉降,有效地减缓了地表下沉。研究结果表明:处于特厚冲积层层位的井筒内壁发生涌水、溃砂灾害时,对矿井井筒进行充填和水体回灌可以有效地遏制地表沉降;沉降范围以出水点为中心,向四周方向近似呈圆形沉降发展,最大下沉值为2.7 m,沉降面积约为121 853 m^2,周长约为1 455 m;失水地表沉降没有影响到煤矿附近高铁和高速的安全运行。

In orde r to solve the surface subs idenc e because of water and sands burs ting of ul tra- thick alluvium in Liliangdian coal-mine, sands and water are filled in the shaft peremptorily and the surface subsidence is mo-nitored continuously, which slow down the surface subsidence effectively. Results analysis show that when the gushing water and sand bursting happen to the auxiliary shaft in ultra-thick alluvium, the mine shaft filling and water injection can effectively curb the surface subsidence. The center of subsidence range due to water loss of ultra-thick alluvium is the water point, whose direction is the approximate circle and the maximum subsidence value is 2. 7 m. The subsidence area is about 121 853 m2 , and the circumference of about 1 455 m. The sur-face settlement of the water loss does not much effect on the high-speed rail and the high-speed^ safety traffic, which is all nearby the mine.