铁路下煤矿超高水充填开采地表沉陷研究

Surface Subsidence of High Water Filling Mining in Coal Mine Under Railway

随着国家铁路网的不断延伸,铁路线下压煤量日益增多,为在保障铁路运营安全的前提下更好的回收煤炭资源,应用FLAC3D数值模拟、概率积分法预测及现场实测相结合,研究铁路下超高水充填开采技术对地表铁路运营的影响,通过设置不同的回采方案,应用FLAC3D数值模拟对比不同充填率、不同工作面布置情况下,开采活动对地表沉降量的影响程度。煤矿现场工作面实际宽度为100 m,超高水充填率为94%,通过概率积分法预测地表的最大下沉量为73 mm;地面观测站观测结果 65 mm,均与FLAC3D数值模拟充填率95%结果极为接近,且根据铁路建设的相关规定,地表下沉量符合铁路安全通行的要求,超高水充填环保、经济、有效。

With the continuous extension of the national railway network,the amount of coal under railway line is increasing.To recover coal resources better on the premise of ensuring the safety of railway operation,FLAC3D numerical simulation,probability integral method prediction and field measurement are combined to study the impact of filling mining technology under railway super-high water on surface railway operation.By setting different mining schemes,FLAC3D numerical value is applied.The influence of mining activities on surface subsidence is simulated and compared under different filling rates and different working face layouts.The actual width of coal mine working face is 100 m,the filling rate of super-high water is 94%,and the maximum surface subsidence is predicted by probability integral method to be 73 mm;the observation result of ground observation station is65 mm,which is very close to the filling rate of FLAC3D numerical simulation of 95%.According to the relevant regulations of railway construction,the surface subsidence meets the requirements of safe passage of railway,and the filling of super high water meets the requirements of environmental protection,economy and effectiveness.