铁路桥下采煤地表变形预计及治理研究

Study on Prediction and Treatment of Surface Deformation in Coal Mining under Railway Bridge

小康煤矿S2N7综采放顶煤工作面上部有铁路桥穿过,为最大限度回收煤炭资源和保证上部铁路桥的安全、稳定运行,结合小康煤矿的实际生产情况,通过现场踏勘、计算机模拟和三维数字建模的方式对S2N7综采放顶煤工作面采后的地表变形进行了预计,提出了铁路桥维修加固技术措施。预计结果表明工作面开采结束后铁路桥的最大下沉值为3.3 m,铁路桥通过采取“桥改涵”改造加固和安全管理措施后,保证了桥面上方车辆的正常通行和桥下过水。

There is a railway bridge passing through the upper part of S2N7 fully mechanized top-coal caving face in Xiaokang coal mine, in order to maximize the recovery of coal resources and ensure the safe and stable operation of the upper railway bridge, combined with the actual production situation of Xiaokang coal mine, through field survey, computer simulation and three-dimensional digital modeling,the surface deformation of S2N7 fully mechanized top-coal caving face in Xiaokang coal mine is predicted, the technical measures of railway bridge maintenance and reinforcement are put forward. The predicted result shows that the maximum subsidence of the railway bridge after the mining of the working face is 3.3 m, after the railway bridge adopts "bridge to culvert" reconstruction and reinforcement and safety management measures, the normal passage of vehicles above the bridge deck and the passage of water under the bridge are guaranteed.