矿区铁路专用线开采沉陷规律研究

Study on mining subsidence law of railway special line in mining area

为研究开滦钱家营矿区铁路专用线开采沉陷规律,本文通过建立十采区2097W倾向地表移动观测站,绘制铁路专用线下沉曲线,综合分析铁路移动变形规律。研究结果表明,2097W工作面倾向为非充分采动,属于深部多煤层重复开采,铁路下沉活跃阶段持续163 d,占总下沉量的80.3%,最大下沉系数0.56,最大下沉速度12.12 mm/d,铁路最大下沉速度滞后角73°32′40″,下沉超前影响角71°54′3″,铁路最大下沉值1285 mm,最后利用matlab的Curve Fitting Tool工具拟合出下沉曲线方程,为矿区铁路专用线沉陷治理提供参考,保证了矿区的安全和生产,并对今后“三下”开采提供了科学依据。

In order to study the law of mining subsidence of railway special line in Qianjiaying mining area of Kailuan,this paper drew the subsidence curve of railway special line by establishing No.2097W inclined surface movement observation station in the tenth mining area,and comprehensively analyzed the law of railway movement and deformation.The results showed that the tendency of No.2097W Face was not fully mined,which belonged to the repeated mining of deep multi-coal seams.The active stage of railway subsidence lasted for 163 days,accounting for 80.3%of the total subsidence.The maximum subsidence coefficient was 0.56,the maximum subsidence speed was 12.12 mm/d,the lag angle of the maximum subsidence speed of the railway was 73°32′40″,the influence angle of subsidence advance was 71°54′3″,and the maximum subsidence value of the railway was 1285 mm.Finally,the subsidence curve equation was fitted by using the Curve Fitting Tool of matlab.It provided a reference for the subsidence control of the railway special line in the mining area,ensured the safety and production of the mining area,and provided a scientific basis for the future'three under'mining.