膏体充填开采地表沉陷及覆岩移动破坏规律研究

Research on Surface Subsidence and Overburden Movement and Failure Law of Paste Filling Mining

为解决某煤矿条带煤柱膏体填充采掘过程中覆岩稳定性的问题,使用理论研究、数据模拟以及实地测量等方法,分析了膏体充填采掘过程中覆岩移动破坏规律。经实地测量表明:使用膏体充填采掘,巷帮移近量和顶底板移近量极值依次是42 mm、27 mm,距离开采面较远的巷道受采动影响比较弱,巷道矿压表现不明显,确保了回采巷道覆岩的可靠性及稳定性。

In order to solve the problem of overlying rock stability during the filling and excavation process of strip coal pillars in a certain coal mine,theoretical research,data simulation,and on-site measurement methods were used to analyze the movement and failure law of overlying rock during the filling and excavation process of the paste.Field measurements have shown that the extreme values of the displacement of the roadway side and the displacement of the roof and floor are respectively 42 mm and 27 mm when using paste filling for excavation.The roadway far from the mining face is relatively weak in the impact of mining,and the rock pressure performance of the roadway is not obvious,ensuring the reliability and stability of the overlying rock in the mining roadway.