榆神府矿区煤层开采沟壑区地表下沉系数研究

Study on Surface Subsidence Coefficient of Coal Seam Mining Gully Area in Yushenfu Mining Area

黄土沟壑区地表下沉系数是榆神府矿区开采损害评估的关键。以柠条塔N1114工作面为工程实例,采用数据归纳、拟合分析和理论分析计算,对榆神府矿区沟壑区下煤层开采地表下沉系数展开研究。研究结果表明:沟坡滑移量、基岩厚度、土层厚度和采高是沟壑区地表下沉系数的4个主要影响因素;通过函数拟合了煤层开采沟壑区地表下沉系数计算式,计算时考虑沟坡滑移量能增加沟壑区地表下沉系数的预计精度。

The surface subsidence coefficient in the loess gully area is the key to the mining damage assessment in Yushenfu mining area.Taking the N1114 working face of Ningtiao tower as an example,the surface subsidence coefficient of the coal seam mining under the gully area in Yushenfu mining area is studied by data induction,fitting analysis and theoretical analysis and calculation.The results show that the slip amount of gully slope,the thickness of bedrock,the thickness of soil layer and the mining height are the four main factors affecting the surface subsidence coefficient in the gully area.The calculation formula of the surface subsidence coefficient in the gully area of coal seam mining is fitted by the function.Considering the amount of slope slip in the calculation can increase the prediction accuracy of the surface subsidence coefficient in the gully area.