深部矿井倾斜煤层采空区下回采巷道布置的数值模拟

为减少深部矿井倾斜煤层采空区下回采巷道的变形量和卧底量，降低回采巷道的返修率，以某矿为例，分析采空区下布置回采巷道的矿压显现规律及回采巷道位置参数，并采用FLAC^3D快速拉格朗日差分分析法进行数值模拟计算。结果表明：两层煤联合开采的下层位煤层回采巷道，应布置在上层位煤层已经稳定的采空区下；回采巷道与上层位煤体边缘之间的水平距离可通过取其在下层位煤层应力降低区域与下层位煤层小变形区域的取值范围的交集获得。该研究为采空区下回采巷道的位置选择提供了可靠的理论依据。

Numerical simulation of arranging mining roadway under inclined seam goaf in deep mine

This paper is devoted to studying the amount of undercover, and the roadway repair rate. reduction of the amount of roadway deformation, the This study, relying on the practical case of a mine, deals with an analysis of the behavior law governing the rock pressure of the mining roadway arranged un- der the goaf and positional parameters of mining roadway and development of numerical simulation using FLAC3D fast Lagrangian analysis method. The results show that, coal seam roadway with two layers of coal subjected to combined mining should be arranged under the goaf of the stabilized upper coal seam and the horizontal distance between the roadway and the upper coal seam is made possible by taking the intersec- tion between the stress-reducing area and small deformation area of the lower coal seam. The study may provide a reliable theoretical foundation for arranging mining roadway under goal.