多煤层开采时条带空间位置对岩层移动的影响

The Effect of Pillar Locations on Strata Movement in Multi-seam Mining

本文在采用弹塑性有限单元法模拟的基础上,得到了多煤层条带空间位置与岩层及地表移动间的关系。给出了下沉系数q、水平移动系数b,主要影响范围角正切tgβ与上、下煤层条带间水平错距l、层间距h、累计采厚m的计算公式。根据这些计算公式计算的结果与实测相比符合较好。

Based on the elastic plastic finite element method(FEM), the paper gives the relation between the locations of pillar in several seams and the movements of ground and strata. The formulas for calculating the factors such as subsidence factor q, horizontal movement factor b, tangent of main effect angle tgβ, horizontal distance between pillars of contiguous seams l, distance between seams h, and accumulative thickness of mined seams m have been obtained. The results calculated with these formulas are satisfactorily coincident with the field data obtained in some collieries.