多煤层条带开采的数值模拟研究

Numerical Simulation on the Strip Mining of Multiple Seams

应用非线性有限元法，对条带开采不同层间距的３ 层煤进行了数值模拟研究，揭示了多煤层条带开采的岩层移动变形规律和岩层内波浪沉降发育规律，及其与层间距、条采尺寸、采出率的相互关系，提出了多煤层条带开采的煤柱留设方法及有限元法煤柱稳定性的评定标准。

Nonlinear finite element method was used for the numerical simulation of the strip mining of three seams with different seam distances.The study results revealed the strata displacement or deformation rules and the development rule of wave subsidence in strata during strip mining multi-seams,and their interrelationship with seam distance,strip mining size and extraction rate.The author puts forward a method of remaining coal pillar for strip mining multi-seams and the evaluation standard of coal pillar stability by finite element method, so as to provide a theoretical basis for engineering practice.