条带煤柱设计中极限平衡理论的修正应用

Amended limit equilibrium theory in strip coal pillar design

随着采矿工业的发展,我们必须面对如何在人口密集地区进行煤矿地下开采的问题,采用条带开采无异是目前较好的解决方案。进行条带开采首要解决的问题是如何确定条带设计的理论公式。本文采用连续介质力学理论,探讨了条带开采时所需留设的合理条带尺寸。以弹塑性力学为基础,结合应力平衡微分方程和库仑准则求出了保留条带煤柱的应力极限平衡区宽度及其理论公式,理论公式经实践验证能满足现场要求。

With the development of mining industry, we now face how to mine under residential areas, strip mining method is a better saturation . But firstly we should know use what theory to decide the size of pillar. The proper size of coal pillars and mining width for partial mining are studied with theory of continuum mechanics. Based on elastoplastic theory, using stress differential equilibrium and Coulomb Criterion, the authors obtained width of pillar limit equilibrium zone. Validated by practice the formulation can meet requirements on the spot.