条带开采煤柱破坏宽度计算分析  

Analysis on damaged width of coal pillar in strip extraction

作　　者：王连国[1] 缪协兴[1] 王学知[2] 李青峰[1] 

机构地区：[1]中国矿业大学理学院,江苏徐州221008 [2]山东科技大学,山东青岛266510

出　　处：《岩土工程学报》2006年第6期767-769,共3页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金重大项目(50490270);国家杰出青年科学基金项目(50225414);973计划项目(2005CB221502);教育部科学技术研究重点项目(106084)

摘　　要：将条带开采工作面假定为无限大板上相隔一定间距的倾斜共线裂纹,采用断裂力学Ⅰ-Ⅱ复合型裂纹模型,得到了条带煤柱边缘的应力分布,建立了条带煤柱边缘破坏区的边界方程,并据此得出了条带煤柱破坏宽度的计算公式。实例分析表明用该公式计算条带煤柱破坏宽度是符合实际的。Assuming the working face in the strip extraction as a series of co-linear cracks with certain spacing interval, the Ⅰ - Ⅱ composite crack model in fracture mechanics was adopted to get the stress distribution at the edge of coal pillar, so the border equation of the edge of coal pillar was created. Accordingly the formula for calculating damaged width of the strip coal pillar was obtained. It was shown that the damaged width calculated by the formula was in accordance with the observed data.

关 键 词：条带开采 煤柱 破坏宽度 断裂力学 

分 类 号：TD823.6[矿业工程—煤矿开采]