断层保护煤柱合理宽度及工作面合理宽度数值模拟研究  

Numerical Simulation Study on Rational Width of Fault Protection Coal Pillar and Rational Width of Working Face

作　　者：李伟[1] 张广鹏 刘志达[3] 孙培聪[3] 

机构地区：[1]煤炭工业济南设计研究院有限公司,山东济南250031 [2]中煤科工集团重庆研究院有限公司,重庆400039 [3]山东科技大学资源与环境工程学院,山东青岛266590

出　　处：《矿业安全与环保》2014年第1期16-19,共4页Mining Safety & Environmental Protection

摘　　要：结合某矿井实际地质条件,运用数值模拟软件FLAC3D建立含断层的数值计算模型,分析研究了在不同宽度的断层保护煤柱和不同宽度的工作面相互组合条件下的围岩的塑性破坏情况。当煤柱宽度为60 m时,随着工作面宽度的增加,围岩塑性破坏区一直增大,在靠近断层一侧的顶板岩层塑性破坏较明显,这主要是由于断层周围的岩石比较破碎,围岩强度较低造成的。根据研究结果,确定断层保护煤柱的合理宽度为60 m,工作面的合理宽度为75 m,为断层周围煤层的安全回采提供了一定的科学依据。In this paper, a mathematical model containing faults was built according to the actual geologic condition of a mine and by using the numerical simulation software FLAC3D , and analysis was carried out on the plastic deformation failure of surrounding rocks under the combination conditions of both the fault protection coal pillars and working faces with different width. When the width of the coal pillar was 60 m, the plastic failure zone of the surrounding rock was increased with the increase of the width of the working face, the plastic failure of the roof rock strata near the fault became obvious, this was mainly caused by the broken surrounding rock and its low strength. On the basis of the research results, the rational width of the fault protection coal pillar was fixed as 60 m and that of the working face was fixed as 75 m, which thus provided a certain scientific basis for the safe mining of the coal seams around the faults.

关 键 词：断层 保护煤柱 工作面 合理宽度 数值模拟 

分 类 号：TD322[矿业工程—矿井建设]