不同断层倾角条件下防水煤柱合理宽度的研究  

Reasonable Width of Waterproof Coal Pillar Under the Condition of Different Fault Dip Angles

作　　者：彭文庆[1] 王卫军[1] 李青锋[1] 

机构地区：[1]湖南科技大学煤矿安全开采技术湖南省重点实验室能源与安全工程学院,湖南湘潭411201

出　　处：《采矿与安全工程学报》2009年第2期179-182,186,共5页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划项目(2007CB209400);国家自然科学基金项目(50674045)

摘　　要：为了研究不同断层倾角条件下的防水煤柱合理宽度,本文运用摩尔库伦准则求取了突水类型的断层倾角临界值.在综合考虑了煤柱本身受矿压及水压作用后的稳定程度;以及考虑煤柱一侧开采后形成的底板导水裂隙带位置与断层以及含水层的关系的情况下,运用弹塑性极限平衡理论、流体力学、土力学理论求得了断层倾角较大和较小时的防水煤柱宽度的计算公式.在推导出的理论公式基础上,利用MATLAB工具箱编程计算出托山煤矿防水煤柱宽度应为16 m.相对于以前设计的防水煤柱宽度来说,可减少4 m宽,既保证了煤矿的安全生产,又提高了采煤回收率,对节约能源起到了重要作用.Using the Mol-Coulomb rule, we calculated the critical angle of water-burst fault to determine the reasonable width of waterproof coal pillar under different fault dip angles. Based on the stability of coal pillar underground a certain pressure and on the relationship of water conducting fractures with fault and aquifer, we obtained the formula for calculating the width of waterproof coal pillar by applying the theory of elastic-plastic limited equilibrium, the theory of fluid mechanics and on the basis of this formula, the waterproof coal pillar＇s width of Tuo shan mine is calculated by MATLAB, with the width of coal pillar being shortened by 4 m, not only ensuring the safety production but also increasing the the recovery ratio of coal.

关 键 词：断层 防水煤柱 突水 弹塑性极限平衡理论 合理宽度 

分 类 号：TD313[矿业工程—矿井建设]