基于离散元的断层防水煤柱留设规律研究  

Study on Remaining Rule of Fault Waterproof Coal Pillar Based on Discrete Element Method

作　　者：刘发义[1,2] 张玉东 

机构地区：[1]河南理工大学资源环境学院,河南焦作454000 [2]山西晋城煤业集团赵庄煤矿,山西长子046605 [3]中煤科工集团重庆研究院有限公司水文物探研究分院,重庆400039

出　　处：《矿业安全与环保》2016年第3期71-73,76,共4页Mining Safety & Environmental Protection

基　　金：国家"十二五"科技支撑计划项目(2012BAK04B00)

摘　　要：通过对某煤矿2321工作面突水模型、2313工作面开采模型进行基于离散元的数值模拟分析,总结出采动条件下留设不同宽度的防水煤柱时采空区围岩应力场的变化规律,以及该矿断层防水煤柱宽度的计算公式。研究结果表明,奥灰顶界断层破碎带附近最小主应力大于该区域奥灰水压是断层突水的必要非充分条件,同时2313工作面开采时F6断层不需留设防水煤柱。In this paper,numerical simulation and analysis based on the discrete element were made on the water inrush model of 2321 working face and the mining model of 2313 working face,the changing regularity of the surrounding rock stress field in the gob when the waterproof coal pillars in different width were remained under the mining condition was summarized,and calculation formula of the the fault waterproof pillar width of this mine was obtained. The research results showed that the minimum principal stress near the fault fractured zone on the top boundary of Ordovician limestone higher than the Ordovician limestone water pressure was the necessary but not sufficient condition of water inrush from fault,and it was not necessary to remain the waterproof coal pillar for F6 fault in the mining of 2313 working face.

关 键 词：断层突水 离散元 防水煤柱 煤柱宽度 

分 类 号：TD745[矿业工程—矿井通风与安全]