摘要
为了研究沿空掘巷窄煤柱合理宽度留设问题,采用理论分析和数值模拟相结合的方法,理论计算了窄煤柱的宽度,推导出了窄煤柱留设的合理宽度的计算公式;然后数值模拟了不同宽度的窄煤柱下围岩应力分布规律、窄煤柱水平位移场以及巷道围岩变形量规律,最终确定某煤矿的沿空留巷的窄煤柱留设宽度为5 m。研究为综放开采区段煤柱宽度的确定提供了指导。
In order to study the reasonable width of narrow coal pillar in gob side driving roadway,the width of narrow coal pillar is calculated theoretically and the calculation formula of the reasonable width of narrow coal pillar is deduced by using the method of theoretical analysis and numerical simulation,then the stress distribution law,horizontal displacement field of narrow coal pillar and deformation law of surrounding rock under different width of narrow coal pillar are simulated,finally,it is determined that the width of narrow coal pillar of gob side entry in a coal mine is 5 m.The study provides guidance for the determination of the pillar width in the fully mechanized caving mining section.
作者
张凯
Zhang Kai(Sihe Coal Mine,Shanxi Jincheng Anthracite Coal Mining Group Co.,Ltd.,Jincheng 048205,China)
出处
《能源与环保》
2019年第11期159-162,166,共5页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
关键词
沿空掘巷
窄煤柱
合理宽度
应力分布
水平位移场
围岩变形量
roadway along the goaf
narrow coal pillar
reasonable width
stress distribution
horizontal displacement field
deformation of surrounding rock
