摘要
为了得到新维矿区顶底板围岩瓦斯渗透率受巷道掘进影响的演化规律,从力学角度分析了煤岩体的变形与应力变化同渗透率的关系式;给出了不用状态下的应力-渗透率关系式及特征演化曲线;利用FLAC3D软件模拟新维煤矿8104工作面风巷的渗透率演化规律;研究了煤岩体在不同推进距离下围岩渗透率最大位置及最大值的变化。结果表明:对于新维煤矿来说,煤岩体的瓦斯渗透率不会随着巷道的掘进而变化,并且渗透率最大值点始终固定在顶底板内1.6 m左右,最大值约为3.51 mD,满足瓦斯自主解析能力。
In order to get the gas permeability evolution law of surrounding rocks that affected by roadway excavation in Xinwei mining area, the mechanical relationship between deformation and stress change of coal and rock was analyzed;stress-premeability relation and characteristics evolution curve in different conditions were achieved;the evolution law of 8104 ventilation roadway in Xinwei Coal Mine was simulated by FLAC3D software;the changing rules of maximum value and location of gas permeability at different advancing distance were studied. The results showed that the gas permeability of coal and rocks would not change with roadway excavation in Xinwei Coal Mine, and the maximum gas permeability fixed on the location 1.6 m upon the roof and 1.6 m below the floor, and the maximum permeability value was about 3.51 mD, and the gas could be permeated independently.
作者
彭博
李雄
饶孜
胡勇
Peng Bo;Li Xiong;Rao Zi;Hu Yong(Technology Center of Sichuan Coal Industry Group Limited Liability Company, Chengdu, Sichuan 610091, China;College of Resources and Environmental Science, Chongqing University, Shapingba, Chongqing 400044, China;Sichuan Furong Group Industry Limited Liability Company, Yibin, Sichuan 644002, China)
出处
《中国煤炭》
2019年第5期59-63,72,共6页
China Coal
关键词
掘进巷道
围岩
渗透率
瓦斯
煤岩体
应力应变
excavation roadway
surrounding rock
permeability
gas
coal and rocks
stress-strain
