摘要
巷道切顶卸压后,顶板岩石垮落会在采空区侧堆积成帮,采空区侧岩石的碎胀特性直接影响巷道的稳定性.为研究碎胀系数对巷道稳定性的影响,以5-200回采工作面为工程背景,采用了理论分析与现场实测相结合的方法,对顶板岩石碎胀系数随时间变化的规律进行研究.研究表明顶板岩石碎胀系数随垮落时间增长而变小,在35d之后趋于稳定,均值为1.36.
After the roadway is topped and depressurized, the roof rock collapse will accumulate on the side of the goaf, and the crushing characteristics of the rock on the side of the goaf directly affect the stability of the roadway. In order to study the influence of the coefficient of expansion on the stability of the roadway, this paper takes the 5-200 mining face as the engineering background, and combines the theoretical analysis with the field measurement to study the law of the coefficient of collapse of the roof rock with time. Studies have shown that the coefficient of collapse of the roof rock becomes smaller as the fall time increases, and tends to be stable after 35 days, with a mean value of 1.36.
作者
祁振华
Qi Zhenhua(Huozhou Coal Electricity Group Co.,Ltd., Huozhou 031400, China)
出处
《矿业工程研究》
2019年第2期8-11,共4页
Mineral Engineering Research
关键词
复杂顶板
切顶卸压
碎胀系数
complex roof
top crushing
crushing coefficient
