摘要
采用数值模拟的手段揭示了沿空留巷应力分布规律,模拟结果显示承载力随着煤层厚度变薄而不断增强,且越不容易形成应力转移,其峰值应力距离煤壁的宽度约为2 m,选定不同充填体宽度进行模拟,选定了1.2 m充填体为最佳宽度。设计五种不同距离卸压钻孔设计方案,并进行了现场试验,综合考虑各类因素,最终选择200 mm的卸压钻孔间距为最佳间距。
The numerical simulation method was used to reveal the stress distribution law of the roadway along the roadway.The simulation results show that the bearing capacity increases with the thickness of the coal seam,and the stress transfer is less likely to be formed.The peak stress distance is about 2 m,the different widths of the filling body were used to make simulation.1.2 m was chosen as the best width.The design of five different distance pressure relief holes was designed and the field test was carried out.Considering all kinds of factors,finally,the 200 mm was selected as for the best spacing of pressure relief holes.
作者
周世勇
ZHOU Shi-yong(Zuoquan Hongyuan Coal Industry Co.,Ltd.,Shanxi Coal Import and Export Group,Zuoquan,Shanxi,032600)
出处
《煤炭科技》
2018年第1期59-61,共3页
Coal Science & Technology Magazine
关键词
巷道开拓
围岩控制
钻孔间距
roadway development
surrounding rock control
drilling spacing
