摘要
晋能控股煤业集团有限公司晋华宫煤矿11^(#)煤层开采后存在遗留煤柱,对下层12~#层的应力环境将会产生影响,其中河北12^(#)煤层307盘区煤层倾角从5°至15°变化不等。基于巷道蝶形破坏原理,采用数值模拟的方法对晋华宫矿不同煤层倾角条件下巷道的合理布置位置展开研究,结果表明:当煤层倾角为0°时,巷道内错20 m以上布置时较为合理;当煤层倾角为5°时,巷道内错27.5 m以上布置时较为合理;当煤层倾角为15°时,巷道内错35 m以上布置时较为合理。显然,当煤层存在倾角时,在巷道合理布置位置的基础上将内错距增加0.5~1.0 m/°可以使巷道处于良好的应力环境内。为晋华宫矿煤柱下巷道布置提供参考依据。
After the mining of the 11th coal seam in Jinhuagong Coal Mine,there are residual coal pillars that will have an impact on the stress environment of the lower 12th coal seam.Among them,the dip angle of the 12th coal seam located in the north of the river in the 307 panel area varies from 5 degrees to 15 degrees.Based on the principle of butterfly failure in tunnels,a numerical simulation method was used to study the reasonable layout of tunnels under different coal seam dip angles in Jinhuagong Mine.The results showed that when the coal seam dip angle was 0 degrees,it is more reasonable to arrange the internal displacement of the roadway more than 20 m;When the dip angle of the coal seam is 5 degrees,it is more reasonable to arrange the internal displacement of the roadway more than 27.5 m;When the dip angle of the coal seam is 15 degrees,it is more reasonable to arrange the internal displacement of the roadway more than 35 m.Obviously,when there is a dip angle in the coal seam,increasing the internal displacement by 0.5~1.0 meters per degree on the basis of the reasonable layout of the roadway can keep the roadway in a good stress environment.The research results provide a reference basis for the layout of coal pillar tunnels in Jinhuagong Mine.
作者
宋哲强
Song Zheqiang(Jinhuagong Mine.,Jinneng Holding Coal Group Co.,Ltd.,Datong Shanxi 037000)
出处
《晋控科学技术》
2024年第2期27-32,共6页
Jinneng Holding Science and Technology
关键词
遗留煤柱
煤层倾角
巷道变形
合理错距
Remaining coal pillar
Dip angle of coal seam
Roadway deformation
Reasonable malposition.
