摘要
厚煤层工作面开采与一般厚度煤层开采不同,其一次采出厚度增高,使得上覆岩层回转运动空间加大,容易诱发较为剧烈的矿山压力显现。基于此,对下沟煤矿201厚煤层工作面煤体应力监测,监测结果表明:工作面支承压力影响范围约在工作面前方101 m,明显影响范围为52.9 m,剧烈影响范围为32.4 m;工作面留设20 m区段煤柱处于应力峰值以内,但从回收资源角度来看,可以进一步缩小煤柱尺寸。根据数值模拟计算结果,结合工作面支承压力分布规律,工作面区段煤柱的合理尺寸为7 m。
The mining of thick coal seam is different from the mining of general thick coal seam.The thickness of the first mining is increased,which makes the space of overlying strata rotary movement increase,and it is easy to induce more intense mine pressure.Based on this,the monitoring results of the stress of the 201 thick coal seam face in Xiagou Coal Mine show that the influence range of the bearing pressure of the working face is about 101 m in front of the working face,the obvious influence range is 52.9 m,and the violent influence range is 32.4 m;at present,the coal pillar in the 20 m section of the working face is within the peak stress,but from the perspective of the recovery of resources,the size of the coal pillar can be further reduced.According to the results of numerical simulation,combined with the distribution law of supporting pressure in the working face,the reasonable size of coal pillar in the working face section is 7 m.
作者
张西寨
王文林
ZHANG Xizhai;WANG Wenlin(Shaanxi Huabin Coal Industry Co.,Ltd.,Xianyang 713500,China)
出处
《煤矿安全》
CAS
北大核心
2020年第10期168-172,共5页
Safety in Coal Mines
关键词
厚煤层
区段煤柱
煤体应力
现场实测
支承压力
上覆岩层
thick coal seam
section coal pillar
coal body stress
field measurement
abutment pressure
overlying strata
