摘要
高河能源3号煤层工作面矿压显现强烈,以往采用的小煤柱沿空掘巷及柔模支护沿空留巷工艺,均存在巷道两帮变形大,底鼓严重问题。为了研究3号厚煤层工作面区段煤柱留设的合理宽度,以E1316工作面为研究对象,通过数值模拟分析了E1315采空区侧向支承压力分布规律,揭示了沿空巷道的合理留设尺寸。采用Gaddg公式理论验算了区段煤柱留设的合理性。结果表明,留设35 m的煤柱,能够避开采空区应力集中范围,保证巷道的稳定性。
The mining pressure of the No. 3 coal seam working face of Gaohe Energy was obvious, in the past, the small coal pillars along the goaf and the flexible mold support was adopted, there were large deformations in the roadway, with serious problems of the bottom drum. In order to study the reasonable width of coal pillars in the face of No.3 thick coal seam, the E1316 working face was taken as the research object. The distribution law of lateral bearing pressure in E1315 goaf was analyzed by numerical simulation, which revealed the reasonable retention of the roadway along the goaf. The rationality of the section coal pillar retention was verified by Gaddg formula theory. The results showed that the 35 m coal pillar could avoid the stress concentration range of the mining area and ensure the stability of the roadway.
作者
张永平
Zhang Yongping(Shanxi Gaohe Energy Corporation Ltd.,Changzhi 046000,China)
出处
《煤炭与化工》
CAS
2019年第10期29-32,35,共5页
Coal and Chemical Industry
关键词
厚煤层综放工作面
煤柱
变形失稳
尺寸优化
thick coal seam fully mechanized caving face
coal pillar
deformation instability
size optimization
