摘要
长治三元中能煤业有限公司2305工作面回风顺槽采用8 m煤柱护巷,依据现场条件并结合工程类比法确定锚网索支护方案,提出通过切顶卸压方式降低回风顺槽应力集中程度,对围岩支护方案以及切顶卸压技术方案进行设计。结果表明,采用的围岩支护及卸压方案可实现2305工作面回风顺槽围岩有效控制,顶底板、巷帮最大位移量分别为350 mm、290 mm。
In the 2305 working face of Changzhi Sanyuan Zhongneng Coal Industry,8 m coal pillar is used to protect the roadway.According to the field conditions and combined with the engineering analogy method,the anchor mesh cable support scheme is determined,and it is proposed that the stress concentration of the return air along the trough can be reduced by roof cutting and relieving pressure.The surrounding rock support scheme and the technical scheme of roof cutting and pressure relief are designed.The results show that the surrounding rock support and pressure relief scheme can effectively control the surrounding rock of the return air along the trough in the 2305 working face,and the maximum displacement of roof and floor and roadway is 350 mm and 290 mm respectively.
作者
李文涛
Li Wentao(Jinneng Holding Coal Industry Group Changzhi Sanyuan Zhongneng Coal Industry Co.,Ltd.,Shanxi Changzhi 046000)
出处
《山东煤炭科技》
2022年第8期70-73,共4页
Shandong Coal Science and Technology
关键词
厚煤层
采煤
小煤柱
切顶
thick coal seam
coal mining
small coal pillar
roof cutting
