Li Xinlei, Huan Hengheng, Lin Haixiao, Li Zhenhua, Du Feng, Cao Zhengzheng, Fan Xuan, Ren Hao
Jiaozuo Coal Industry (Group) Xinxiang Energy Co., LTD, Xinxiang, 453000, Henan, China.
Henan Mine Water Disaster Prevention and Control and Water Resources Utilization Engineering Technology Research Center, Henan Polytechnic University, Jiaozuo, 454000, China.
Sci Rep. 2025 Aug 11;15(1):29440. doi: 10.1038/s41598-025-15115-4.
For the study of the layout of the roadway in the coal pillar and floor strata co-mining working face at the Zhaogu No.2 mine, a mechanical model of the segmental coal pillar within the working face was established through theoretical calculations. The analysis considered the stress state of the coal pillar area under different collapse conditions in the goaf after upper strata mining. Additionally, FLAC numerical simulation software was used to simulate the stress distribution in the roadway for different layout positions during strata mining, thereby clarifying the impact of working face mining on the side roadway of the segmental coal pillar. The results show that the collapse of the goaf after upper strata mining significantly affects the stress distribution in the coal pillar area. To ensure safety during mining, roadway excavation and working face recovery should be conducted after the upper strata have fully collapsed during strata mining. The co-mining working face roadway should be positioned beneath the original upper strata goaf, avoiding stress concentration areas in the coal pillar location. Ultimately, it is determined that the side roadway for the lower strata working face should be arranged with an offset of 10 m outward. Practical on-site experience has demonstrated that under this offset, there is minimal deformation of the surrounding rock in the coal pillar side roadway, meeting the safety production requirements of the working face.
为研究赵固二矿煤柱与底板岩层联合开采工作面巷道布置，通过理论计算建立了工作面内分段煤柱的力学模型。分析考虑了上覆岩层开采后采空区不同垮落条件下煤柱区域的应力状态。此外，利用FLAC数值模拟软件对岩层开采过程中不同布置位置巷道的应力分布进行模拟，从而阐明工作面开采对分段煤柱侧巷道的影响。结果表明，上覆岩层开采后采空区的垮落对煤柱区域应力分布有显著影响。为保证开采安全，应在上覆岩层开采充分垮落后进行巷道掘进和工作面回采。联合开采工作面巷道应布置在原上覆岩层采空区下方，避开煤柱位置的应力集中区。最终确定，下分层工作面的侧巷道应向外偏移10 m布置。现场实际经验表明，在此偏移量下，煤柱侧巷道围岩变形最小，满足工作面安全生产要求。
