中能煤业沿空掘巷厚煤层小煤柱护巷技术研究

Study on the Technology of Protecting Roadway with Small Coal Pillar in Thick Coal Seam of Gob-side Driving in Zhongneng Coal Industry

中能煤业区段煤柱宽度一般在20 m左右,造成煤炭资源的浪费,形成了应力集中。根据2305工作面地质条件、围岩特征以及周围开采情况,采用现场调查、理论分析、数值模拟和现场实践等方法,对2305工作面回风顺槽合理的小煤柱宽度和巷道支护方式进行系统研究,实现厚煤层留小煤柱掘进的巷道围岩稳定。

The width of coal pillar in Zhongneng Coal Industry section is generally about 20 m, which results in the waste of coal resources and the formation of stress concentration. According to the geological conditions, surrounding rock characteristics and surrounding mining situation of the 2305 working face, the reasonable width of small coal pillar and roadway support method in the 2305 working face are studied systematically by using the methods of onsite investigation, theoretical analysis, numerical simulation and field practice, so as to realize the stability of roadway surrounding rock driven by small coal pillar in thick coal seam.