大采高窄煤柱沿空巷道围岩稳定性控制对策研究

Study on Surrounding Rock Stability Control Strategy of Gob-Side Entry with Narrow Pillar at Large Height Mining Face

以羊场湾矿130205大采高工作面沿空巷道为研究对象,综合现场调研、理论分析、力学建模、现场试验等方法,对大采高窄煤柱回采巷道破坏机理和支护技术进行了深入研究。分析了沿空巷道围岩的破坏过程及破裂区范围;提出了沿空巷道围岩控制的指导思想和以确保保护煤柱完整性、提高系统协调性、运用不对称支护结构为核心的支护理念。

Taking the gob-side entry of 130205 large height mining face as the research object, based on the field investigation, theoretical analysis, mechanical modeling and field test, the surrounding rock failure mechanism and supporting technology for the gob-side entry with large mining height are explored in depth. The failure process of surrounding rock and the range of fracture zone in the roadway along the goaf are analyzed. The guiding principle of controlling the surrounding rock of gob-side entry is put forward. The idea based on supporting the integrity of the coal pillar, improving the coordination of the supporting system and the asymmetric support structure is put forward.