Changcun Mine, Shanxi Lu'an Green Energy
Shanxi Provincial Science and
Technology Resources and Large Instrument Open Sharing Center
Hebei University of Engineering

针对上区段采空区边缘进行切顶卸压，采用数值模拟方法通过对比不同切顶高度下煤柱及巷道围岩卸压规律，分析巷道围岩与上区段采空区切断联系后覆岩中应力转移规律。结果表明：切顶卸压可实现巷道围岩应力的主动调控，切顶条件下与未切顶条件下，其应力分布及位移表现出完全相反的变化趋势，切顶不仅降低了巷道围岩的应力峰值，同时降低了其整体位移量。增大切顶高度后，应力峰值降低程度并不大。

In view of the roof cutting and pressure relief at the edge of the upper section of the goaf, numerical simulation method was used to analyze the stress transfer law in the overlying rock after the surrounding rock of the roadway was cut off from the upper section of the goaf by comparing the pressure relief law of the coal pillar and the surrounding rock of the roadway under different roof cutting heights. The results showed that the roof cutting and pressure relief could realize the active regulation of the stress of the surrounding rock of the roadway. Under the condition of roof cutting and no roof cutting, the stress distribution and displacement showed a completely opposite trend. The roof cutting not only reduced the stress peak of the surrounding rock of the roadway, but also reduced its overall displacement. And after increasing the cutting height, the peak stress was not greatly reduced.

陈宪伟1，石 媛2，吕 振3. 切顶条件下窄煤柱护巷围岩稳定性研究[J]. 煤炭与化工, 2024, 47(1): 18-21.

Chen Xianwei1, Shi Yuan2, Lv Zhen3. Study on surrounding rock stability of supporting roadway with narrow coal pillar under roof cutting condition. CCI, 2024, 47(1): 18-21.