202310
放顶煤开采下围岩稳定性研究
姚士茂
（国能神东煤炭布尔台煤矿，内蒙古 鄂尔多斯 017000）
摘要： 为了厘清布尔台煤矿42204 综放工作面来压规律，基于FLAC3D数值模拟分析了剪切应力的变化规律。实际来
压规律监测中，选择支架压力作为分析对象，发现与工作面距离小于70 m时，支架整体处于稳定状态；工作面推进至
71.3 m时，工作面来压特征明显，来压持续长度16.9 m；原ZQL2X16280/19/35D 型液压支架可维持巷道的稳定性。
关键词： 数值模拟；剪切应力；支架压力；来压特征；巷道稳定性
中图分类号： TD322 文献标志码： A 文章编号： 2095-0802-(2023)10-0192-03
Stability of Surrounding Rock in Top Coal Caving Mining
YAO Shimao
(Buertai Coal Mine, CHN Energy Shendong Coal Group Co., Ltd., Ordos 017000, Inner Mongolia, China)
Abstract: In order to clarify the pressure law of 42204 fully mechanized top coal caving face in Buertai Coal Mine, the change
law of shear stress was analyzed based on FLAC3D numerical simulation. In the actual pressure law monitoring, the support
pressure was selected as the analysis object. It was found that when the distance between the support and the working face was
less than 70 m, the support was in a stable state as a whole; when the working face advanced to 71.3 m, the pressure characteristics
of the working face were obvious, and the pressure duration was 16.9 m; the original ZQL2X16280/19/35D hydraulic support can
maintain the stability of the roadway.
Key words: numerical simulation; shear stress; support pressure; pressure characteristics; roadway stability
