山东煤炭科技2025，Vol.43Issue(5)：49-54,6.DOI:10.3969/j.issn.1005-2801.2025.05.010
孤岛煤柱工作面沿空留巷围岩稳定性研究
Study on Surrounding Rock Stability of Retaining Roadway Along Goaf of Isolated Island Coal Pillar Working Faces
吕贵鹏1
作者信息
- 1. 山西焦煤西山煤电西曲矿,山西 太原 030200
- 折叠
摘要
Abstract
The deformation of the retaining roadway along goaf surrounding rock of the isolated island coal pillar in the deep well of Xiqu Coal Mine is severe,which affects the safe and efficient production of the coal mine.Based on FLAC3D numerical simulation software,a three-dimensional dynamic simulation analysis is conducted on the surrounding rock stability under different widths and strength parameters of the filling body.Combined with on-site monitoring data,the simulation results are compared and verified.The results indicate that the integration of high water filling materials and filling bag forming technology in the application of retaining roadway along goaf technology in isolated island coal pillar working faces ensures the close contact between the filling body and the roof;Combining the support strategy of"anchor rod-anchor cable composite support and roadway side filling bodies",the optimal width setting for the filling body is determined to be 4.0 m.The maximum subsidence amount of the roadway roof in coal pillars of the 14307 working face during the initial mining period is within 50 mm,and the deformation amplitude of the filling body sidewall is less than 40 mm;After 30 days of completion of the stoping operation,the subsidence amount of the roof does not exceed 20 mm,and the maximum deformation amount of the coal wall is only 150 mm,which verifies the good effect of retaining roadway along goaf technology scheme on surrounding rock stability control.关键词
孤岛/采煤/煤柱/模拟Key words
isolated island/coal mining/coal pillar/simulation分类
矿山工程引用本文复制引用
吕贵鹏..孤岛煤柱工作面沿空留巷围岩稳定性研究[J].山东煤炭科技,2025,43(5):49-54,6.
