煤矿安全2019，Vol.50Issue(5)：273-276,280,5.DOI:10.13347/j.cnki.mkaq.2019.05.065
近距离煤层不规则遗留煤柱下回采巷道围岩稳定性研究
Study on Surrounding Rock Stability of Mining Roadway Under Irregular Coal Pillar of Close Distance Coal Seams
商和福 1宁建国 1杨尚 1姜宁 1邱鹏奇 1徐强1
作者信息
- 1. 山东科技大学 矿山灾害预防与控制国家重点实验室培育基地,山东 青岛 266590
- 折叠
摘要
Abstract
In view of the problems of poor integrity and support difficulties in mining roadway under the upper stratified irregular coal pillar, taking 20314 auxiliary roadway of a coal mine in Inner Mongolia as engineering background. According to the actual mining conditions of the coal seam, FLAC3D software was used to simulate and study the change rule of vertical stress of roadway under irregular coal pillar after mining in upper and lower coal seam working face. The results show that the vertical stress concentration occurs in the area of triangular rock stratum left between the goafs after mining the upper and lower coal seams. The roadway under the remaining coal pillar is affected by both the lateral supporting pressure and the upper residual pillar supporting pressure. When the vertical stress is greater than the peak compressive strength of the coal body in the roadway, the roadway is damaged.关键词
不规则遗留煤柱/近距离煤层/支承压力/数值模拟/垂直应力Key words
irregular coal pillar/close distance coal seams/supporting prossure/numerical simulation/vertical stress分类
矿业与冶金引用本文复制引用
商和福,宁建国,杨尚,姜宁,邱鹏奇,徐强..近距离煤层不规则遗留煤柱下回采巷道围岩稳定性研究[J].煤矿安全,2019,50(5):273-276,280,5.
