摘要
针对寨崖底矿煤柱下回采巷道失稳问题,通过理论分析、数值模拟和现场实测等方法,分析了寨崖底矿煤柱下煤层巷道的破坏机理。得出了上煤层工作面回采后,遗留煤柱底板应力分布规律。发现煤柱下煤层高应力集中区围岩受工作面采动动载高应力扰动出现垂直应力峰值增大、应力集中区范围增加、非对称应力场,是此类巷道大变形破坏的根本原因,且预测采动影响范围为工作面前方60 m至后方130 m。
Based on gateroad instability problem under barrier pillar in Zhaiyadi coal mine,by theoretical analysis, numerical simulation and field measurement methods, mechanism of surrounding rock failure in seam roadway under barrier pillar is analyzed, floor stress distribution law of barrier pillar is gotten after panel of upper coal seam is mined. Found that surrounding rock is affected by panel mining with high dynamic load in high stress concentrating area under barrier pillar, in which appears vertical stress peak increasing, stress concentration area increasing and the the key reasons for large deformation and failure in such gateroad. as in front of the panel 60 m to behind the panel 130 m.
出处
《煤炭技术》
CAS
北大核心
2017年第1期1-3,共3页
Coal Technology
基金
煤炭科学研究总院科技创新青年基金项目(2016ZYQN004)
国家自然科学基金项目(51474209)
关键词
煤层巷道
采动应力
遗留煤柱
seam roadway
mining pressure
barrier pillar asymmetric stress field, which are Mining influence area is predicted
