摘要
以赵楼煤矿断层下盘一侧采空的11303(东)工作面地质条件为背景,采用FLAC^(3D)软件模拟分析了断层下盘工作面背向断层推进时,断层煤柱应力、工作面中部及采空侧端头超前支承应力演化规律。研究表明:工作面推进小于120 m时,断层煤柱应力集中程度逐渐增大,随工作面继续推进,断层煤柱集中应力变化不大。工作面推进小于80 m时,工作面中部超前支承应力峰值逐渐增大,而超过80 m后应力峰值变化不大。工作面采空侧端头受采动及相邻采空区影响,超前支承应力远大于实体煤侧,且在推进170 m时支承应力峰值达到最大。
Based on the geological conditions of 11303（east） working face which is in the footwall with the one-side goaf in Zhaolou Coal Mine, the evolution laws of fault coal-pillar stress, the front abutment stress of the middle and the face end of the goaf-side are simulated and analyzed when the working face advances away from the fault by utilizing the FLAC^（3D）simulation software. Results show that the stress value of fault coal-pillar rises gradually when the working face advances less than 120 m and it has little change with the working face advancing unceasingly. The front abutment stress value of working face increases gradually when the working face advances less than 80 m, while it keeps constant when the working face advances more than 80 m. Due to the effect of the mining and the adjacent goaf, the front abutment stress of the face end on the goaf-side is more than the other end and the peak value reaches to maximum when the working face advances 170 m.
出处
《煤矿安全》
北大核心
2017年第7期62-65,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(51574155)
泰安市科技发展计划资助项目(2015ZC1058)
山东科技大学矿业学院学生科技创新基金资助项目(KYKC17008)
关键词
断层下盘
一侧采空
断层煤柱
采动应力
数值模拟
fault footwall
one side goaf
coal pillar
mining stress
numerical simulation
