摘要
基于不同压实程度下,矸石堆提供的支撑反力不同从而影响临空煤柱的稳定性这一事实,主要研究了矸石压缩的体积模量与压实率关系,利用FLAC3D数值模拟软件建立地层模型,在考虑到矸石区弹性模量变化的情况下,分析了不同压实率下,煤柱的应力分布规律,以及矸石堆的应力特征。在矸石与煤柱不同位置设置监测线,结果表明:随着矸石压缩率增加大,矸石堆应力回弹期逐渐缩短,而煤柱上垂直应力回弹速度也增快,同时煤柱应力峰值减小,但不同压实率下,煤柱竖直方向上不同位置应力变化趋势均基本相同。
Based on the fact that the different ground reaction forces from the gangues affect the stability of frontage coal pillars under different compacting degrees, the paper studies the relationship between the bulk modulus and compacting rate of gangue compression by establishing the stratum model with FLAC3Dnumerical simulation software, and analyzes the stress distribution of coal pillars and the stress characteristics of the gangue pile, taking into account the variation of the elastic modulus of the gangue area.
作者
郝晶
Hao Jing(Shanxi Lu'an Mining Industry Group Co., Ltd., Changzhi, Shanxi 046200)
出处
《江西煤炭科技》
2019年第2期136-138,共3页
Jiangxi Coal Science & Technology
关键词
矸石压缩
压实率
压力分布
数值模拟
gangue compression
compacting rate
pressure distribution
numerical simulation
