摘要
为进一步提高矿井煤炭资源回收率,改善巷道所处的应力环境,文章采用理论计算和数值模拟的方法,分析确定了沿空掘巷护巷煤柱宽度为5 m,提出了小煤柱沿空掘巷护巷高预应力强力支护技术方案,并进行了现场实践。得出回采过程中顶板最大沉降量为19.7 mm,两帮最大收敛量为26.2 mm的结论,实现了工作面回采期间运输巷围岩的稳定与安全。
In order to further improve the recovery rate of coal resources and improve the stress environment of the roadway,the width of coal pillar supporting roadway along the goaf is determined to be 5 m by theoretical calculation and numerical simulation,and the high-prestressed strong support technology scheme of small coal pillar supporting roadway along the goaf is put forward,and the field practice is carried out.It is concluded that the maximum settlement of roof is 19.7 mm and the maximum convergence of two sides is 26.2 mm in the stoping process,which achieves the stability and safety of surrounding rock of transport roadway during the stoping of working face.
作者
罗新旗
LUO Xin-qi(Inner Mongolia Tongmei Erdos Mining Investment Co., Ltd.,Erdos 017000,China)
出处
《煤》
2022年第6期7-10,70,共5页
Coal
基金
国家自然科学基金资助项目(52064043,51764044)。
关键词
浅埋深
软岩
小煤柱
数值模拟
支护技术
shallow buried depth
soft rock
small coal pillar
numerical simulation
support technology
