摘要
以赵家寨煤矿11采区的开采条件为背景,研究11208工作面下副巷煤柱的合理宽度,运用理论计算对煤柱宽度进行确定。通过数值模拟方法研究了不同煤柱宽度在开巷前和开巷后对巷道周围煤岩力学参数、巷道变形及塑性区的影响规律。结合现场实际情况,综合分析得出窄煤柱宽度取5m时,巷道稳定性较好。通过进行三软厚煤层综放开采工作面窄煤柱留设研究,对提高回采率具有一定借鉴意义。
Based on the background of No. 11 mining area in Zhaojiazhai Mine, the reasonable widthis studied with theoretical calculation for transportation roadway coal pillar in 11208 working face. The influence rule of coal mechanical parameter around the entry,the entry deformation and the plastic range are studied with different size of coal piller before and after entry excavation using numerical simulation. According to site conditions, 5m width of coal pillar is the reasonable width,and the entry stability is favorable.
出处
《煤炭工程》
北大核心
2016年第9期64-67,共4页
Coal Engineering
关键词
三软煤层
沿空掘巷
煤柱宽度
数值模拟
three-soft thick seam
gob-side entry driving
width of coal pillar
numerical simulation
