摘要
上保护层开采是突出煤层群矿井防治下伏煤岩体煤与瓦斯突出的有效技术措施之一。为了研究确定上保护层工作面煤柱留设的合理宽度,基于陕北某矿井21采区的下3薄煤层上保护层为工程背景,以保护层所留设煤柱的自身稳定性及对下伏煤岩的卸压增透效果为研究基础,通过理论分析和数值模拟相结合的研究方法,综合考虑矿井安全生产及经济效益方面因素,优化确定下3薄煤层保护层留设煤柱的合理宽度为15~20 m。
The mining of the upper protective layer is one of the effective technical measures for preventing and controlling coal and gas outbursts in the underlying coal rock mass of coal seam group mines.In order to study and determine the reasonable width of the coal pillars left in the working face of the upper protective layer,based on the engineering background of the upper protective layer of the lower 3 thin coal seam in the No.21 mining area of a mine in northern Shaanxi,the stability of the coal pillars left in the protective layer and the pressure relief and permeability enhancement effect on the underlying coal rock were studied.Through a combination of theoretical analysis and numerical simulation,the reasonable width of the coal pillars left in the lower 3 thin coal seam protective layer was optimized and determined to be 15-20 m,taking into account factors related to mine safety production and economic benefits.
作者
蔡明华
CAI Minghua(Shaanxi Energy Fengjiata Mining Operation Co.,Ltd.,Yulin 719000,China)
出处
《煤炭科技》
2024年第4期98-102,111,共6页
Coal Science & Technology Magazine
关键词
突出煤层群
上保护层
煤柱
卸压增透
prominent coal seam group
upper protective layer
coal pillar
pressure relief and permeability enhancement
