摘要
为了研究近距离煤层开采合理巷道布置方法,以平沟煤矿为工程背景,采用理论分析与数值模拟相结合的方法,对遗留煤柱稳定性及其煤柱下应力分布特征进行了研究,进而确定了合理巷道布置位置。研究结果表明:20 m煤柱宽度所受均布载荷为4 MPa,小于煤柱的强度10.8 MPa,上部9号煤层工作面回采过后遗留的煤柱依然稳定;煤柱下垂直应力大小受上层煤遗留煤柱影响较大,巷道错开距离由15 m增加至19 m时,巷道位移平均降低量达59.4%,巷道错开距离由19 m增加至21 m时,巷道位移平均降低量达17.8%.确定巷道合理错开距离为19 m。
In order to study the reasonable roadway layout method in the contiguous seams,taking Pinggou Coal Mine as the engineering background,the stability of the coal pillar and the stress distribution under the coal pillar are studied by the method of combining theoretical analysis with numerical simulation,then the reasonable position of laneway is determined.The results show that the uniform load on the width of the 20 m coal pillar is 4 MPa,less than 10.8 MPa of the coal pillar,and the coal pillar remaining in the upper the No.9 coal seam is still stable after mining.The vertical stress of coal pillar is greatly influenced by the coal pillar left over from upper coal seam.When the stagger distance of roadway increases from 15 m to 19 m,the average displacement of roadway decreases by 59.4%,and the stagger distance of roadway increases from 19 m to 21 m,the average reduction of roadway displacement is 17.8%.The reasonable stagger distance is 19 m.
作者
赵宇德
ZHAO Yu de(Pinggou Coal Mine of Wuhai Energy Co.,Ltd.,in State Energy Group,Wuhai 016000,China)
出处
《煤》
2022年第2期26-29,共4页
Coal
基金
内蒙古自然科学基金(2019MS05053)。
关键词
近距离煤层
回采巷道
煤柱
数值模拟
contiguous seams
mining roadway
coal pillar
numerical simulation
