沿空掘巷窄煤柱合理尺寸模拟分析

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英文篇名：Simulating analysis of reasonable size of narrow pillar in gob-side driving roadway 作者：张瑾 英文作者：ZHANG Jin;Lingshi Coal Mine Safety Supervision and Inspection Team; 关键词：沿空掘巷 ; 窄煤柱 ; 合理尺寸 ; 数值模拟 英文关键词：roadway driving along goaf;;narrow coal pillar;;reasonable size;;numerical simulation 中文刊名：SDHW 英文刊名：Shanxi Chemical Industry 机构：灵石县煤矿安全监管巡查队; 出版日期：2019-04-15 出版单位：山西化工 年：2019 期：v.39;No.180 语种：中文; 页：SDHW201902041 页数：4 CN：02 ISSN：14-1109/TQ 分类号：109-112

摘要

为了确定3上411工作面与3上408工作面之间沿空掘巷窄煤柱合理尺寸,利用FLAC3D数值模拟软件,结合井下实际工况条件,建立了煤柱尺寸分别为3、4、5、6、7、8、9、10m8种不同宽度的窄煤柱模型进行计算,分别分析研究沿空巷道和窄煤柱内垂直应力和剪应力以及沿空巷道的围岩变形量。研究结果表明,窄煤柱向采空侧位移先增大后逐渐减小,且在窄煤柱宽度为5m时,煤柱向采空区侧的水平位移达到最大值,为192.7mm;底鼓量最大值发生在窄煤柱宽度为3m时,最大值为47.57mm;巷道沿空帮位移先增大后减小,且在煤柱宽度为5m～6m时达到最大值;通过模拟监测数据分析确定出最终合理煤柱的尺寸为3.8m。
        In order to determine the reasonable size of narrow pillars in gob-side drivage roadway between 3 upper 411 working face and 3 upper 408 working face,using FLAC3 Dnumerical simulation software and considering the actual working conditions of underground,eight models of narrow pillars with different sizes of 3,4,5,6,7,8,9 and 10 mwere established to calculate,and the vertical stress and shear stress in gob-side roadway and narrow pillar were analyzed and analyzed respectively,and the surrounding rock deformation of gob-side roadway.The results show that the displacement of narrow coal pillar to goaf side increases first and then decreases gradually,and when the width of narrow coal pillar is 5 m,the horizontal displacement of coal pillar to goaf side reaches the maximum value,192.7 mm;when the width of narrow coal pillar is 3 m,the maximum value of floor heave is 47.57 mm;the displacement of roadway along goaf first increases and then decreases,and reaches the maximum value when the width of coal pillar is 5 mto 6 m.Through the analysis of simulated monitoring data,the final reasonable size of coal pillar is determined to be 3.8 m.

引文

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