异形巷道空顶区围岩稳定性及关键影响因素分析

TD322+.4; 针对某矿5煤层异形回采巷道,基于薄板理论得到异形巷道空顶距计算公式,分析了不同因素对空顶距的影响规律及权重,并采用FL AC3D数值模拟分析了不同因素对空顶区围岩变形特征及垂直应力分布的影响规律.研究结果表明:空顶区顶板的稳定性与抗拉强度、巷道半宽、顶板厚度、顶板倾斜角度、侧压系数及埋深有关,其中巷道宽度及薄板厚度是关键影响因素;根据5煤层地质条件,确定异型巷道的理论最大空顶距为3.653m,考虑安全系数实际最大空顶距不超过3m;数值模拟确定合理的支护强度及与巷道方向一致的最大水平应力分布方位,可为快速掘进提供有利条件.在3X51S掘进工作面进行现场应用,空顶距离达到2～3...

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Published in中国矿业 Vol. 31; no. 9; pp. 102 - 110
Main Authors 程宏波, 武超
Format Magazine Article
LanguageChinese
Published 榆林市榆阳区白鹭煤矿,陕西榆林719000%中国矿业大学(北京)能源与矿业学院,北京100083 01.09.2022
Subjects
掘进速度
围岩稳定性
数值模拟
异形巷道
空顶距
Online AccessGet full text
ISSN1004-4051
DOI10.12075/j.issn.1004-4051.2022.09.011

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Abstract TD322+.4; 针对某矿5煤层异形回采巷道,基于薄板理论得到异形巷道空顶距计算公式,分析了不同因素对空顶距的影响规律及权重,并采用FL AC3D数值模拟分析了不同因素对空顶区围岩变形特征及垂直应力分布的影响规律.研究结果表明:空顶区顶板的稳定性与抗拉强度、巷道半宽、顶板厚度、顶板倾斜角度、侧压系数及埋深有关,其中巷道宽度及薄板厚度是关键影响因素;根据5煤层地质条件,确定异型巷道的理论最大空顶距为3.653m,考虑安全系数实际最大空顶距不超过3m;数值模拟确定合理的支护强度及与巷道方向一致的最大水平应力分布方位,可为快速掘进提供有利条件.在3X51S掘进工作面进行现场应用,空顶距离达到2～3m,一定程度上提高了掘进速度,且巷道稳定后最大位移不超100mm,表明应用效果较好.
AbstractList TD322+.4; 针对某矿5煤层异形回采巷道,基于薄板理论得到异形巷道空顶距计算公式,分析了不同因素对空顶距的影响规律及权重,并采用FL AC3D数值模拟分析了不同因素对空顶区围岩变形特征及垂直应力分布的影响规律.研究结果表明:空顶区顶板的稳定性与抗拉强度、巷道半宽、顶板厚度、顶板倾斜角度、侧压系数及埋深有关,其中巷道宽度及薄板厚度是关键影响因素;根据5煤层地质条件,确定异型巷道的理论最大空顶距为3.653m,考虑安全系数实际最大空顶距不超过3m;数值模拟确定合理的支护强度及与巷道方向一致的最大水平应力分布方位,可为快速掘进提供有利条件.在3X51S掘进工作面进行现场应用,空顶距离达到2～3m,一定程度上提高了掘进速度,且巷道稳定后最大位移不超100mm,表明应用效果较好.
Author 武超
程宏波
AuthorAffiliation 榆林市榆阳区白鹭煤矿,陕西榆林719000%中国矿业大学(北京)能源与矿业学院,北京100083
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CHENG Hongbo
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围岩稳定性
数值模拟
异形巷道
空顶距
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Snippet TD322+.4; 针对某矿5煤层异形回采巷道,基于薄板理论得到异形巷道空顶距计算公式,分析了不同因素对空顶距的影响规律及权重,并采用FL AC3D数值模拟分析了不同因素对空顶区围...
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StartPage 102
Title 异形巷道空顶区围岩稳定性及关键影响因素分析
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