两次采动影响下小煤柱巷道切顶卸压围岩控制技术被引量：9

Surrounding rock control technology of roof cutting for pressure relief in small coal pillar roadway under secondary mining

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摘要为解决多次采动影响下留小煤柱巷道矿压显现剧烈、围岩变形量大的问题,提出了“切顶卸压+顶、帮锚索补强”联合控制技术。以贾家沟煤矿10115运输巷为工程背景,分析了切顶卸压位置、高度与巷道围岩垂直应力分布的关系,给出切顶卸压关键参数,并研究了留小煤柱巷道在切顶卸压后受两次采动影响下的矿压显现规律。结果表明:切顶卸压后,煤柱上的应力峰值随切顶深度的增加呈指数降低;10115运输巷在邻近工作面一次采动过程中巷道围岩变形依次呈现出无变形、缓慢变形、快速变形和围岩稳定的变化规律,本工作面二次采动过程中巷道围岩变形依次呈现出明显变形和剧烈变形的规律;巷道围岩在受二次采动影响时变形更加剧烈,巷道变形量为一次采动时的3.0~7.5倍。 In order to solve the problems of severe rock pressure and large deformation of surrounding rock in the roadway with small coal pillar under the influence of multiple mining,a technology combined cutting roof for pressure relief with top and side cable reinforcement was proposed.Taking the 10115 headentry of Jiajiagou Coal Mine as the research object,the relationship between the location and height of cutting roof for pressure relief and the vertical stress distribution of the surrounding rock of the roadway was analyzed,and the key parameters of cutting roof for pressure relief were given.The strata behaviors of the roadway with small coal pillar was studied under the influence of two mining movements after cutting roof for pressure relief.The results show that the peak stress of the coal pillar decreases exponentially with the increase of the roof cutting depth.In the adjacent working face mining process of 10115 headentry,also called the primary mining,roadway surrounding rock deformation changes from no deformation,slow deformation,rapid deformation to stability in turn.In the own working face mining process of 10115 headentry,called the second mining,the roadway surrounding rock deformation changes from apparent deformation to severe deformation.The deformation of the roadway surrounding rock in the secondary mining is much larger than that in the primary mining,about from 3.0 to 7.5 times.

作者李汉璞张百胜郭俊庆杨依卓崔俊彪 LI Hanpu;ZHANG Baisheng;GUO Junqing;YANG Yizhuo;CUI Junbiao(School of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区太原理工大学矿业工程学院太原理工大学原位改性采矿教育部重点实验室

出处《矿业安全与环保》 CAS 北大核心 2024年第2期90-97,共8页 Mining Safety & Environmental Protection

基金山西省重点研发计划项目(201903D121075) 山西省应用基础研究计划面上项目(20210302123148)。

关键词切顶卸压小煤柱矿压显现二次采动综放工作面围岩控制 cutting roof for pressure relief small coal pillar strata behaviors secondary mining fully mechanized caving face surrounding rock control

分类号 TD323 [矿业工程—矿井建设]

作者简介李汉璞(1995-),男,河北邢台人,硕士研究生,主要从事矿山压力与岩层控制方面的研究工作。E-mail:lhp573707181@126.com。