文献类型：期刊文献

中文题名：跨石门开采巷内加强支护技术研究

英文题名：Research on strengthening support technology in roadway crosscut mining

作者：徐佑林 潘瑞凯 张瑞君

第一作者：徐佑林

机构：[1]贵州理工学院矿业工程学院,贵州贵阳550003;[2]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400030;[3]山西寿阳段王煤业集团有限公司,山西晋中045400

第一机构：贵州理工学院矿业工程学院

年份：2019

卷号：0

期号：8

起止页码：46-51

中文期刊名：煤炭科学技术

外文期刊名：Coal Science and Technology

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：国家自然科学基金资助项目(51764010,51874109);贵州省科技支撑计划资助项目(黔科合支撑[2019]2861);贵州省优秀青年科技人才培养计划资助项目(黔科合平台人才[2019]5674)

语种：中文

中文关键词：跨石门开采;底板巷道;加强支护;安全岩柱

外文关键词：crosscut mining;floor roadway;reinforced support;safety rock stratum

摘要：为解决工作面跨石门回采过程中出现的石门巷道变形量大、破坏严重的问题,采用理论分析方法对综采工作面跨石门开采时的顶板临界安全岩柱厚度和加强支护距离进行研究,结果表明:跨采期间,工作面和石门巷道之间的垂直距离越小,石门巷道的稳定性越差,反之,稳定性越好,特定的地质和采动条件下,工作面和石门之间存在临界安全岩柱厚度,可作为石门巷道加强支护和一般支护的分界线;巷内支护的临界安全岩柱厚度主要由工作面底板破坏深度、承载层厚度和巷道顶板破坏高度3个部分组成;采用岩体极限平衡理论、温克尔弹性地基梁理论和平衡拱理论,分别推导得出了工作面底板破坏深度、承载层厚度和巷道顶板破坏高度的计算公式,基于得到的临界安全岩柱厚度,可确定石门巷道内加强支护段的范围。以湾田煤矿11002回采工作面跨1490运输石门开采为例进行了工程应用。计算得出11002工作面底板破坏深度、承载层厚度和1490运输石门巷道顶板破坏高度分别为2.9、3.4、0.7 m,考虑一定的安全系数,最终取顶板临界安全岩柱厚度为10.5 m,需要加强支护的石门巷道距离为29 m,包括14 m的充填支护段和15 m的抬棚支护段。工程实践表明,跨采期间对运输石门采用充填支护和抬棚支护结合的加强支护方式既能保证巷道稳定,又能提高采出率,产生了可观的经济效益。
In order to solve the problem of large deformation and serious failure in rock crosscut over which working face cross,the theoretical analysis method was used to study the critical safety rock pillar thickness and strengthening support distance of the roof in the fully mechanized mining face.The results show that the stability of crosscut decrease with decrease in its vertical distance with respect to working face,and vice versa.For a given geo-mining condition,there is a critical safety rock pillar thickness between working face and crosscut,which can be used to determinate the span of reinforced support.The critical safety rock pillar thickness of the roadway support consisted of failure depth of working face floor,thickness of bearing stratum,and failure height of crosscut roof,and their calculation formulas were obtained using limit equilibrium theory of rock masses,Winkler elastic foundation beam theory,and equilibrium arch theory,respectively.Based on the obtained critical thickness of safety rock stratum,span of reinforced support in rock crosscut could then be determined.The engineering application was carried out with the No.11002 mining face of Wantian coal mine as an example,it is calculated that the failure depth of working face floor,thickness of bearing stratum,and failure height of crosscut roof were 2.9 m,3.4 m and 0.7 m,respectively.Considering a certain safety coefficient,the thickness of safety rock stratum was determined to be 10.5 m,and the span for required reinforced support was 29 m,including 14 m backfilling support and 15 m timber-lifting support.The engineering practice shows that reinforced support could not only ensure the roadway stability,but also increase the recovery rate and produce considerable economic benefits.