
第39卷第2期 2017年2月
能源与环保
China Energy and Environmental Protection
VoL 39No.2
Feb.
2017
孤岛工作面动压巷道锚杆支护数值模拟研究
刘春刚
(煤科集团沈阳研究院有限公司,辽宁沈阳110000)
摘要:针对孤岛工作面动压巷道锚杆支护间题,以镇城底矿为研究背景,采用有限差分数值模拟 FLAC3P软件,研究了该矿22613轨道巷受力特征和围岩的变形情况,镇城底矿的南六采区22613工作面与其相邻的22611工作面相距20m,而工作面采空区的稳定需要一段时间,在22613工作面的轨道巷服务期间,22611工作面采空区还未完全稳定,顶板岩层活动产生的残余支承压力将会对22613轨道巷产生显著的影响,增加了巷道支护的难度。依据巷道支护理论设计了合理的加固支护方案,研究表明:加强巷道两帮的支护,同时降低起锚高度,能够有效减少由于应力而引起的巷道底鼓间题,为殖岛工作面动压巷道锚杆支护设计提供了指导意义。
关键词:孤岛工作面;动压巷道;锚杆支护;数值模拟;支承压力
中图分类号:TD353
文献标志码:A
文章编号:10030506(2017)02016904
Study on numerical simulation of bolt supporting in dynamic pressure roadway on island coal face
Liu Chungang
(CCTEG Shenyang Research Instinute,Shengyang 110000,China)
Abstract:To study the bolt supporing problems of dynamic pressure roadway on island face,taking Zhenchengdi mine as the studying background,by applying FLAC* numerical sofware,and taking 22613 track roadway as the research object,the stress and defomation characleristics of surrounding rock were studied. The distance of 22613 working face and adjacent 22611 working face is 20 m,and the gob of 22611 working face is not stable,so,residual abutment pressure induced by strata activities of roof can have great influences on 22613 track roadway,which has improved the dificuly of roadway supporting, Aceording to the theory of roadway supporting,reasonable supporing scheme was designed. Research has shown that,strengthen the supporting of wo sides of roadway,while reducing the height of the anchor,can effectively reduce the roadway floor heave problems due to stress,which provides the guiding significance for the de sign of the bolt support in the dynamic roadway.
Keywords island coal face;dynamic pressure tunnel;bolt supporting;numerical simulation;abutment pressure
0引言
动压巷道支护一直是困扰着煤矿安全生产的关键难题,国内外许多学者对动压巷道支护进行了大量研究,得出了一些成果,郑百生等]研究了近距离孤岛工作面动压影响巷道围岩控制,提出了控制巷道围岩的空间斜拉锚索的支护方案。杨坤(2)]研究了孤岛工作面临空巷道U型钢一锚网索耦合支护:王文庆3)对孤岛工作面底板近距离巷道合理加
固支护技术研究;肖宾[4)提出了深部非对称孤岛工作面沿空送巷支护技术;华心祝3]等对孤岛工作面沿空掘巷矿压特征进行了研究并进行了工程应用,采用FLAC"软件研究孤岛工作面沿空掘超前支承压力分布特征。通过建立孤岛工作面沿空掘巷基本顶的力学模型,推导出受动压影响时巷道顶板下沉量的计算公式。孤岛工作面超前支承压力增加明显,孤岛工作面沿空掘巷围岩变形量剧增,其支护难度大大增加。在获得以上研究结果的基础上,分别
收稿日期:2016-12-01;贵任编辑:陈朋吾
DOI;10, 19389/j. enki. 1003 0506. 2017. 02. 036
作者简介:刘券刚(1982一),男,河北承德人,助理研究员,2007年毕业于华北科技学院,研究方向为矿井瓦斯治理与防治。引用格式:刘春刚.摄岛工作面动压巷道错杆支护数值模拟研究[J].能源与环保,2017,39(2):169-172,178.
Liu Chungang, Study on numerical simulation of bolt supporting in dynamie pressure roadway on island coal fae[J]. China Energy and Emsi-ronmental Protection,2017,39(2) : 169-172,178.
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