本文主要研究内容
作者万通(2019)在《发耳煤矿近距离煤层群重复采动大巷修复加固技术研究》一文中研究指出:在近距离煤层群重复开采过程中,上层煤开采留设的护巷煤柱将产生应力集中区,并在底板岩层中进行传递,煤层群底板巷道受多次采动影响较大,巷道围岩变形较明显,因此系统研究近距离煤层重复采动下巷道围岩控制技术具有一定的理论指导意义。本文以贵州六盘水市发耳煤矿+980水平轨道大巷为工程背景,根据现场实际开采及巷道支护情况,确定了巷道围岩变形特征及围岩岩性,分析得到巷道破坏变形原因,结合巷道支护理论,提出了近距离煤层群重复采动巷道修复加固技术,并采用理论分析、数值模拟及现场工业性试验等方法,对巷道修复加固及大巷保护煤柱合理留设问题进行了系统研究,主要研究成果如下:(1)根据巷道变形特征及破坏原因,基于支护弱结构部位加强支护原理,提出了高性能锚杆、小孔径预应力锚索及注浆加固等联合支护的巷道围岩控制技术。针对多煤层开采对底板巷道的重复采动影响,建立了近距离煤层开采底板应力传递力学模型,为大巷保护煤柱留设问题提供一定的理论依据。(2)利用现场调研及理论计算初步确定巷道修复加固参数,通过采用数值模拟软件Phase对巷道在不同支护方案下的巷道围岩控制效果进行对比分析,确定合理的修复加固方案,并在现场进行应用。(3)根据现场实际情况及煤层赋存条件,采用数值模拟软件FLAC3D对相同宽度煤柱留设、不同宽度煤柱间隔留设和卸压等方案进行模拟,通过分析模拟结果,得出在卸压条件下近距离煤层群的采动对巷道影响最小,对比1煤卸压和3煤卸压效果可知,在1煤卸压的条件下轨道大巷受多煤层采动产生的应力影响更小。(4)通过工业性试验,对确定的修复加固方案进行了试验,取得了成功的应用,巷道围岩变形得到了很好的控制,其巷道深部位移和表面位移增量在整体监测数据中呈下降趋势,直至基本保持稳定,该修复加固方案提高了巷道围岩整体的稳定性,达到了预期的支护效果。
Abstract
zai jin ju li mei ceng qun chong fu kai cai guo cheng zhong ,shang ceng mei kai cai liu she de hu hang mei zhu jiang chan sheng ying li ji zhong ou ,bing zai de ban yan ceng zhong jin hang chuan di ,mei ceng qun de ban hang dao shou duo ci cai dong ying xiang jiao da ,hang dao wei yan bian xing jiao ming xian ,yin ci ji tong yan jiu jin ju li mei ceng chong fu cai dong xia hang dao wei yan kong zhi ji shu ju you yi ding de li lun zhi dao yi yi 。ben wen yi gui zhou liu pan shui shi fa er mei kuang +980shui ping gui dao da hang wei gong cheng bei jing ,gen ju xian chang shi ji kai cai ji hang dao zhi hu qing kuang ,que ding le hang dao wei yan bian xing te zheng ji wei yan yan xing ,fen xi de dao hang dao po huai bian xing yuan yin ,jie ge hang dao zhi hu li lun ,di chu le jin ju li mei ceng qun chong fu cai dong hang dao xiu fu jia gu ji shu ,bing cai yong li lun fen xi 、shu zhi mo ni ji xian chang gong ye xing shi yan deng fang fa ,dui hang dao xiu fu jia gu ji da hang bao hu mei zhu ge li liu she wen ti jin hang le ji tong yan jiu ,zhu yao yan jiu cheng guo ru xia :(1)gen ju hang dao bian xing te zheng ji po huai yuan yin ,ji yu zhi hu ruo jie gou bu wei jia jiang zhi hu yuan li ,di chu le gao xing neng mao gan 、xiao kong jing yu ying li mao suo ji zhu jiang jia gu deng lian ge zhi hu de hang dao wei yan kong zhi ji shu 。zhen dui duo mei ceng kai cai dui de ban hang dao de chong fu cai dong ying xiang ,jian li le jin ju li mei ceng kai cai de ban ying li chuan di li xue mo xing ,wei da hang bao hu mei zhu liu she wen ti di gong yi ding de li lun yi ju 。(2)li yong xian chang diao yan ji li lun ji suan chu bu que ding hang dao xiu fu jia gu can shu ,tong guo cai yong shu zhi mo ni ruan jian Phasedui hang dao zai bu tong zhi hu fang an xia de hang dao wei yan kong zhi xiao guo jin hang dui bi fen xi ,que ding ge li de xiu fu jia gu fang an ,bing zai xian chang jin hang ying yong 。(3)gen ju xian chang shi ji qing kuang ji mei ceng fu cun tiao jian ,cai yong shu zhi mo ni ruan jian FLAC3Ddui xiang tong kuan du mei zhu liu she 、bu tong kuan du mei zhu jian ge liu she he xie ya deng fang an jin hang mo ni ,tong guo fen xi mo ni jie guo ,de chu zai xie ya tiao jian xia jin ju li mei ceng qun de cai dong dui hang dao ying xiang zui xiao ,dui bi 1mei xie ya he 3mei xie ya xiao guo ke zhi ,zai 1mei xie ya de tiao jian xia gui dao da hang shou duo mei ceng cai dong chan sheng de ying li ying xiang geng xiao 。(4)tong guo gong ye xing shi yan ,dui que ding de xiu fu jia gu fang an jin hang le shi yan ,qu de le cheng gong de ying yong ,hang dao wei yan bian xing de dao le hen hao de kong zhi ,ji hang dao shen bu wei yi he biao mian wei yi zeng liang zai zheng ti jian ce shu ju zhong cheng xia jiang qu shi ,zhi zhi ji ben bao chi wen ding ,gai xiu fu jia gu fang an di gao le hang dao wei yan zheng ti de wen ding xing ,da dao le yu ji de zhi hu xiao guo 。
论文参考文献
论文详细介绍
论文作者分别是来自中国矿业大学的万通,发表于刊物中国矿业大学2019-07-18论文,是一篇关于近距离煤层群论文,支护弱结构论文,保护煤柱论文,巷道围岩控制论文,中国矿业大学2019-07-18论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自中国矿业大学2019-07-18论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:近距离煤层群论文; 支护弱结构论文; 保护煤柱论文; 巷道围岩控制论文; 中国矿业大学2019-07-18论文;