本文主要研究内容
作者申浩（2019）在《永宁煤矿上行开采可行性及巷道合理位置研究》一文中研究指出：近年来我国经济飞速发展,其中煤炭作为能源结构中的重要一环,对经济的发展起到了重要的作用。山西吕梁离石永宁煤业由于以往地质勘查不详,将3#煤层划为不可采煤层,目前的开采实践表明,已采4#煤上部3#煤可布置回采工作面。但由于受到4#煤层的采动影响,层间岩层受到一定程度的破坏,且3#煤下方部分区域为采空区,巷道布置情况受下组煤开采影响,因此上组煤是否可采以及工作面回采巷道的合理位置如何确定是一个难题。本文采用理论分析、数值模拟、现场实践的方法对上组煤开采可行性与工作面巷道的合理位置进行了研究,研究结果如下:(1)分析了近距离煤层层间岩层结构,将层间岩层结构以有无控制岩层为条件分为层间无主控岩层结构、层间单一主控岩层结构以及层间多主控岩层三种类别,并根据层间岩层物理力学特性,计算了永宁煤矿近距离煤层层间各岩层载荷及破断规律,确定永宁煤矿下组4#煤层顶板第8层砂质泥岩为控制岩层,即永宁煤矿近距离煤层是属于层间单一主控岩层结构。以此为基础,采用“三带”判别法、围岩平衡判别法以及比值判别法三种理论方法,确定永宁煤业3#煤层可采用上行开采方式。(2)通过FLAC3D三维数值模拟软件分析了永宁煤业4#煤层不同工作面长度回采时对3#煤层的影响,研究结果表明4#煤开采后会对3#煤局部位置产生影响,但未贯通整个煤层,煤层仍具有一定连续性,因此确定3#煤可采用上行开采方式。(3)采用理论分析与现场实测的方法,研究了永宁煤业近距离煤层下组煤开采后层间岩层垮落及裂隙发育特征,对层间距与下组煤裂隙带分区关系进行了分类,并基于现场窥视结果确定永宁煤矿3#煤层位于4#煤层裂隙带内一般断裂区内,回采工作面巷道位置应避开裂隙发育区与应力增高区。(4)通过数值模拟分析方法,确定了4#煤开采后,3#煤层内的应力集中区域。在工作面倾斜方向上,应力集中区域为采空区煤壁帮侧6.5~25.3m、采空区内9.1~46.9m,与4#煤层工作面分别为外错和内错关系。在工作面推进方向上,应力集中峰值点位于4#煤层开切眼后方10m处,而在4#煤层开切眼位置前方距离大于6m范围内,煤层内应力均低于原岩应力。(5)对上组3#煤首采4207工作面巷道布置方案与支护方案进行了设计,4207工作面回风巷采用外错布置方式,外错距离为2m;运输巷道采用内错布置方式,内错距离为3m,4207工作面开切眼布置在下组煤工作面开切眼超前6m位置处。巷道采用锚杆+锚索+金属网联合支护方式。(6)在方案确定后对巷道掘进至150m内的围岩变形量进行了监测,确定巷道掘进影响范围约为30m,围岩变形量整体较小,围岩控制情况较好。截止到2018年12月,永宁煤矿3#煤层已成功回采4个工作面,并且回采过程中未出现明显的矿压显现情况,经济效益具有明显的提升,表明本文研究结果具有较好的应用效果。
Abstract
jin nian lai wo guo jing ji fei su fa zhan ,ji zhong mei tan zuo wei neng yuan jie gou zhong de chong yao yi huan ,dui jing ji de fa zhan qi dao le chong yao de zuo yong 。shan xi lv liang li dan yong ning mei ye you yu yi wang de zhi kan cha bu xiang ,jiang 3#mei ceng hua wei bu ke cai mei ceng ,mu qian de kai cai shi jian biao ming ,yi cai 4#mei shang bu 3#mei ke bu zhi hui cai gong zuo mian 。dan you yu shou dao 4#mei ceng de cai dong ying xiang ,ceng jian yan ceng shou dao yi ding cheng du de po huai ,ju 3#mei xia fang bu fen ou yu wei cai kong ou ,hang dao bu zhi qing kuang shou xia zu mei kai cai ying xiang ,yin ci shang zu mei shi fou ke cai yi ji gong zuo mian hui cai hang dao de ge li wei zhi ru he que ding shi yi ge nan ti 。ben wen cai yong li lun fen xi 、shu zhi mo ni 、xian chang shi jian de fang fa dui shang zu mei kai cai ke hang xing yu gong zuo mian hang dao de ge li wei zhi jin hang le yan jiu ,yan jiu jie guo ru xia :(1)fen xi le jin ju li mei ceng ceng jian yan ceng jie gou ,jiang ceng jian yan ceng jie gou yi you mo kong zhi yan ceng wei tiao jian fen wei ceng jian mo zhu kong yan ceng jie gou 、ceng jian chan yi zhu kong yan ceng jie gou yi ji ceng jian duo zhu kong yan ceng san chong lei bie ,bing gen ju ceng jian yan ceng wu li li xue te xing ,ji suan le yong ning mei kuang jin ju li mei ceng ceng jian ge yan ceng zai he ji po duan gui lv ,que ding yong ning mei kuang xia zu 4#mei ceng ding ban di 8ceng sha zhi ni yan wei kong zhi yan ceng ,ji yong ning mei kuang jin ju li mei ceng shi shu yu ceng jian chan yi zhu kong yan ceng jie gou 。yi ci wei ji chu ,cai yong “san dai ”pan bie fa 、wei yan ping heng pan bie fa yi ji bi zhi pan bie fa san chong li lun fang fa ,que ding yong ning mei ye 3#mei ceng ke cai yong shang hang kai cai fang shi 。(2)tong guo FLAC3Dsan wei shu zhi mo ni ruan jian fen xi le yong ning mei ye 4#mei ceng bu tong gong zuo mian chang du hui cai shi dui 3#mei ceng de ying xiang ,yan jiu jie guo biao ming 4#mei kai cai hou hui dui 3#mei ju bu wei zhi chan sheng ying xiang ,dan wei guan tong zheng ge mei ceng ,mei ceng reng ju you yi ding lian xu xing ,yin ci que ding 3#mei ke cai yong shang hang kai cai fang shi 。(3)cai yong li lun fen xi yu xian chang shi ce de fang fa ,yan jiu le yong ning mei ye jin ju li mei ceng xia zu mei kai cai hou ceng jian yan ceng kua la ji lie xi fa yo te zheng ,dui ceng jian ju yu xia zu mei lie xi dai fen ou guan ji jin hang le fen lei ,bing ji yu xian chang kui shi jie guo que ding yong ning mei kuang 3#mei ceng wei yu 4#mei ceng lie xi dai nei yi ban duan lie ou nei ,hui cai gong zuo mian hang dao wei zhi ying bi kai lie xi fa yo ou yu ying li zeng gao ou 。(4)tong guo shu zhi mo ni fen xi fang fa ,que ding le 4#mei kai cai hou ,3#mei ceng nei de ying li ji zhong ou yu 。zai gong zuo mian qing xie fang xiang shang ,ying li ji zhong ou yu wei cai kong ou mei bi bang ce 6.5~25.3m、cai kong ou nei 9.1~46.9m,yu 4#mei ceng gong zuo mian fen bie wei wai cuo he nei cuo guan ji 。zai gong zuo mian tui jin fang xiang shang ,ying li ji zhong feng zhi dian wei yu 4#mei ceng kai qie yan hou fang 10mchu ,er zai 4#mei ceng kai qie yan wei zhi qian fang ju li da yu 6mfan wei nei ,mei ceng nei ying li jun di yu yuan yan ying li 。(5)dui shang zu 3#mei shou cai 4207gong zuo mian hang dao bu zhi fang an yu zhi hu fang an jin hang le she ji ,4207gong zuo mian hui feng hang cai yong wai cuo bu zhi fang shi ,wai cuo ju li wei 2m;yun shu hang dao cai yong nei cuo bu zhi fang shi ,nei cuo ju li wei 3m,4207gong zuo mian kai qie yan bu zhi zai xia zu mei gong zuo mian kai qie yan chao qian 6mwei zhi chu 。hang dao cai yong mao gan +mao suo +jin shu wang lian ge zhi hu fang shi 。(6)zai fang an que ding hou dui hang dao jue jin zhi 150mnei de wei yan bian xing liang jin hang le jian ce ,que ding hang dao jue jin ying xiang fan wei yao wei 30m,wei yan bian xing liang zheng ti jiao xiao ,wei yan kong zhi qing kuang jiao hao 。jie zhi dao 2018nian 12yue ,yong ning mei kuang 3#mei ceng yi cheng gong hui cai 4ge gong zuo mian ,bing ju hui cai guo cheng zhong wei chu xian ming xian de kuang ya xian xian qing kuang ,jing ji xiao yi ju you ming xian de di sheng ,biao ming ben wen yan jiu jie guo ju you jiao hao de ying yong xiao guo 。
论文参考文献
论文详细介绍
论文作者分别是来自太原理工大学的申浩，发表于刊物太原理工大学2019-07-26论文，是一篇关于近距离煤层论文,上行开采论文,层间岩层结构论文,巷道布置方案论文,围岩变形论文,太原理工大学2019-07-26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，资料来自太原理工大学2019-07-26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：近距离煤层论文; 上行开采论文; 层间岩层结构论文; 巷道布置方案论文; 围岩变形论文; 太原理工大学2019-07-26论文;