本文主要研究内容
作者闫奇（2019）在《动静组合作用下大跨度凿岩硐室稳定性分析及参数优化》一文中研究指出：某大型铜矿山,采用大直径垂直深孔阶段矿房嗣后充填法回采,矿体开采顺序为上行式开采。首采矿段的开采深度超过800m,水平方向最大主应力已经超过30MPa,属于深部高应力开采。凿岩硐室是回采过程装药作业的主要区域,长80m,跨度达到30m,作为采场的主要力学结构。深部高应力、采场大跨度和爆破强振动都是影响凿岩硐室稳定性的重要因素。而凿岩硐室结构参数的合理性是整个矿房回采成败的关键。本文通过现场勘查获取采场开采工程地质条件,利用数值模拟和现场监测等一系列研究方法对大跨度采场凿岩硐室进行了稳定性分析,计算了首采采场回采过程凿岩硐室主要力学结构的应力及位移变化规律,结合现场监测结果综合判别了动静组合载荷作用下大跨度凿岩硐室的稳定性。对比分析并优化了凿岩硐室的主要结构参数。获得以下研究成果:(1)通过现场勘查以及资料搜集的方式得到岩石力学参数,利用Hoek-Brown准则对岩石力学参数进行折减,得到折减后的岩体力学参数。为后续的数值模拟分析大跨度凿岩硐室稳定性拟提供参考。(2)对动静组合作用下首采大跨度(30m)采场凿岩硐室稳定性进行数值模拟,结果表明:开采过程中,条柱所受应力较为集中,破坏域也主要发生在支撑条柱上,顶板在失去条柱支撑后位移增加较大,随着后续凿岩硐室支撑条柱的消失,顶板位移达到最大值,但并未发生明显破坏,而凿岩硐室两侧间柱应力逐步增加,成为主要支撑结构。(3)对首采201采场大跨度(30m)凿岩硐室的顶板、间柱和支撑条柱等主要支撑结构进行现场稳定性监测,发现随着大直径深孔爆破过程,条柱应力上升非常明显,后续回采凿岩硐室条柱消失,顶板大跨度悬空,但采场顶板并未出现较大位移,间柱应力略有增加。首采仅为单一采场回采,大跨度凿岩硐室主要出现了支撑条柱开裂剥落、间柱略有片帮等现象,回采过程中采场顶板位移较小,回采结束后由于长时间未能充填,致使顶板中间局部区域出现小规模冒落,但顶板整体稳定。监测结果和数值模拟结果吻合度较好,验证了数值模拟结果的可靠性。(4)结合现场回采工艺,通过数值模拟方法,对比分析了动静组合载荷作用下三种不同结构参数多采场连续回采凿岩硐室的稳定性,结果表明,采场跨度12m(间柱宽度10m)和采场跨度18m(间柱宽度18m)两种结构参数开采过程,凿岩硐室顶板位移较小,无塑性区,两侧间柱并未明显出现应力集中,而采场跨度30m(间柱12m)开采过程凿岩硐室顶板和两侧间柱均出现不同程度破坏。考虑采场回采效率并兼顾二步骤回采,最终将凿岩硐室结构参数调整为采场跨度18m(间柱宽度18m)。
Abstract
mou da xing tong kuang shan ,cai yong da zhi jing chui zhi shen kong jie duan kuang fang si hou chong tian fa hui cai ,kuang ti kai cai shun xu wei shang hang shi kai cai 。shou cai kuang duan de kai cai shen du chao guo 800m,shui ping fang xiang zui da zhu ying li yi jing chao guo 30MPa,shu yu shen bu gao ying li kai cai 。zao yan dong shi shi hui cai guo cheng zhuang yao zuo ye de zhu yao ou yu ,chang 80m,kua du da dao 30m,zuo wei cai chang de zhu yao li xue jie gou 。shen bu gao ying li 、cai chang da kua du he bao po jiang zhen dong dou shi ying xiang zao yan dong shi wen ding xing de chong yao yin su 。er zao yan dong shi jie gou can shu de ge li xing shi zheng ge kuang fang hui cai cheng bai de guan jian 。ben wen tong guo xian chang kan cha huo qu cai chang kai cai gong cheng de zhi tiao jian ,li yong shu zhi mo ni he xian chang jian ce deng yi ji lie yan jiu fang fa dui da kua du cai chang zao yan dong shi jin hang le wen ding xing fen xi ,ji suan le shou cai cai chang hui cai guo cheng zao yan dong shi zhu yao li xue jie gou de ying li ji wei yi bian hua gui lv ,jie ge xian chang jian ce jie guo zeng ge pan bie le dong jing zu ge zai he zuo yong xia da kua du zao yan dong shi de wen ding xing 。dui bi fen xi bing you hua le zao yan dong shi de zhu yao jie gou can shu 。huo de yi xia yan jiu cheng guo :(1)tong guo xian chang kan cha yi ji zi liao sou ji de fang shi de dao yan dan li xue can shu ,li yong Hoek-Brownzhun ze dui yan dan li xue can shu jin hang she jian ,de dao she jian hou de yan ti li xue can shu 。wei hou xu de shu zhi mo ni fen xi da kua du zao yan dong shi wen ding xing ni di gong can kao 。(2)dui dong jing zu ge zuo yong xia shou cai da kua du (30m)cai chang zao yan dong shi wen ding xing jin hang shu zhi mo ni ,jie guo biao ming :kai cai guo cheng zhong ,tiao zhu suo shou ying li jiao wei ji zhong ,po huai yu ye zhu yao fa sheng zai zhi cheng tiao zhu shang ,ding ban zai shi qu tiao zhu zhi cheng hou wei yi zeng jia jiao da ,sui zhao hou xu zao yan dong shi zhi cheng tiao zhu de xiao shi ,ding ban wei yi da dao zui da zhi ,dan bing wei fa sheng ming xian po huai ,er zao yan dong shi liang ce jian zhu ying li zhu bu zeng jia ,cheng wei zhu yao zhi cheng jie gou 。(3)dui shou cai 201cai chang da kua du (30m)zao yan dong shi de ding ban 、jian zhu he zhi cheng tiao zhu deng zhu yao zhi cheng jie gou jin hang xian chang wen ding xing jian ce ,fa xian sui zhao da zhi jing shen kong bao po guo cheng ,tiao zhu ying li shang sheng fei chang ming xian ,hou xu hui cai zao yan dong shi tiao zhu xiao shi ,ding ban da kua du xuan kong ,dan cai chang ding ban bing wei chu xian jiao da wei yi ,jian zhu ying li lve you zeng jia 。shou cai jin wei chan yi cai chang hui cai ,da kua du zao yan dong shi zhu yao chu xian le zhi cheng tiao zhu kai lie bao la 、jian zhu lve you pian bang deng xian xiang ,hui cai guo cheng zhong cai chang ding ban wei yi jiao xiao ,hui cai jie shu hou you yu chang shi jian wei neng chong tian ,zhi shi ding ban zhong jian ju bu ou yu chu xian xiao gui mo mao la ,dan ding ban zheng ti wen ding 。jian ce jie guo he shu zhi mo ni jie guo wen ge du jiao hao ,yan zheng le shu zhi mo ni jie guo de ke kao xing 。(4)jie ge xian chang hui cai gong yi ,tong guo shu zhi mo ni fang fa ,dui bi fen xi le dong jing zu ge zai he zuo yong xia san chong bu tong jie gou can shu duo cai chang lian xu hui cai zao yan dong shi de wen ding xing ,jie guo biao ming ,cai chang kua du 12m(jian zhu kuan du 10m)he cai chang kua du 18m(jian zhu kuan du 18m)liang chong jie gou can shu kai cai guo cheng ,zao yan dong shi ding ban wei yi jiao xiao ,mo su xing ou ,liang ce jian zhu bing wei ming xian chu xian ying li ji zhong ,er cai chang kua du 30m(jian zhu 12m)kai cai guo cheng zao yan dong shi ding ban he liang ce jian zhu jun chu xian bu tong cheng du po huai 。kao lv cai chang hui cai xiao lv bing jian gu er bu zhou hui cai ,zui zhong jiang zao yan dong shi jie gou can shu diao zheng wei cai chang kua du 18m(jian zhu kuan du 18m)。
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论文作者分别是来自江西理工大学的闫奇，发表于刊物江西理工大学2019-09-23论文，是一篇关于大跨度论文,凿岩硐室论文,数值模拟论文,深部开采论文,爆破荷载论文,江西理工大学2019-09-23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，资料来自江西理工大学2019-09-23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：大跨度论文; 凿岩硐室论文; 数值模拟论文; 深部开采论文; 爆破荷载论文; 江西理工大学2019-09-23论文;