本文主要研究内容
作者倪惠宁（2019）在《冲刷带侵蚀煤层综放开采采动应力-裂隙演化特征研究》一文中研究指出：保德煤矿三盘区受大范围冲刷带侵蚀,冲刷带作为一种工作面回采过程中较为常见的地质异常体,严重影响工作面的安全回采。一方面冲刷带对煤层的侵蚀使可采资源量减少,同时冲刷带岩性为硬度较大的砂岩或砾岩,割冲刷带时易损坏采煤设备;另一方面冲刷带侵蚀区域顶板岩性变化大,不利于巷道支护,易导致顶板事故的发生。为掌握冲刷带侵蚀煤层回采过程中矿压显现特征,本文以神东保德煤矿81308工作面为研究背景,基于矿井和工作面地质赋存条件及开采参数,综合运用理论计算、相似模拟、数值模拟手段,对冲刷带侵蚀煤层综放开采采动应力-裂隙演化特征进行研究。首先,通过现场调研获得保德矿三盘区冲刷带侵蚀特点、81308工作面开采参数及煤岩体力学参数,为理论分析、相似模拟和数值模拟试验提供数据支撑。其次,建立冲刷带影响下采场矿压力学模型,对冲刷带侵蚀下工作面裂隙带发育、顶板破断及支架载荷特点进行理论分析发现:冲刷带侵蚀煤层后采高降低、直接顶厚度增加,采场两带发育高度降低;冲刷段顶板破断后形成砌体梁结构,非冲刷段顶板破断后在煤壁后方形成短悬臂梁结构;为保证覆岩结构的稳定性,冲刷段需提供9437~10558kN支撑力,非冲刷段需提供10859~12108kN支撑力。再次,建立相似模拟模型及FLAC、UDEC数值模拟模型,探究冲刷带侵蚀对覆岩破断运移、裂隙发育及应力分布特征的影响。研究发现:(1)冲刷段煤层受冲刷带侵蚀影响采高降低,同时直接顶较厚、垮落矸石充填程度高,基本顶岩层断裂后,破断岩块能形成稳定的砌体梁结构;非冲刷段回采时,采高较大,直接顶板垮落后离层空间大,基本顶出现整体滑落失稳,煤壁后方形成短悬臂梁结构,基本顶破断后工作面来压剧烈。(2)冲刷段回采时,采场应力呈对称拱形分布;回采至非冲刷段时,采场应力呈非对称拱形分布,冲刷段拱高低于非冲刷段。冲刷段煤层垂直应力峰值位置同煤壁距离要小于非冲刷段。(3)由于冲刷带侵蚀对工作面采高的影响,冲刷段裂隙带发育高度低于非冲刷段。最后,基于上述研究结果,结合81308工作面冲刷带侵蚀特点,综合分析冲刷带对工作面回采的影响,并针对性地提出过冲刷带的措施。研究结果对冲刷带侵蚀煤层开采及围岩控制具有一定的借鉴意义。图[43]表[7]参[67]
Abstract
bao de mei kuang san pan ou shou da fan wei chong shua dai qin shi ,chong shua dai zuo wei yi chong gong zuo mian hui cai guo cheng zhong jiao wei chang jian de de zhi yi chang ti ,yan chong ying xiang gong zuo mian de an quan hui cai 。yi fang mian chong shua dai dui mei ceng de qin shi shi ke cai zi yuan liang jian shao ,tong shi chong shua dai yan xing wei ying du jiao da de sha yan huo li yan ,ge chong shua dai shi yi sun huai cai mei she bei ;ling yi fang mian chong shua dai qin shi ou yu ding ban yan xing bian hua da ,bu li yu hang dao zhi hu ,yi dao zhi ding ban shi gu de fa sheng 。wei zhang wo chong shua dai qin shi mei ceng hui cai guo cheng zhong kuang ya xian xian te zheng ,ben wen yi shen dong bao de mei kuang 81308gong zuo mian wei yan jiu bei jing ,ji yu kuang jing he gong zuo mian de zhi fu cun tiao jian ji kai cai can shu ,zeng ge yun yong li lun ji suan 、xiang shi mo ni 、shu zhi mo ni shou duan ,dui chong shua dai qin shi mei ceng zeng fang kai cai cai dong ying li -lie xi yan hua te zheng jin hang yan jiu 。shou xian ,tong guo xian chang diao yan huo de bao de kuang san pan ou chong shua dai qin shi te dian 、81308gong zuo mian kai cai can shu ji mei yan ti li xue can shu ,wei li lun fen xi 、xiang shi mo ni he shu zhi mo ni shi yan di gong shu ju zhi cheng 。ji ci ,jian li chong shua dai ying xiang xia cai chang kuang ya li xue mo xing ,dui chong shua dai qin shi xia gong zuo mian lie xi dai fa yo 、ding ban po duan ji zhi jia zai he te dian jin hang li lun fen xi fa xian :chong shua dai qin shi mei ceng hou cai gao jiang di 、zhi jie ding hou du zeng jia ,cai chang liang dai fa yo gao du jiang di ;chong shua duan ding ban po duan hou xing cheng qi ti liang jie gou ,fei chong shua duan ding ban po duan hou zai mei bi hou fang xing cheng duan xuan bei liang jie gou ;wei bao zheng fu yan jie gou de wen ding xing ,chong shua duan xu di gong 9437~10558kNzhi cheng li ,fei chong shua duan xu di gong 10859~12108kNzhi cheng li 。zai ci ,jian li xiang shi mo ni mo xing ji FLAC、UDECshu zhi mo ni mo xing ,tan jiu chong shua dai qin shi dui fu yan po duan yun yi 、lie xi fa yo ji ying li fen bu te zheng de ying xiang 。yan jiu fa xian :(1)chong shua duan mei ceng shou chong shua dai qin shi ying xiang cai gao jiang di ,tong shi zhi jie ding jiao hou 、kua la gan dan chong tian cheng du gao ,ji ben ding yan ceng duan lie hou ,po duan yan kuai neng xing cheng wen ding de qi ti liang jie gou ;fei chong shua duan hui cai shi ,cai gao jiao da ,zhi jie ding ban kua la hou li ceng kong jian da ,ji ben ding chu xian zheng ti hua la shi wen ,mei bi hou fang xing cheng duan xuan bei liang jie gou ,ji ben ding po duan hou gong zuo mian lai ya ju lie 。(2)chong shua duan hui cai shi ,cai chang ying li cheng dui chen gong xing fen bu ;hui cai zhi fei chong shua duan shi ,cai chang ying li cheng fei dui chen gong xing fen bu ,chong shua duan gong gao di yu fei chong shua duan 。chong shua duan mei ceng chui zhi ying li feng zhi wei zhi tong mei bi ju li yao xiao yu fei chong shua duan 。(3)you yu chong shua dai qin shi dui gong zuo mian cai gao de ying xiang ,chong shua duan lie xi dai fa yo gao du di yu fei chong shua duan 。zui hou ,ji yu shang shu yan jiu jie guo ,jie ge 81308gong zuo mian chong shua dai qin shi te dian ,zeng ge fen xi chong shua dai dui gong zuo mian hui cai de ying xiang ,bing zhen dui xing de di chu guo chong shua dai de cuo shi 。yan jiu jie guo dui chong shua dai qin shi mei ceng kai cai ji wei yan kong zhi ju you yi ding de jie jian yi yi 。tu [43]biao [7]can [67]
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论文详细介绍
论文作者分别是来自安徽理工大学的倪惠宁，发表于刊物安徽理工大学2019-07-08论文，是一篇关于冲刷带论文,采动应力分布论文,裂隙发育论文,支架载荷论文,安徽理工大学2019-07-08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，资料来自安徽理工大学2019-07-08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：冲刷带论文; 采动应力分布论文; 裂隙发育论文; 支架载荷论文; 安徽理工大学2019-07-08论文;