本文主要研究内容
作者朱鹏瑞（2019）在《倾斜厚大矿体崩落法开采顶板围岩冒落机理与演化规律研究》一文中研究指出：崩落法开采过程中往往引起上覆岩层的冒落从而形成隐伏采空区。崩落法采空区具有隐蔽性强、形态复杂、顶板不稳定等特点,其顶板围岩的冒落直接关系着上覆岩层及地表的移动规律。因此开展崩落法开采顶板围岩冒落机理与演化规律研究,具有重要的理论意义和工程价值。本文以夏甸金矿为工程背景,以揭示倾斜厚大矿体崩落法开采顶板冒落机理和演化规律为目标,综合采用室内力学实验、理论分析、数值模拟及现场探测等技术手段,围绕节理岩体等效参数确定、倾斜采空区顶板冒落机理与演化规律、高埋深隐伏采空区综合探测与验证等内容展开深入理论研究。(1)在现场工程地质调查及节理ShapeMetrix3D非接触扫描的基础上建立了夏甸金矿矿体纵剖面优势节理信息概化图,采用室内试验、数值模拟及理论分析的手段对夏甸金矿节理岩体力学参数及可崩性进行了研究。结果表明,夏甸金矿矿岩属于典型的硬脆性岩石,可崩性较好,崩落法采空区在一定时间内能够得到较好地冒落,其REV尺寸为高度25m,直径12.5m。(2)通过建立倾斜矿体随机节理模型,对倾斜厚大矿体崩落法开采顶板围岩冒落机理及影响因素进行了研究。结果表明,倾斜矿体崩落法开采时采空区顶板围岩具有“应力-冒落”双拱特征;冒落拱沿走向基本呈对称拱形,沿倾向呈非对称拱形特征,在倾向中上部较高,在倾向下部较低;冒落最大位移与矿体厚度呈二次多项式关系;矿体倾角越缓,顶板冒落范围越大,但最大冒落位移越小;节理组倾角为30°/60°时,围岩水平位移的偏移更大,对地表塌陷的影响最小,但影响范围最广;水平构造应力越大,围岩水平位移越大;上盘断层的存在,会影响顶板冒落的扩展路径,但使顶板的冒落会更加充分。(3)基于现场节理分布与参数建立夏甸金矿崩落法矿体的数值模型,通过模拟隐伏采空区冒落带最高点在-231.7m水平。构建隐伏采空区开采的物理相似模型,对顶板冒落过程进行了重演与验证,得到冒落带最高点为-246m。基于时滞非线性MGM(1,m|τ,γ)模型预测冒落带发展最高点为-236m水平。因此综合多种计算与试验模式,空区冒落至散体充满时最高点约为-230m～-250m左右,距离地表约350m～370m左右。(4)在理论研究的基础,结合夏甸金矿实际条件,提出了500m以深隐伏采空区综合探测验证方法,通过高密度电法与地表钻探技术探测未发现大规模空区,结合钻孔摄像长期监测与空区边界的探地雷达测试结果,证明隐伏采空区基本已被冒落散体密实充满,验证了数值模拟与理论计算的准确性。
Abstract
beng la fa kai cai guo cheng zhong wang wang yin qi shang fu yan ceng de mao la cong er xing cheng yin fu cai kong ou 。beng la fa cai kong ou ju you yin bi xing jiang 、xing tai fu za 、ding ban bu wen ding deng te dian ,ji ding ban wei yan de mao la zhi jie guan ji zhao shang fu yan ceng ji de biao de yi dong gui lv 。yin ci kai zhan beng la fa kai cai ding ban wei yan mao la ji li yu yan hua gui lv yan jiu ,ju you chong yao de li lun yi yi he gong cheng jia zhi 。ben wen yi xia dian jin kuang wei gong cheng bei jing ,yi jie shi qing xie hou da kuang ti beng la fa kai cai ding ban mao la ji li he yan hua gui lv wei mu biao ,zeng ge cai yong shi nei li xue shi yan 、li lun fen xi 、shu zhi mo ni ji xian chang tan ce deng ji shu shou duan ,wei rao jie li yan ti deng xiao can shu que ding 、qing xie cai kong ou ding ban mao la ji li yu yan hua gui lv 、gao mai shen yin fu cai kong ou zeng ge tan ce yu yan zheng deng nei rong zhan kai shen ru li lun yan jiu 。(1)zai xian chang gong cheng de zhi diao cha ji jie li ShapeMetrix3Dfei jie chu sao miao de ji chu shang jian li le xia dian jin kuang kuang ti zong pou mian you shi jie li xin xi gai hua tu ,cai yong shi nei shi yan 、shu zhi mo ni ji li lun fen xi de shou duan dui xia dian jin kuang jie li yan ti li xue can shu ji ke beng xing jin hang le yan jiu 。jie guo biao ming ,xia dian jin kuang kuang yan shu yu dian xing de ying cui xing yan dan ,ke beng xing jiao hao ,beng la fa cai kong ou zai yi ding shi jian nei neng gou de dao jiao hao de mao la ,ji REVche cun wei gao du 25m,zhi jing 12.5m。(2)tong guo jian li qing xie kuang ti sui ji jie li mo xing ,dui qing xie hou da kuang ti beng la fa kai cai ding ban wei yan mao la ji li ji ying xiang yin su jin hang le yan jiu 。jie guo biao ming ,qing xie kuang ti beng la fa kai cai shi cai kong ou ding ban wei yan ju you “ying li -mao la ”shuang gong te zheng ;mao la gong yan zou xiang ji ben cheng dui chen gong xing ,yan qing xiang cheng fei dui chen gong xing te zheng ,zai qing xiang zhong shang bu jiao gao ,zai qing xiang xia bu jiao di ;mao la zui da wei yi yu kuang ti hou du cheng er ci duo xiang shi guan ji ;kuang ti qing jiao yue huan ,ding ban mao la fan wei yue da ,dan zui da mao la wei yi yue xiao ;jie li zu qing jiao wei 30°/60°shi ,wei yan shui ping wei yi de pian yi geng da ,dui de biao ta xian de ying xiang zui xiao ,dan ying xiang fan wei zui an ;shui ping gou zao ying li yue da ,wei yan shui ping wei yi yue da ;shang pan duan ceng de cun zai ,hui ying xiang ding ban mao la de kuo zhan lu jing ,dan shi ding ban de mao la hui geng jia chong fen 。(3)ji yu xian chang jie li fen bu yu can shu jian li xia dian jin kuang beng la fa kuang ti de shu zhi mo xing ,tong guo mo ni yin fu cai kong ou mao la dai zui gao dian zai -231.7mshui ping 。gou jian yin fu cai kong ou kai cai de wu li xiang shi mo xing ,dui ding ban mao la guo cheng jin hang le chong yan yu yan zheng ,de dao mao la dai zui gao dian wei -246m。ji yu shi zhi fei xian xing MGM(1,m|τ,γ)mo xing yu ce mao la dai fa zhan zui gao dian wei -236mshui ping 。yin ci zeng ge duo chong ji suan yu shi yan mo shi ,kong ou mao la zhi san ti chong man shi zui gao dian yao wei -230m～-250mzuo you ,ju li de biao yao 350m～370mzuo you 。(4)zai li lun yan jiu de ji chu ,jie ge xia dian jin kuang shi ji tiao jian ,di chu le 500myi shen yin fu cai kong ou zeng ge tan ce yan zheng fang fa ,tong guo gao mi du dian fa yu de biao zuan tan ji shu tan ce wei fa xian da gui mo kong ou ,jie ge zuan kong she xiang chang ji jian ce yu kong ou bian jie de tan de lei da ce shi jie guo ,zheng ming yin fu cai kong ou ji ben yi bei mao la san ti mi shi chong man ,yan zheng le shu zhi mo ni yu li lun ji suan de zhun que xing 。
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论文作者分别是来自北京科技大学的朱鹏瑞，发表于刊物北京科技大学2019-06-27论文，是一篇关于倾斜厚大矿体论文,顶板围岩论文,冒落机理论文,演化规律论文,灰色模型论文,北京科技大学2019-06-27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，资料来自北京科技大学2019-06-27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：倾斜厚大矿体论文; 顶板围岩论文; 冒落机理论文; 演化规律论文; 灰色模型论文; 北京科技大学2019-06-27论文;