本文主要研究内容
作者孟乐乐(2019)在《回线源瞬变电磁法探测分辨率研究》一文中研究指出:回线源瞬变电磁法因对低阻体敏感,现已成为煤矿水文地质调查的首选方法,用于划分含隔水层,探测赋水异常体,但是目前有关其分辨率问题仍不明确,导致前期施工设计缺乏理论依据,后期资料解释可靠性不足。针对于此,本文采用三维数值模拟的研究方法,计算了不同地电模型、不同回线边长的感应电动势响应,以5%相对异常值为分辨阈值,分析了瞬变电磁法纵、横向分辨率与回线边长的关系,主要研究成果如下:(1)对于同一地电模型,在目标层地层参数保持不变的情况下,当薄层埋深较浅时,发射回线边长的大小对感应电动势响应结果有一定的影响,但当薄层埋深较深时或为高阻薄层时,感应电动势对目标层的敏感性与发射回线边长的大小基本无关,表明纵向分辨率此时也与发射回线边长无关。(2)当发射回线边长固定时,纵向分辨率主要与目标层的地层参数有关。如对于边长为100m的发射回线,其纵向分辨率满足关系式:min 0 1(z/h)(28)16.10590809?(?/?)-16.74251672。其中对于埋深为100m,与围岩的电性差异为1:2的低阻薄层,当薄层厚度大于6.44m时即可分辨;对于埋深为100m,与围岩的电性差异为1:4的低阻薄层,当薄层厚度大于2.1m时即可分辨。(3)对三维异常体的横向分辨率不仅与发射回线边长有关,还与含异常体的模型地层参数有关。当发射回线边长固定为200m,埋深固定为100m时,其横向分辨率满足关系式:0.04520 1 min(/)623.4732L??e-(28)?。其中,对于与围岩电性差异比为1:5的低阻异常体,当异常体大小大于107m×107m×107m时即可分辨;对于与围岩电性差异比为1:10的低阻异常体,当异常体大小大于91m×91m×91m时即可分辨;对于与围岩电性差异比为1:50的低阻异常体,当异常体大小大于56m×56m×56m时即可分辨。(4)对于大小为50m×50m×50m的两个不同间隔同一深度上的双异常体,其极限分辨率为埋深80m,其间隔为60m;对于纵向大小相同,电阻率相同的双异常体,异常分辨结果为一个整体。(5)通过对比不同地层参数的薄层的电磁响应特征,提出可以代表薄层的埋深的8个属性参数作为自变量,计算了不同薄层参数下的样本库,共计3253个样本模型,利用统计学软件SPSS软件,采用逐步多元线性回归方法,建立了薄层埋深的逐步回归方程,并对方程进行了精度检验,检验模型的埋深相对误差均分布在模型埋深相对误差精度范围之内。
Abstract
hui xian yuan shun bian dian ci fa yin dui di zu ti min gan ,xian yi cheng wei mei kuang shui wen de zhi diao cha de shou shua fang fa ,yong yu hua fen han ge shui ceng ,tan ce fu shui yi chang ti ,dan shi mu qian you guan ji fen bian lv wen ti reng bu ming que ,dao zhi qian ji shi gong she ji que fa li lun yi ju ,hou ji zi liao jie shi ke kao xing bu zu 。zhen dui yu ci ,ben wen cai yong san wei shu zhi mo ni de yan jiu fang fa ,ji suan le bu tong de dian mo xing 、bu tong hui xian bian chang de gan ying dian dong shi xiang ying ,yi 5%xiang dui yi chang zhi wei fen bian yu zhi ,fen xi le shun bian dian ci fa zong 、heng xiang fen bian lv yu hui xian bian chang de guan ji ,zhu yao yan jiu cheng guo ru xia :(1)dui yu tong yi de dian mo xing ,zai mu biao ceng de ceng can shu bao chi bu bian de qing kuang xia ,dang bao ceng mai shen jiao jian shi ,fa she hui xian bian chang de da xiao dui gan ying dian dong shi xiang ying jie guo you yi ding de ying xiang ,dan dang bao ceng mai shen jiao shen shi huo wei gao zu bao ceng shi ,gan ying dian dong shi dui mu biao ceng de min gan xing yu fa she hui xian bian chang de da xiao ji ben mo guan ,biao ming zong xiang fen bian lv ci shi ye yu fa she hui xian bian chang mo guan 。(2)dang fa she hui xian bian chang gu ding shi ,zong xiang fen bian lv zhu yao yu mu biao ceng de de ceng can shu you guan 。ru dui yu bian chang wei 100mde fa she hui xian ,ji zong xiang fen bian lv man zu guan ji shi :min 0 1(z/h)(28)16.10590809?(?/?)-16.74251672。ji zhong dui yu mai shen wei 100m,yu wei yan de dian xing cha yi wei 1:2de di zu bao ceng ,dang bao ceng hou du da yu 6.44mshi ji ke fen bian ;dui yu mai shen wei 100m,yu wei yan de dian xing cha yi wei 1:4de di zu bao ceng ,dang bao ceng hou du da yu 2.1mshi ji ke fen bian 。(3)dui san wei yi chang ti de heng xiang fen bian lv bu jin yu fa she hui xian bian chang you guan ,hai yu han yi chang ti de mo xing de ceng can shu you guan 。dang fa she hui xian bian chang gu ding wei 200m,mai shen gu ding wei 100mshi ,ji heng xiang fen bian lv man zu guan ji shi :0.04520 1 min(/)623.4732L??e-(28)?。ji zhong ,dui yu yu wei yan dian xing cha yi bi wei 1:5de di zu yi chang ti ,dang yi chang ti da xiao da yu 107m×107m×107mshi ji ke fen bian ;dui yu yu wei yan dian xing cha yi bi wei 1:10de di zu yi chang ti ,dang yi chang ti da xiao da yu 91m×91m×91mshi ji ke fen bian ;dui yu yu wei yan dian xing cha yi bi wei 1:50de di zu yi chang ti ,dang yi chang ti da xiao da yu 56m×56m×56mshi ji ke fen bian 。(4)dui yu da xiao wei 50m×50m×50mde liang ge bu tong jian ge tong yi shen du shang de shuang yi chang ti ,ji ji xian fen bian lv wei mai shen 80m,ji jian ge wei 60m;dui yu zong xiang da xiao xiang tong ,dian zu lv xiang tong de shuang yi chang ti ,yi chang fen bian jie guo wei yi ge zheng ti 。(5)tong guo dui bi bu tong de ceng can shu de bao ceng de dian ci xiang ying te zheng ,di chu ke yi dai biao bao ceng de mai shen de 8ge shu xing can shu zuo wei zi bian liang ,ji suan le bu tong bao ceng can shu xia de yang ben ku ,gong ji 3253ge yang ben mo xing ,li yong tong ji xue ruan jian SPSSruan jian ,cai yong zhu bu duo yuan xian xing hui gui fang fa ,jian li le bao ceng mai shen de zhu bu hui gui fang cheng ,bing dui fang cheng jin hang le jing du jian yan ,jian yan mo xing de mai shen xiang dui wu cha jun fen bu zai mo xing mai shen xiang dui wu cha jing du fan wei zhi nei 。
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孟乐乐,发表于刊物中国矿业大学2019-07-18论文,是一篇关于回线源瞬变电磁法论文,发射回线边长论文,纵向分辨率论文,横向分辨率论文,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:回线源瞬变电磁法论文; 发射回线边长论文; 纵向分辨率论文; 横向分辨率论文; 中国矿业大学2019-07-18论文;