文章摘要
李忠平.地面-坑道激电测深方法在山东玲珑断裂带深部找矿中的应用[J].地质与勘探,2020,56(4):783-791
地面-坑道激电测深方法在山东玲珑断裂带深部找矿中的应用
Study and application of ground to tunnel IP sounding method to searching for deep ore bodies in the Linglong fault zone of Shandong Province
  修订日期:2020-05-04
DOI:10.12134/j.dzykt.2020.04.011
中文关键词: 地-坑激电 地-坑中梯测深 地-坑中梯装置系数 二维电法剖面反演 深部矿体 玲珑断裂带 山东
英文关键词: ground-tunnel IP, ground-tunnel intermediate gradient sounding, ground-tunnel intermediate gradient device coefficient, two-dimensional electric method profile inversion, deep orebody, Linglong fault zone, Shandong Province
基金项目:全国危机矿山接替资源勘查项目(编号:200537015)资助
作者单位E-mail
李忠平 中国冶金地质总局山东正元地质勘查院山东济南 正元地理信息集团股份有限公司北京 xjywt@163.com 
摘要点击次数: 1611
全文下载次数: 641
中文摘要:
      在山东玲珑断裂带深部找矿中,考虑断裂带处在地电干扰和地形变化复杂地段,且深部地质体产状变化较大,仅依据半空间地面物探方法很难摸清地质体的展布形态,盲目布设钻孔会造成找矿成本的提高。为精确反演深部矿体的边界范围、走向及倾向,提高钻孔见矿率,降低找矿成本,在山东玲珑断裂带地面、坑道采用立体物探技术,试验通过布设多条方位不同的地-坑、坑-坑和地-地纵横激电中梯剖面和双向三极测深剖面,进行了二维电法剖面反演。在地面-坑道激电测深方法中,地面-坑道供电,坑道测量探测深度与坑道深度呈正相关,反映了深部巷道底板以下电阻率和极化率的分布状况,可以实现深地探测目的。由于地面-坑道供电,坑道测量装置处在半空间和全空间两个部分,需要采用“镜像法”和地下倾斜偶极源电流场特征对其装置系数k值重新推导,以反映坑道空间岩矿体真实电阻率的变化。坑道中梯剖面异常与单向三极剖面异常、双向三极电测深反演结果对应较好。经钻探验证,矿体分布与物探推断高极化体基本一致,为快速准确布设深部钻孔提供资料。
英文摘要:
      In the deep prospecting of the Linglong fault zone in Shandong, it is considered that the fault zone is in a complex section with interference and topographic changes, and the occurrence of deep geological bodies changes greatly. It is difficult to find out the distribution of geological bodies based on the half-space surface geophysical methods. Blindly arranging boreholes will increase the cost of prospecting. In order to accurately invert the boundary range, trend and tendency of deep ore bodies, improve the rate of drilling ore seeing and reduce the cost of prospecting, three-dimensional is adopted in the ground and tunnel of Linglong fault zone in Shandong. In geophysical exploration technology, the experiment carried out the inversion of the two-dimensional electrical method profile by arranging multiple ground-pit, pit-pit, and ground-ground vertical and horizontal IP intermediate sounding profiles and bidirectional three-pole sounding profiles. In the ground-tunnel induced electrical sounding method, the ground-tunnel power supply, the depth of the tunnel measurement and the depth of the tunnel are positively correlated, reflecting the distribution of the resistivity and polarizability below the floor of the deep tunnel, which can achieve the purpose of deep exploration. Due to the ground-tunnel power supply, the tunnel measuring device is located in half space and full space. It is necessary to use the "mirror method" and the characteristics of the underground tilted dipole source current field to re-derive the device coefficient K value to reflect the tunnel space rock mine. Changes in the body's true resistivity. The anomaly of the ladder profile in the tunnel corresponds well with the anomaly of the unidirectional tripolar profile and the inversion results of the bidirectional tripolar electrical sounding. It is verified by drilling that the distribution of the ore body is basically consistent with the geophysical inference of the highly polarized body, which provides data for the rapid and accurate deployment of deep boreholes.
查看全文   查看/发表评论  下载PDF阅读器
关闭