摘要
随着浅部煤炭资源开采进入尾声,深部煤层的勘探与开发成为下一步的发展趋势.为了探索瞬变电磁在煤炭领域的发展突破方向,本文从理论、方法、技术、装备及应用等方面对瞬变电磁法用于煤田探测的研究成果进行了分析总结.首先介绍近年来瞬变电磁法在地面和井下的最新进展,包括时变点电荷载流微元理论、瞬变电磁全空间理论、修正式中心回线法、电性源短偏移深部探测法、小回线大电流法、矿井强干扰处理技术、地形影响校正技术、联合时-频处理技术、以及在井下和有低阻覆盖时观测数据的处理技术等.然后,结合实际情况,说明瞬变电磁法在煤炭领域的应用效果.最后,展望了瞬变电磁法在煤田领域的研究方向,包括进一步完善电性源近场探测理论和全空间物理场基础理论,开发精细数据处理的方法及地面-井下联合分析方法等.
Large-depth exploration of coal mine is the main trend for the exhausted shallow resources. In order to seek for the development direction of the transient electromagnetic field in the coal mine, this paper summarized the research of transient electromagnetic method（ TEM） on the coal-field from theory,method,technology,equipment and application. Firstly,the latest developments of TEM on the ground and downhole includes timedomain point-charge infinitesimal, whole-space theory, modified central-loop TEM, short-offset grounded-wire TEM, small-loop TEM with large current,data processing with strong interference,terrain correction,time-frequency analysis method,downhole and low-resistivity covered data processing. Then,the effect of these new developments in the coal fields was illustrated through typical case studies. At last,the research directions of TEM in the coalfield were proposed from aspects of improving the basic theory of nearsource grounded-wire TEM and mine TEM theory in whole space,and developing fine data processing methods and conjoint analysis of on the ground and downhole.
出处
《地球物理学进展》
CSCD
北大核心
2017年第1期319-326,共8页
Progress in Geophysics
基金
国家自然科学研究基金(41474095)
中国科学院地质与地球物理研究所矿产资源重点实验室开放课题
国土资源部煤炭资源勘查与综合利用重点实验室开放课题联合资助
关键词
深部煤层
瞬变电磁
研究进展
探测
large-depth coal
TEM
research development
exploration
