目前采用的直流电法,劳动强度大,分辨能力不高、难于穿透高阻屏蔽层。为了迅速扭转北煤南运,给江南隐伏煤田勘探提供新的物探手段,我们遵照毛主席“我们一定要有无产阶级的雄心壮志,敢于走前人没有走过的道路,敢于攀登前人没有攀登过的高峰”的教导,自力更生、艰苦奋斗,在很多基层物测单位的大力支持与协助下,反复实践,打破苏修社会帝国主义对我们的层层封锁,利用我国第一台频率电磁测深仪,对这种方法进行了研究。 Currently used DC method, labor-intensive, resolution is not high, it is difficult to penetrate the high-impedance shield. In order to quickly reverse the northward transport of northern coal and provide new geophysical means of exploration for concealed coalfields in southern China, we follow Chairman Mao’s principle that “we must have the ambition of the proletariat, dare to go the path our predecessors did not go through and dare to climb. Over the peak ”of education, self-reliance and arduous struggle, with the great support and assistance of many grass-roots material testing units, practice repeatedly and break the layers of blockade imposed on us by the Soviet revisionist social-imperialists and make use of China’s first frequency electromagnetic sounding Instrument, this method has been studied.