It determines the calculation parameters in accordance with geological survey data by the traditional simplified Bishop arc movable surface method and make the calculation of stable coefficients of the typical Grade I, Grade II and Grade III side slopes.
By the 1∶10 000 geological survey,1∶10 000 magnetic,large power induction electrical mid-gradient survey, couple pole sounding, symmetrical quadrupole sounding, secondary and original halo survey, we have outlined the Douyan magnetic electric anomaly about 3km~2 with maximum 1 480nT and Ms>2%.
According to data of 1∶50 000 and 1∶200 000 regional geological survey, classify in accordance with scheme of the International Stratigraphic Commission to Ordovician Period of Guilin again, the lowest limit of upper Ordovician series and the lowest limit of traditional medium Ordovician series are about equal;
This article revealed Geological Survey Institute's characteristic of service to Japanese Imperialist for plundering economy and natural resources by making a survey and analysis of evolution history, regulation system and chief research and analytical activities of Colonial Scientific Research Institutes, which used to be Geological Survey Institute, during the period of Japanese infringed China.
Zhou Zanheng(Chow Tanheng or T.C.Chow,Jan.14,1893-Jan.2,1967)was graduated from the institute of Geology under the Ministry of Agriculture and Commerce in 1916,and after his graduation worked for the institute of Geological Survey in the same year.