An Applied Study of Comprehensive Geophysical Methods in Exploration of Multilayer Goaf in Coal Mines in Zhangqiu
In order to take full advantage of geophysical prospecting in the detection of goaf in coal mines,accurately detect the distribution of goaf in coal mines,and better serve the urban construction and ecological environment protection,it is very important to choose appropriate geophysical exploration method.Zhangqiu Coal Mine in Shandong Province has complex goaf distribution,developed fault structure and multi-layer coal mining.This paper starts with the analysis of geological data,summarizes the distribution characteristics of coal seam and form of goaf.High-density electrical method and EH-4 conductivity imaging methodare selected.It gives full play to the advantages in shallow detection,selects appropriate parameters,improves the detection accuracy,and clarifies the principle of interpretation,deduces the distribution range and burial depth of 3 coal,4 coal,7 coal,9 coal and 10 coal goafs,and speculates the distribution locations of the main fault structures.The validity of the method combination are proved by the date of late drilling and downhole TV,and the detection of 30～400 m's goaf abnormal has been basically realized.The high-density electrical method and EH-4 have complementary advantages,which provides a guidance for detecting other goafs in similar conditions.
multilayer goaf in coal minesdistribution law of coal seamEH-4 conductivity imaging methodhigh-density electrical method
万方数据
维普
