Application of Parallel Electrical Method in Detecting “Three Zones” in Inclined Thick Coal Seam
LIU Jun;CCTEG Chongqing Research Institute;State Key Laboratory of The Gas Disaster Detecting,Preventing and Emergency Controlling;
In order to guide the gas disaster control of fully mechanized coal working face in inclined thick coal seam with high concentration gas in a coal mine in Xinjiang,the"vertical three zones"distribution of 1 E401 fully mechanized coal working face in the coal mine was detected by the parallel electric method. The borehole electrode current and resistivity data were inversed. This paper analyzed and explained the data of parallel electrical method. The results showed that the height of collapse zone in 1 E401 working face is 13.0 m,the height of fracture zone is 44.0 m,the height of the bending zone is more than 44.0 m,the ratio of caving height and thickness is 3. 25,the ratio of fracture zone height and thickness is 11. The measured values are basically consistent with the theoretical values. The mining influence stress exceeding the maximum distance is 60.0 m.
【CateGory Index】： TD712