Study of Advance Detection of Coal Seam Thickness based on Integrate Geophysical Prospecting Techniques
DU Yimin
ZHANG Chunguang
Abstract：The coal seam thickness changes greatly in Xinyi Mine, which has important control effect on coal and gas outburst. For detecting the thickness variation of coal seams in front of the excavation roadway,advance detection was carried out on the thickness variation of coal seams in 12011 belt-haulage gateway by using the network concurrency electrical method,the mine transient electromagnetic method and seismic method. The analysis of the detection results obtained with these three geophysical prospecting techniques indicated that there was a relatively low resistivity zone about 20m to 30m away in front of the belt gateway, the earthquake showed a strong reflection phase group, and in this range, the thickness of coal seams greatly decreased;there was a relatively high resistivity zone about 65m to 75m away in front of the belt gateway,the earthquake showed a strong reflection phase group,the thickness of coal seams greatly increased;the thickness of coal seams may locally change in 30m to 60m range. Engineering practice proved that the occurrence of coal seams was consistent with the detection results, which provided an important reference for the gas prevention and control and the layout of roadway projects.
Keywords：integrate geophysical prospectingvariation of coal seam thicknessadvance detectiongas control
Publication Date：2013-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 63-66,70 )