Study of Advance Detection of Coal Seam Thickness based on Integrate Geophysical Prospecting Techniques
Study of Advance Detection of Coal Seam Thickness based on Integrate Geophysical Prospecting Techniques
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发表时间：
2013
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通讯作者：
Du Yimi
中科院分区：
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作者：
Du Yimi
新义煤矿煤层厚度变化大，对煤与瓦斯突出具有重要的控制作用，为探测掘进巷道前方煤层厚度变化，采用网络并行电法对12011胶带运输巷道煤层厚度变化进行了超前探测，通过对三种物探方法探测结果的分析，认为在矿区前方20 ~ 30 m处存在一个相对低阻带，在矿区内存在一个相对低阻带，在矿区内存在一个相对低阻带。在煤巷前方65 ~ 75 m处存在一个相对高阻带，地震表现为强反射相组，在此范围内，煤层厚度大幅度减小;煤层厚度在30 ~ 60 m范围内局部变化，工程实践证明，煤层产状与探测结果一致，为瓦斯防治和巷道工程布置提供了重要参考。
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.