摘要
新义煤矿煤层厚度变化大，煤厚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厚变化情况，采用网络并行电法、矿井瞬变电磁法及震波超前探测综合物探技术，对12011胶带运输巷煤厚变化进行超前探测。根据3种物探手段结果综合分析，胶带运输巷正头前方20—30m处显示有一相对低阻区，地震存在强反射相位组，此范围内存在岩性变化，主要表现为煤层变薄；胶带运输巷正头前方65～75m处有一相对高阻区，地震存在强反射相位组，主要表现为煤层变厚，其变化幅度较大；在正头前方30～60m内局部可能存在煤厚变化。工程实际揭露表明，煤层赋存情况与探测结果一致，为瓦斯超前治理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.
出处
《矿业安全与环保》
北大核心
2013年第5期63-66,70,共5页
Mining Safety & Environmental Protection
关键词
综合物探
煤厚变化
超前探测
瓦斯治理
integrate geophysical prospecting
variation of coal seam thickness
advance detection
gas control
