Transient electromagnetic exploration-based experiment on the relationship between the level of gas content and apparent resistivity in high rank coal seam
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摘要: 为掌握煤层瓦斯分布规律，揭示煤层瓦斯含量与视电阻率的关系，结合实验室关于煤样电阻率的研究，使用瞬变电磁法研究煤层视电阻率与瓦斯含量的相关性，在豫西新安煤矿进行18次探测试验，获取有效数据21组。研究表明：煤层视电阻率与瓦斯含量呈较好的负相关，瓦斯含量每升高1 m3/t，视电阻率对数值降低6.6%~20%，判定系数为0.621 9~0.753 1，说明煤层视电阻率对瓦斯含量具有明显的响应特征，利用瞬变电磁可以在相似地质条件下探测煤层瓦斯含量高低及其分布规律。Abstract: In order to master the distribution law of the coal seam gas and reveal the relationship between gas content and apparent resistivity, the experiment combined the laboratory research on coal sample and resistivity and used transient electromagnetic method to study the correlation between apparent resistivity and gas content of coal seam, it has been detected for 18 times and 21 sets of the effective data were obtained. The research shows that there is a negative correlation between apparent resistivity and gas content of coal seam, when the gas content increased by 1 m3/t, the apparent resistivity decreased by 6.6% to 20%, the determination coefficient was between 0.621 9 and 0.753 1 at the same time, it shows that the apparent resistivity of coal seams has a high degree of explanation to the coal seam gas content, the method can be used to detect the content and the distribution of coal seam gas with the similar geological condition.
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Keywords:
- gas content /
- apparent resistivity /
- transient electromagnetic /
- detection /
- relevance
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