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| Application of comprehensive geophysical exploration method in fracture exploration of burnt rock |
| Zhao Hui, Zhou Xuguang, Wang Hui |
| Shaanxi Coal Geophysical Surveying and Mapping Co., Ltd., Xi 'an 710000，China |
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Abstract In order to explore the fracture development of shallow burnt rock in Yanghuopan Mine in northern Shaanxi, high precision magnetic method and high density electrical method were used. Based on the previous interpretation methods for determining the spontaneous combustion boundary of coal seam, combined with field geological survey, the relative low magnetic and magnetic reversal in high magnetic anomaly and the electrical high resistance characteristics of burnt rock were used to explain and infer the range of burnt rock fracture development area. Through drilling verification, the interpretation results were basically consistent with the drilling disclosure, which provided accurate basic data for the later treatment project of burnt rock area. The practice showed that the above comprehensive geophysical exploration method could effectively explore the fracture development area of burnt rock in shallow coal seam, which provided a reference for exploring the fracture development area of burnt rock in other areas.
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