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| THE APPLICATION OF INTEGRATED GEOPHYSICAL EXPLORATION METHODS TO THE DETECTION OF GOAF AND ITS WATER LOG SITUATION |
| HAO Zhi-guo1, JIA Shu-lin2, WEN Qun-lin1 |
1. Shanxi Shandi Geophy-Tech. Co., Ltd., Jinzhong 030600, China;
2. Shanxi Changzhi Wangzhuang Coal Liability Ltd., Co., Changzhi 046000, China |
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Abstract The study ore district is an integrated mine, whose excavation situation is rather complex. The authors thus put forward the systematic methods which combine surface geophysical exploration with downhole geophysical exploration so as to detect the goaf and its water log situation. First, three-dimensional seismic exploration is employed to detect the development of coal seam and structures in the ore district, accompanied by the delineation of anomaly distribution in the goaf. On such a basis, surface electric methods such as transient electromagnetic method and high-density electric method are emphatically used near the anomaly district to verify the existence of goaf and investigate the water-bearing and transmissivity situation of the goaf and structures. Then, downhole transient electromagnetic method is utilized to accurately locate the downhole anomaly near the goaf waterlogged area delineated by surface methods. The systematic application of the above-mentioned methods not only guarantees the high-efficiency production of the mine but also realizes the precise exploration of coal resources and emphatic detection of the goaf and its water quantity as well as effective reduction of downhole advanced drilling workload. Therefore, it has fairly reasonable technical and economic properties and is suitable for widespread application in the mine whose underground excavation situation is relatively complex.
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Received: 10 October 2012
Published: 10 November 2012
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