| 瞬变电磁法在探测宏石煤矿采空区中的应用 |
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| 引用本文： | 熊家勤.瞬变电磁法在探测宏石煤矿采空区中的应用[J].中国煤炭地质,2012(10):52-56. |
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| 作者姓名： | 熊家勤 |
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| 作者单位： | 湖北煤炭地质局,湖北武汉430070 |
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| 摘 要： | 山西省灵石县宏石煤矿是由四家独立的小煤矿整合而成的新型股份制煤矿,区内可采煤层为5层。由于前期的开采,遗留下大量的采空区及小窑。为查清采空区范围及其富水状况,采用瞬变电磁法对矿区实施了矿井水文地质补充勘查工作。根据现有物探资料可知,该区的视电阻率曲线类型为HA型,其中第四系底界面为低阻分界面,奥陶系石灰岩的顶界面为高阻界面。通过建立已知充水与未充水采空区的地电模型,总结出该区煤层采空充水区与导水断层裂隙带的电阻率变化规律,并以10、17、25Ω·m作为确定各煤层采空区与断层强、中、弱富水性的阈值,推断出2号、4号、6号、9号、10号各煤层采空区范围及富水性。经验证,解释结果与实际基本相符。
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| 关 键 词： | 采空区 断层 富水性 瞬变电磁法 |
Application of Transient Electromagnetic Method in Hongshi Coalmine Gob Area Prospecting |
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| Xiong Jiaqin.Application of Transient Electromagnetic Method in Hongshi Coalmine Gob Area Prospecting[J].Coal Geology of China,2012(10):52-56. |
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| Authors: | Xiong Jiaqin |
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| Institution: | Xiong Jiaqin (Hubei Bureau of Coal Geological Exploration, Wuhan, Hubei 430070) |
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| Abstract: | Abstract： The Hongshi coalmine in the Lingshi County, Shanxi Province is a new typed stock-holding system coalmine integrated from 4 independent small coalmines. The area has 5 mineable coal seams, since previous period mining, left behind a mass of gob areas and small mines. To investigate gob area extent and water yield property, the transient electromagnetic method is used to carry out coalmine supplementary hydrogeological exploration. According to existing geophysical prospecting data can see, the apparent resistivity traces are HA typed, in which, the Quaternary bottom is a low-resistivity interface; Ordovician limestone top is a highresistivity interface. Through geoeleetric modeling of known water-filled and not water-filled gob areas, summed up resistivity variation pattern of water-filled coal seam gob area and water conducted zone in the area, taking 100-m,171Ω·m,250·m as thresholds for their strong, medium and weak water yield properties, and presumed Nos.2, 4, 6 and 9 coal seams gob area extents and water yield properties. The interpreted results are basically identical with practices after verification. |
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| Keywords: | gob area fault water yield property transient electromagnetic method |
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