综合物探方法在采空区及其富水性探测中的应用
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摘要
研究矿区为整合矿井,区内采掘情况较为复杂,为此提出并应用了地面物探与井下物探结合查明采空区及其富水性的方法。首先采用三维地震勘探查明矿区内煤层的赋存和构造的发育特征,同时圈定采空区异常分布范围,在此基础上,重点在异常区附近进行地面电法勘探(瞬变电磁法及高密度电法等)工作,验证采空并调查其采空及构造的含、导水性;进而利用井下瞬变电磁技术,重点在地面方法圈定的采空积水区附近进行井下异常的精确定位。在确保矿井生产的前提下,通过上述方法的系统应用,不但实现了对煤炭资源的精细勘查和采空区及其积水量的重点探测,同时还有效降低了井下超前钻探的工作量。
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.
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.
引文
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[2]丁荣胜,张殿成,王仕昌,等.高密度电阻率法和地震映像法在采空区勘察中的应用[J].物探与化探,2010,34(6).
[3]李耀华,杨进,李世峰.瞬变电磁与电阻率测深在沙午铁路采空区勘查中的应用[J].物探与化探,2011,35(2).
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[5]温建亮.瞬变电磁法勘探在煤层采空积水区的应用[J].中国煤炭地质,2010,22(5).
[6]孙二峰.瞬变电磁法在煤矿井下探水中的应用[R].技术与市场,2011,(5).
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