强干扰条件下电磁法在探测煤矿积水采空区的应用
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摘要
在各种强干扰条件下,采用电磁法准确探查煤矿积水采空区是一个难点。采用瞬变电磁法和高密度电阻率法2种方法巧妙地相互配合、合理化去噪,探查了陕北侏罗纪煤田某矿4~(-2)煤42101—42104工作面采空区积水范围。对2种勘探方法所取得的数据中的各种干扰采用合理探测方法,能够有效规避强干扰,利用限差、拟合与多点圆滑相结合的方法对较小的干扰进行去噪处理,结合4~(-2)煤层已知的水文、地质资料,准确解释了测区内4~(-2)煤层采空积水区分布范围。钻探结果表明,该物探结果与实际吻合。
It is a difficult point to use the electromagnetic method to accurately detect the mined-out area of coal mine water under various strong interference conditions.In this paper,the transient electromagnetic method and the high-density resistivity method were used to coordinate and rationalize the denoising,and the water accumulation area of the 42101～42104 working face of a mine of 4~(-2) coal in a Jurassic coal field in northern Shaanxi was explored.By using the reasonable detection method to effectively avoid strong interference,the various interferences in the data obtained by the two exploration methods were combined with the method of tolerance,fitting and multi-point smoothing to deal with small interference denoising.Combined with the known hydrological and geological data of the 4~(-2) coal seam,the distribution range of the mined water in the 4~(-2) coal seam in the survey area was accurately explained.The drilling results indicated that the geophysical results were consistent with the actual conditions.
It is a difficult point to use the electromagnetic method to accurately detect the mined-out area of coal mine water under various strong interference conditions.In this paper,the transient electromagnetic method and the high-density resistivity method were used to coordinate and rationalize the denoising,and the water accumulation area of the 42101～42104 working face of a mine of 4~(-2) coal in a Jurassic coal field in northern Shaanxi was explored.By using the reasonable detection method to effectively avoid strong interference,the various interferences in the data obtained by the two exploration methods were combined with the method of tolerance,fitting and multi-point smoothing to deal with small interference denoising.Combined with the known hydrological and geological data of the 4~(-2) coal seam,the distribution range of the mined water in the 4~(-2) coal seam in the survey area was accurately explained.The drilling results indicated that the geophysical results were consistent with the actual conditions.
引文
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[2] 杨虎雄,田取珍,王旭杰,等.采空区积水对下组煤开采影响分析[J].煤矿安全,2013,44(6):196-197.Yang Huxiong,Tian Quzhen,Wang Xujie,et al.Impact analysis of goaf water on the mining of lower coal group[J].Safety in Coal Mines,2013,44(6):196-197.
[3] 马雄德,范立民,贺卫中,等.浅埋煤层高强度开采突水危险性分区评价[J].中国煤炭,2015,41(10):33-36.Ma Xiongde,Fan Limin,He Weizhong,et al.Zoning and evaluation on water inrush risk in shallow coal seam with high intensity mining[J].China Coal,2015,41(10):33-36.
[4] 孟强华,窦文武.瞬变电磁探测在煤矿采空区积水边界探测中的应用[J].煤炭技术,2018,37(2):123-125.Meng Qianghua,Dou Wenwu.Application of transient electromagnetic detection in goaf water boundary detection in coal mine[J].Coal Technology,2018,37(2):123-125.
[5] 薛国强,于景邨.瞬变电磁法在煤炭领域的研究与应用新进展[J].地球物理学进展,2017,32(1):319-326.Xue Guoqiang,Yu Jingcun.New development of TEM research and application in coal mine exploration[J].Progress in Geophysics,2017,32(1):319-326.
[6] 蒋邦远.瞬变电磁法勘探[M].北京:地质出版社,1998.
[7] 牛之琏.时间域电磁法原理[M].长沙:中南大学出版社,1990.
[8] 杨镜明,魏周政,高晓伟.高密度电阻率法和瞬变电磁法在煤田采空区勘查及注浆检测中的应用[J].地球物理学进展,2014,29(1):362-369.Yang Jingming,Wei Zhouzheng,Gao Xiaowei.Application of the methods of high density resistivity method and transient electromagnetic to detecting coal mining goaf and to inspect grouting effect[J].Progress in Geophysics,2014,29(1):362-369.
[9] 范涛,安绍鹏,王秀臣,等.煤矿采空区探测中的瞬变电磁干扰压制[J].物探与化探,2012,36(6):1006-1009.Fan Tao,An Shaopeng,Wang Xiuchen,et al.Interference suppression in exploration of the mined-out area in the coal mine[J].Geophysical and Geochemical Exploration,2012,36(6):1006-1009.
[10] 武军杰,邓晓红,张杰,等.强干扰区电磁法勘探抗干扰措施及效果分析[J].物探化探计算技术,2013,35(1):40-46.Wu Junjie,Deng Xiaohong,Zhang Jie,et al.Anti-interference measures with electromagnetic method in noisy area strong level and the analysis of effect[J].Computing Techniques for Geophysical and Geochemical Exploration,2013,35(1):40-46.
[11] 刘菁华,王祝文,朱士,等.煤矿采空区及塌陷区的地球物理探查[J].煤炭学报,2005,30(6):715-719.Liu Jinghua,Wang Zhuwen,Zhu Shi,et al.Geophysical exploration about exhausted area and sinking area in coal mine[J].Journal of China Coal Society,2005,30(6):715-719.
[12] 严加永,孟贵祥,吕庆田,等.高密度电法的进展与展望[J].物探与化探,2012,36(4):576-584.Yan Jiayong,Meng Guixiang,Lü Qingtian,et al.Progress and prospect of the electrical resistivity imaging survey[J].Geophysical and Geochemical Exploration,2012,36(4):576-584.
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