瞬变电磁法在帷幕注浆效果检测中的应用
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摘要
帷幕注浆堵水工程的漏水隐患区及注浆效果评价一直是煤矿水害防治中的热点问题,受工区复杂地质环境所限,常规物探方法如直流电法、二维地震勘探、高密度法等难以获得理想的效果,而大定源瞬变电磁法由于勘探深度大、对低阻异常反映灵敏等优势逐步成为煤矿帷幕注浆应用效果检测的主要手段。采用该方法对丰纪果园煤矿帷幕注浆效果进行检测勘察,利用已有地质和钻孔资料获取的校正系数对转换数据中深度进行区域拟合校正,并采用瞬变电磁法一维反演方法对上述数据进行反演,反演结果能够圈定帷幕注浆堵水墙中过水通道的空间位置和影响范围,其正确性得到后期钻孔资料验证。表明大定源瞬变电磁法能够适用于煤矿地区的复杂地质环境,并在帷幕注浆效果检测中起到重要作用,一定程度上为煤矿水害防治中电磁勘探提供了参考与借鉴。
The evaluation of grounting effect of curtain grouting engineering is a hot issue in the prevention and control of cool mine water disasters. Due to the complex geological environment in the industrial area,conventional geophysical prospecting methods such as direct current method,2 D seismic exploration and high-density method are difficult to obtain the ideal effect,while the advantages of large fixed loop transient electromagnetic method,such as high exploration depth and sensitivity to low resistivity,have gradually become the main means to detect the application effect of coal curtain grouting. This method is used to detect the curtain grouting effect in the Fengjiguoyuan coal mine,and the correction coefficient obtained by the existing geological and borehole data is used to calibrate the depth in the conversion data. Then a one-dimensional inversion method of transient electromagnetic method is used to perform inversion of the above data. The inversion results can be used to determine the spatial position and influence range of the water passage in the curtain grouting wall,and the correctness is verified by the later drilling data. It indicated that that large fixed source transient electromagnetic method can be apply to complex geological environment in the coal mine area,and plays an important role in the performance test of the curtain grouting in the curtain,which provide reference and reference to the electromagnetic exploration in the prevention and control of coal mine water pollution.
The evaluation of grounting effect of curtain grouting engineering is a hot issue in the prevention and control of cool mine water disasters. Due to the complex geological environment in the industrial area,conventional geophysical prospecting methods such as direct current method,2 D seismic exploration and high-density method are difficult to obtain the ideal effect,while the advantages of large fixed loop transient electromagnetic method,such as high exploration depth and sensitivity to low resistivity,have gradually become the main means to detect the application effect of coal curtain grouting. This method is used to detect the curtain grouting effect in the Fengjiguoyuan coal mine,and the correction coefficient obtained by the existing geological and borehole data is used to calibrate the depth in the conversion data. Then a one-dimensional inversion method of transient electromagnetic method is used to perform inversion of the above data. The inversion results can be used to determine the spatial position and influence range of the water passage in the curtain grouting wall,and the correctness is verified by the later drilling data. It indicated that that large fixed source transient electromagnetic method can be apply to complex geological environment in the coal mine area,and plays an important role in the performance test of the curtain grouting in the curtain,which provide reference and reference to the electromagnetic exploration in the prevention and control of coal mine water pollution.
引文
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杨镜明,魏周正,高晓伟.2014.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,29(1):362-369.
季洪伟,龚育龄,王粤.2013.高密度电阻率法在某地区含水构造勘查中的应用[J].东华理工大学学报(自然科学版),36(增刊2):49-52.
江中乐,孙兵.2010.帷幕注浆技术在丰纪果园煤矿堵水工程中的应用[J].煤炭工程(11):25-31.
李建国,李金花.2012.瞬变电磁法在煤矿采空区注浆效果检测方面的应用[J].中国煤炭地质,24(4):68-71.
李貅.2002.瞬变电磁测深的理论与应用[M].西安:陕西科学技术出版社.
刘瑞新.2009.兖州煤田奥灰富水性探析[J].煤炭科学技术,37(7):112-115.
孟庆鑫,潘和平.2012.地-井瞬变电磁响应特征数值模拟分析[J].地球物理学报,55(3):1046-1053.
宋大各,胡卸文等.2013.复杂采空区注浆效果检测综合物探方法研究[J].工程勘察(5):85-89.
辛大平,梁立勋,余玉江,等.2010.龙滩煤矿采煤工作面岩溶水防治技术[J].煤炭科学技术,38(3):109-112.
薛国强,陈卫营,周楠楠,等.2013.接地源瞬变电磁短偏移深部探测技术[J].地球物理学报,56(1):255-261.
薛国强,李貅,郭文波,等.2007.大回线源瞬变电磁场响应特性[J].石油地球物理勘探,42(5):586-590.
杨海燕,邓居智,吴信民.2013.瞬变电磁法超前预报全空间解释技术研究[J].东华理工大学学报(自然科学版),36(2):199-203.
杨镜明,魏周正,高晓伟.2014.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,29(1):362-369.