基于钻孔瞬变电磁法的断层富水性三维空间探测  

3D space exploration of fault water abundance based on borehole transient electromagnetic method

作　　者：陈强[1] 杨建华[1] 韦华 邢修举 Chen Qiang;Yang Jianhua;Wei Hua;Xing Xiuju(Jining No.3 Coal Mine,Yanzhou Coal Industry Co.,Ltd.,Jining 272000,China;Xi′an Research Institute,China Coal Technology and Engineering Group Corp,Xi′an 710077,China)

机构地区：[1]兖州煤业股份有限公司济宁三号井煤矿,山东济宁272000 [2]中煤科工集团西安研究院有限公司,陕西西安710077

出　　处：《能源与环保》2021年第6期70-74,共5页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家重点研发计划资助项目(2018YFC0807804-2);陕西省自然科学基金资助项目(2020JQ-994)。

摘　　要：断层是导通含水层的主要通道,在煤矿生产过程中采用物探、钻探等手段提前查明断层富水性是非常必要的工作。针对该问题,通过在探查钻孔中采用钻孔瞬变电磁法三分量探测技术,通过理论数值模拟和在济宁三号煤矿应用表明,钻孔瞬变电磁法三分量中的X、Y分量响应形态的“S”形态和反“S”形态以及Z分量的单峰形态,可以判断出异常在钻孔周围的空间展布范围,孔中噪声水平更低、探测半径可以达到32 m,探测结果对异常地质体的划分更加精细,通过三维空间成图判别了异常体主要来自煤层顶板,指导了矿方后续该区域的防治水工作,证明了该方法的有效性,同时为煤矿巷道掘进和工作面回采前的地质预报提供了新的技术手段。Faults are the main channel for conducting aquifers.It is very necessary to use geophysical prospecting,drilling and other means in the coal production process to find out the water richness of faults in advance.In response to this problem,the use of transient electromagnetic in the hole in the exploration drilling three-component detection technology,through theoretical theoretical numerical simulation and application results in Jining No.3 Coal Mine,shows that the X and Y components of the three-component response of the transient electromagnetic method in the hole are"S"and"reverse S"and Z components.The single-peak shape of the hole can determine the spatial distribution range of the anomaly around the borehole;the noise level in the hole is lower,and the detection radius can reach 32 m.The detection result divides the abnormal geological body more finely,which can be judged by three-dimensional space mapping.The anomalous body mainly comes from the roof of the coal seam,which guides the mine′s subsequent water prevention and control work in this area,proves the effectiveness of this method,and also provides new technical means for geological prediction before coal mine tunneling and mining face.

关 键 词：钻孔瞬变电磁法 数值模拟 断层 三分量 

分 类 号：TD745.2[矿业工程—矿井通风与安全]