煤矿采空区瞬变电磁法物探应用实例

Application of transient electromagnetic method in geophysical exploration of mine goaf

随着城镇化进程的加快,建筑公路铁路桥梁的建设也逐渐向地质条件较差的采空区推进。为探寻进行采空区物探评价的有效方法,开展了瞬变电磁法在邯郸峰峰矿区某采空区物探的实践应用。在原有地质资料的基础上,详述了瞬变电磁法的基本原理以及测点测线的具体布置方案以及数据处理方法;并对所取得的视电阻断面图进行实例分析,且对视电阻率异常区域进行了钻探验证。实践表明,该方法的应用可以准确反映异常区的位置和深度,而且还展现了异常区的影响范围,是较好并且直观的呈现手段。

With the acceleration of urbanization,the construction of buildings,highways,railways and bridges is gradually advancing to areas with poor geological conditions.In order to explore effective methods of geophysical exploration for goaf,practice of transient electromagnetic method in geophysical exploration in goaf of Fengfeng mining area was carried out.On the basis of the existing geological data,based on the basic principle of transient electromagnetic method,the specific layout plan and data processing method of measuring points and lines were put forward,the acquired apparent resistance cross-section maps were analyzed,and the abnormal area of apparent resistivity was verified by drillings.Practice shows that the application of this method can accurately reflect the location,depth and influence area of the abnormal area,and is a better and intuitive geophysical method.