多种勘察方法在复杂山区煤矿采空区岩土工程勘察中的应用

Application of various investigation methods in geotechnical engineering investigation of goaf in complex mountain coal mine

为了在复杂山区煤矿采空区岩土工程勘察中得到更好的勘察效果,采用测氡法、高密度电阻率法、瞬变电磁法、微动探测4种勘察方法共同对研究区域开展勘察。测氡法根据采空区周围应力变化获得勘察结果;高密度电阻率法专门针对地形较为复杂的环境开展勘察工作;瞬变电磁法能够勘察出研究区域中不同深度位置的地电特征,获得工程勘察结果;微动探测勘察方法能够获得工程结构勘察结果。勘察结果表明,氡气值较高、高密度电阻率和瞬变电磁电阻值较高的区域均为复杂山区煤矿采空区,使用微动探测勘察方法的误差较小,能够获得准确的勘察结果,勘察效果总体较好,能够勘察出煤矿采空区。

To get a better investigation effect in the geotechnical engineering investigation in the complex mountainous area of coal mine goaf.In this paper,a variety of investigation methods were studied and analyzed in the investigation process for the application effect.The radon measurement method,high-density resistivity method,transient electromagnetic method and micro-motion detection were used to investigate the study area collectively.The survey results were obtained from the radon measurement method according to the stress changes around the goaf.The high-density resistivity method was specially designed for the environment with complex topography.The geoelectric characteristics of different depth positions in the study area can be investigated by the transient electromagnetic method,and the engineering investigation results can be obtained.The engineering structure surveying results can be obtained by the micro-motion detection surveying method.The survey results show that the areas with high radon gas value,high density resistivity and high transient electromagnetic resistance value are all goaf of coal mines in complex mountainous areas.Accurate survey results can be obtained from the micro-motion exploration with less error.The overall survey effect is good,and the goaf of coal mines can be explored.