多种物探方法在采空区勘察中的应用

Application of Multiple Physical Exploration Methods in Survey of the Goaf

受开采技术的影响,部分煤矿开采后会在岩体中留下采空区。若不能准确探明采空区的分布规律和影响范围并加以控制,将会给后续的煤矿开采带来极大的安全隐患。首先,采用瞬变电磁法(TEM)和可控源音频大地电磁法(CSAMT)等物探方法,详细调查了山西某煤矿采空区的分布及积水情况。然后,利用钻孔探测方法对多种物探得到的采空区范围进行验证。结果表明,采用瞬变电磁法和可控源音频大地电磁法,结合钻孔探测方法,可以达到精准勘探煤矿采空区的目的。

Due to the influence of mining technology,some coal mines may leave goaf in the rock mass after mining.If the distribution pattern and impact range of goaf cannot be accurately identified and controlled,it will bring great safety hazards to subsequent coal mining.Firstly,various geophysical methods such as transient electromagnetic method(TEM)and controllable source audio magnetotelluric method(CSAMT)were used to investigate in detail the distribution and water accumulation in the goaf of a coal mine in Shanxi Province.Then,the drilling detection method is used to verify the range of goaf obtained from various geophysical surveys.The results indicate that the use of transient electromagnetic method and controllable source audio magnetotelluric method,combined with drilling detection method,can achieve the goal of precise exploration of coal mine goaf.