Mine Safety Technology Branch, China Coal Research Institute State Key Laboratory of Coal Mining and Clean
Uilization Bejing Mine Safety Engineering Technology Research Center

为研究瞬变电磁法检测采空区超高水材料注浆治理效果的可行性,采用1D正演得到了采空区注浆前后的瞬变电磁响应数据,并对其进行了反演。结果表明:根据注浆前采空区充水性的不同,充水与不充水情况下注浆后二次场感应电压的最大增幅分别约为40%或100%,反演后相应的视电阻率至少降低20%。在华北某矿采空区超高水材料注浆治理效果检测中:证实了注浆前后视电阻率的变化特征与理论结果相符,以视电阻率降低20%为边界推断的有效注浆区域基本准确,证实该方法是可行有效的。

In order to study the feasibility of TEM inspecting the effect of goaf treatment with grouting super high water material, 1D forward modeling was used to obtain the TEM response data before and after grouting, then the data was inversed. The result showed that there were obvious differences between before and after, a fter grouting the max amplification of secondary field induced voltage would be about 40% or100% depending on whether goaf had been water-accumulating or not befo re, the corresponding apparent resistivity would decrease more than 20% after inversion. The practice at a coalmine of North China showed that the change features of apparent resistivity between before and after grouting coincided with the theoretical result, the effective grouted area inferred by the boundary whose apparent resistivit y had decreased more than 20% was basically accurate, this method was feasible and effective.

国家自然科学基金资助项目(51404139)；