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爆轰波在岩层传播的衰减特性使得采空区周围的电阻率分布发生规律性变化。基于此变化规律,使用超高密度电法勘探采空区周围电阻率分布并对电阻率沿爆轰波传播方向进行拟合计算,采空区边界与其一阶导数数值最大区域相切。结合相邻测线的勘探结果可以得到采空区空间位置、走向以及体积等参数,为采空区的治理提供了精准有效的数据支撑,从而减少了采空区带来的安全危害。
The decay characteristic of detonation wave propagating in rock strata causes regular changes of the resistivity distribution around the goaf. Based on this variation, the resistivity distribution around the goaf is explored using ultra-high density electrical method and the resistivity is fitted to the propagation direction of the detonation wave. The boundary of the goaf is tangent to the maximum value of the first derivative. Combined with the exploration results of adjacent survey lines, the spatial location, direction and volume of the goaf can be obtained, which provides accurate and effective data support for the goaf management, thus reducing the safety hazard caused by the goaf.