求翻译：目前,用于矿井超前探测的电法勘探主要是直流电阻率法,包括点电源法、矿井电剖面法、巷道顶底板电测深法、层测深法、直流电透视法、高密度电阻率法等。是什么意思？

At present, advanced detection for mine electrical prospecting is the DC resistivity method, including the point of power law profile method of mine electrical sounding method of the tunnel roof and floor, layer sounding method, the DC perspective, high-density resistivity method and so on.

At present, early detection of the Mine Act -- mainly for exploration is DC resistance rate law, including the point-Power Law, mining (profile, gallery-top floor plate bathymetric sounding Law Law, fluoroscopy, DC resistivity method, high-density, such as law.

At present, uses in the electrical prospecting which the mine pit surveys in advance mainly is the resistivity, including the power source law, the mine pit electricity cross section method, the tunnel goes against the ledger wall electricity depth sounding law, the level depth sounding law, the dir

At present, the advance detection of mine electrical method exploration of main is a direct-current resistivity method, including profile power law, mine law, the tunnel roof and floor electrical sounding, layers, sounding, DC electrical method, high density resistivity method.

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