The in-use techniques for predicting the time of earthquakes at potassium mines include drilling hydro-geological wells and measuring the underground water level therein, which serves the basis to judge of the time of the impending earthquake. The proposed technique additionally provides for measuring the concentration of methane, hydrogen and carbon dioxide by taking gas samples from the wells. To this end, the wells are drilled within the contours of well fields down to persalt desalinized layer, 1.5 m below its bed, then filters are installed at the persalt desalinized layer level to be followed by fitting in a parker (which is a device lowered on tubes down the well for separating the bed from the drill string-borehole annular, G.Ch.) to prevent uncontrolled gas leakage. The judgment of the estimated time of a coming earthquake is thus made on the basis of the rise of the concentration of methane, hydrogen and carbon dioxide.

Back