Distribution of Dictyonema shale and its self-heating regime in dumps of Maardu phosphorite open-cut mine

The authors present analysis results of the distribution of dictyonema shale in the dumps according to data of radioactive carottage of specially bored cores and other geological and mining-geological documentation, as well as measurements of tempera- ture in the dumped mass at various depths. The regularities of self-heating and self-ignition of shale have been determined as being dependent on the aeration conditions of the dumped mass.