MINING BLOCK STABILITY ANALYSIS IN ESTONIAN OIL SHALE MINES BY STATISTICAL METHODS

Carcinogenicity studies of Estonian oil shale soots.

Several series of chronic experiments in white mice and white rats were carried out in order to determine the carcinogenicity of Estonian oil shale soot as well as the soot from oil shale fuel oil. All the investigated samples of soot showed a relatively low (from 14 to 1200 ppm) benzo(a)pyrene content. The benzene extract of oil shale soot, painted on the skin of white mice, proved to be stron...

Towards Multifunctionality of Mining Landscapes in the Estonian Oil Shale Basin: Typologies, Assessment and Planning

The paper introduces the landscape assessment approach for the post-mining landscapes in the Estonian oil shale open-cast mines. Typologies of mining landscapes are based on landscape pattern, features and functions predetermined by mining technologies. The open-cast mines which have been predominantly subjected to monofunctional reforestation should direct to diversification of landscape and i...

Morphological investigations of fibrogenic action of Estonian oil shale dust.

A review of morphological investigations carried out to clarify the pathogenicity of industrial dust produced in the mining and processing of Estonian oil shale is given. Histological examination of lungs of workers in the oil shale industry taken at necropsies showed that the inhalation of oil shale dust over a long period (more than 20 years) may cause the development of occupational pneumoco...

Research on Electric Heating Technology In-situ Oil Shale Mining

The oil shale resources are very abundant with its reserve three times as much as world’s proven oil reserve. However, by the limitations of traditional technology and mining methods, the development of oil shale technology is restricted to a great extent. Now researchers are studying the in-situ retorting technology through heating the underground oil shale directly. Then the released oil and ...

A study on the EU oil shale industry – viewed in the light of the Estonian experience