Bureinsk coal basin
BUREINSK COAL BASIN (RU: Буреинский угольный бассейн) is located within the Khabarovsk territory of the Russian Federation. The area is 6000 square kilometres. The reserves of the coals within the basin are estimated at 10.9 billion tonnes. The basin is connected by the railway branch with the Moscow - Vladivostok main railway line. The basin has been discovered during the 1844, and is being developed since the 1939.
The Bureinsk coal basin represents by itself the basin, which is bounded by the mountain ranges and plateaus. In the geological sense, it is the complicatedly built syncline, which is stretched along the north-easterly direction for 150 kilometres, with the width of 50-60 kilometres. Within the eastern part, there exist the large broad asymmetric synclines, the central part is intensely dislocated (here are developed the brachystructures, the small folds with the steeply dipping limbs, and with the ruptured disturbances), the western part, namely, the near-Bureinsk syncline, is poorly studied. The geological-industrial regions (from the south to the north) are: Agdynya-Chekunsk (Dublikansk), Central, Urgalsk, near-Bureinsk, Olanzhinsk-Ioriksk, Umaltinsk. The coal-bearing depositions (Upper Jurassic - Lower Cretaceous), with the thickness of approximately 2000 metres, are sub-divided into the 5 stratigraphic suites; there is most coal-bearing the Urgalsk suite, which is containing up to 50 coal layers and interlayers. There has been studied in details the Urgalsk deposit, which is being developed, within the eastern part of the basin (within the limits of the syncline with the same name), where have been unsealed 35 layers with the thickness of 1-6.4 metres, of which 10 belong to the orderly and relatively orderly types. The reserves of the coal within the deposit, which have been explored (to the depth of 300 metres), are 1078 million tonnes, while the reserves, which have been estimated in advance, are 863 million tonnes (1980). The development of the coals is performed mostly by the underground method, less often by the opencast methods.
The mining-geological conditions are characterized by the existence of the discontinuous permafrost. The water inflows into the underground mine are approximately 1000 cubic metres per hour, while during the further development of the mining works, the possible maximal water inflow is estimated at 3000 cubic metres per hour. According to the danger because of gas and dust, this underground mine belongs to the I category (see the "Gas regime" article). The extraction is 1722 thousand tonnes (1980), including 246 thousand tonnes by the opencast method. The coals are mineral, of the G mark. The major indicators for the quality of the coals, which are being extracted, are: Wr is 7.5%, Ad is 32%, Sfd is 0.4%, Qf daf is 33.3 megajoules per kilogram, Qi r is 19.97 megajoules per kilogram. The beneficiation of the coals is very difficult. The coals are used as the energetical fuel at the CHP combined heat and electrical power plants (80%), and at the various enterprises within the Magadan province, and within the Khabarovsk and Primorye territories.
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