Prospects for increasing the mineral resource base of the Lvov-Volyn coal basin are associated with the development of new areas and large horizons. One of the possible directions is the construction and operation of mining complexes within the fields of the South-Western coal-bearing region. In terms of the grade composition at the Tyaglov deposits, gas, gaseous fatty and fatty coals prevail. It has been proven that gas coal is suitable for coking. At the Lyubelya deposit, there are fatty, coke fatty and coke. Coking coal accounts for almost half of the deposit's reserves. The reserves and resources of coal in the region are estimated at more than 2 billion tons, which are twice the residual reserves of the industrial part of the basin. It is of great importance to study the layers v03, v04, v2, v4, v43, v54, v56, v6 and n06, related to the lower coal-bearing subformation of the basin. Prospects for the integrated development of ABL resources associated with the gas content of the coal-bearing strata. Deposits of the Lvov-Volyn basin can, to a certain extent, be considered as complex gas-coal. The Southwestern coal-bearing region and deep horizons of the basin are especially promising.
Sudden coal and gas outbursts in coal mines are one of the most harmful and at the same time, dangerous gas-dynamic phenomena faced when coal producting. The sudden coal and gas outbursts is the evanescent destruction of the bottom-hole area in the coal bed, which develops from the bottom into the depth of a massif, and the crushed coal with gas is thrown to a long distance from the bottom into the mine, destroying everything in its way, creating the conditions for explosion and fire breaking-out. Sudden outbursts lead to significant material losses for the recovery from an accident and in some cases injuries and human losses. The problem of reliable prediction, prevention, and control of sudden coal and gas outbursts at coal mines remains extremely urgent, due to the constant increase in the depth of mining operations. The analysis of the experience of predicting and preventing the outburst hazard in coal beds of Donets and Lviv-Volyn coal basins is analyzed. At Donbas mines since 1906, there have been more than 7.5 thousand sudden outbursts. Although mining had now reached considerable depths (from 300 to 600 m), the emergence of coal and gas outbursts have not been recorded. The purpose of the research is to determine the depth of the possible emergence of sudden coal and gas outbursts in the LVB, with regard to the peculiarities of the geological structure of the coal-bearing strata in the Lviv-Volyn coal basin. The comparative possible depth estimation in the manifestation of the outburst hazard of the coal beds in the LVB is given. It is calculated according to the normative technique and performed according to the formulas obtained by the statistical analysis for the actual position of the minimum depth of coal and gas outbursts at the Donbas mines. The absence of sudden coal and gas outbursts at LVB mines on the coal beds, which are hazardous according to the prediction data, is performed according to the methods regulated by the normative documents and compiled by the experience of studying the outbursts in Donbas, is explained by the differences in the geological structure of the LVB, the main of which is the presence of thick mass of covering deposits and a significantly greater depth of the methane gas zone. The application of the empirical formulas prediction, which includes the methane gas zone depth index, allows us to account for these differences and it is much more reliable to determine the possible depths of sudden outbursts for LVB, which, all other things being equal, should be greater than in the Donbas. In particular, according to the performed calculations, the outburst hazard situation at the “Stepova” mine is predicted at depths of more than 700 m. As prediction indices for the calculations, values of methane gas zone depths of 450 m were adopted, and the minimum value of volatile-matter yield was 33.3%. This approach can be proposed for predicting the coal and gas outbursts hazard in other Lviv-Volyn basin mines. To determine the predicted depth of the possible emergence of sudden coal and gas outbursts, it is advisable to take into account the depth of the methane gas zone in the prediction calculations.
Conditions of the beginning of Carboniferous coal formation (Late Tournaisian-the beginning of Late Visean) in Lviv Volyn basin are reconstructed. First signs of coal formation processes are established in Late Tournaisian deposits. Process of orig ination of coal bearing formation proceeded gradually and were characterised by unfavourable conditions. Appearance of environments favourable for to extension paleo peat bogs refers to Early Visean. Late Tournaisian deposits of Khoriv suite cor respond to "germinal" period of development of coal bearing formation of Lvіv Volyn basin, that is why its lower boundary is held in the base of the mentioned suite.
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