Purpose - development and approbation of a new method for determining the degree of coal metamorphism by the index of gray shade intensity of macerals for microphotographs of lump sections of coal samples. Optical spectroscopy using a video-optical complex: MBI - 11, HB 200, followed by digital computer processing (Scope photo software) of microphotographs of coal substance samples upon lump sections. A new method is proposed for determining the degree of coal substance metamorphism, the essence of which is the use of optical microscopy of lump sections of coal samples, followed by digital processing of the obtained data. The method was tested on coal samples of various ranks - from long-flame to anthracite. To characterize the degree of coal metamorphism, a new index of the gray shade intensity of macerals was applied on the photographic images of the lump sections of coal samples microscopically. Correlation of the proposed index with the classical ones of the degree of coal metamorphism - vitrinite reflectance is shown. For the first time, a digital processing of photographic images of the lump sections of coal samples using a new index of gray shade intensity of macerals was applied to characterize the degree of coal metamorphism. The proposed method can be used for practical application in order to assess the degree of coal metamorphism. This method differs by its operability and simplicity from the currently widely used one for determining the degree of coal metamorphism by vitrinite reflectance. The method can also be applied to assess the recoverability of coals and calculation of their maceral composition.

Purpose. To develop an algorithm of forecasting the methane emission from the undermined coalrock massif according to the data of coal production, the values of absolute methane content of a mine and indexes of the methane-bearing capacity of coal beds that are developed. Methodology. Statistical processing of actual data concerning the methane-bearing capacity of coal beds that are developed as well as the volumes of methane emission and coal production. Based on the obtained stable values of the specific methane emission and the volumes of coal production, the total volumes of methane entry are calculated, and with the exception of methane release from the coal beds, the volumes of methane entry from the coalrock massif are estimated. Findings. The algorithm of forecasting the quantity evaluation for methane emission from the undermined coalrock massif in operating coal mines is developed. Data analysis 10 years concerning the methane emission while coal beds mining at "Pivdenno-Donbaska-1" and "Pivdenno-Donbaska-3" mines has been carried out for. An algorithm has been developed for the forecasting factor of methane emission from the undermined coalrock massif, which consists in establishing generalized values of methane emissions into a mine, calculating specific methane emissions from coal, based on the natural and residual methane bearing capacity of coal beds that are developed and a rough estimate for the amount of methane emission from the rock massif containing working coal beds. Originality. The algorithm for quantitative estimation of methane emission separately from the undermined coalrock massif was developed for the first time, and examples of its practical application by calculation of mining and geological data at "Pivdenno-Donbaska-1" and "Pivdenno-Donbaska-3" mines are presented. Practical values. The developed algorithm for calculating methane emission from the undermined coalrock massif can be used to forecast the methane emission of operating and closed mines in order to evaluate the possibility of its practical industrial production.

Індекс рубрикатора НБУВ: Д823.124.1 + Д17

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Шифр НБУВ: Ж16489 Пошук видання у каталогах НБУВ 

Шифр НБУВ: Ж16377 Пошук видання у каталогах НБУВ 

Шифр НБУВ: Ж16377 Пошук видання у каталогах НБУВ