scholarly journals Finding of native tellurium in sublimates of a natural underground fire in the tract Kukhi-Malik at the Fan-Yagnob coal deposit (Tajikistan)

2019 ◽  
pp. 95-99
Author(s):  
Л.А. Паутов ◽  
М.А. Мираков ◽  
С. Махмадшариф ◽  
В.Ю. Карпенко ◽  
А.Р. Файзиев
Keyword(s):  
Coal Deposit ◽  
Underground Fire

Описывается находка самородного теллура в сублиматах высокотемпературных фумарол на природном подземном угольном пожаре в урочище Кухи-Малик около кишлака Рават на Фан-Ягнобском угольном месторождении в Согдийской области Таджикистана. Теллур представлен хорошо образованными призматическими кристаллами (0.1 мм), на которых наиболее развиты грани m 1010, 0112, r 1011, реже встречаются с 0001 и ряд неидентифицированных форм. В ассоциации с теллуром находятся сульфаты Fe и K, сульфат Tl и K и англезит. Кристаллы теллура зональные, центральная часть обогащена селеном (до 10 мас.). Приведены физические свойства и основные отражения рентгеновской порошкограммы.

scholarly journals Pauflerit β-VO (SO4) in the sublimates of a natural underground fire in the tract Kuhi-Malik (Rawat) at Fan- Yagnob coal deposit, Tajikistan

2019 ◽  
pp. 114-121
Author(s):  
М.А. Мираков ◽  
Л.А. Паутов ◽  
В.Ю. Карпенко ◽  
А.Р. Файзиев ◽  
С. Махмадшариф
Keyword(s):  
Coal Deposit ◽  
Underground Fire

Приведено описание находки пауфлерита -VO(SO4) в возгонах высокотемпературных выходов газов природного угольного пожара в урочище Кухи-Малик близ кишлака Рават, Фан-Ягнобское угольное м-ние, Таджикистан, в брекчированных алевролитах. Кристаллы пауфлерита удлиненно-призматические, имеют размеры 40100 мкм простые формы: b010, m 101 (наиболее развита), е 110, p 111, 212. Наблюдаются двойники по (010) (). Минерал прозрачный, зеленого цвета, хрупкий. Блеск стеклянный. Пауфлерит оптически двуосный, 2V близок к 90. Дисперсия оптических осей очень слабая, v r. Плоскость оптических осей перпендикулярна удлинению кристаллов np 1.733(2), nm 1.778(3), ng расч. 1.823(4). Плеохроизм: по Ng зеленая окраска, по Nm и Np светло-зеленая. Схема абсорбции Ng Nm Np. Состав (ср. по 3 ан., электронно-зондовые данные, мас.): VO2 49.87, SO3 50.01, сумма 99.88. Эмпирическая формула V0.97O(S1.02O4). Параметры ромбической элементарной ячейки (): a 7.392(3), b 6.272(2), c 7.064(3). Впервые приведены порошковая рентгенограмма и чертежи кристаллов пауфлерита. По присутствию минеральных фаз V, Cd, Mo, Tl, Bi, Sn, In, Sb, Se, Te, As возгоны угольного пожара на Фан-Ягнобском месторождении близки к возгонам вулканических фумарол Камчатки, Курил, Италии, что связано с общностью механизмов извлечения газами этих элементов из вмещающих пород, их переноса и отложения в зонах разгрузки.

Ecological advantages of underground coal gasification in the Republic of Tuva

2018 ◽  
Vol 22 (10) ◽  
pp. 60-65
Author(s):  
M.P. Kulikova ◽  
G.F. Balakina
Keyword(s):  
Coal Gasification ◽  
Underground Coal Gasification ◽  
Coal Deposit ◽  
Thermal Generation ◽  
Hydrocarbon Gas ◽  
Underground Fire ◽  
The Republic ◽  
Product Pipeline ◽  
Gas Supply

Based on the analysis of the current situation with gas supply in the region (low gas supply of the population, lack of thermal generation based on gas), possible ways of solving the problem of providing gas for housing, industrial and communal facilities in the Republic of Tuva are being considered. The results of a study of the possibilities of using liquefied hydrocarbon gas, gas extracted from coal mining in the Ulug-Khem basin, gas from the underground fire of the Erbeksky coal deposit are presented. The needs for gas of all categories of consumers are estimated: the population, thermal generation enterprises, social and household spheres in the region. Prospects for gas supply are set out in connection with the solution of environmental problems: the reduction of air pollution in cities and towns. The directions of the solution of the problem of gasification of Tuva in the long-term prospect are substantiated, options for transferring the economy of the republic to the main gas supply, construction of the oil product pipeline are considered.

Trace elements in the Goze Delchev coal deposit, Bulgaria

2007 ◽  
Vol 72 (3-4) ◽  
pp. 257-267 ◽  
Author(s):  
G.M. Eskenazy ◽  
Y.S. Stefanova
Keyword(s):  
Trace Elements ◽  
Coal Deposit

scholarly journals Emplacement and biodegradation of oil in fractured basement: the ‘coal’ deposit in Moinian gneiss at Castle Leod, Ross-shire

2016 ◽  
Vol 107 (1) ◽  
pp. 23-32 ◽  
Author(s):  
John Parnell ◽  
Mas'ud Baba ◽  
Stephen Bowden
Keyword(s):  
Lower Devonian ◽  
Fluid Pressure ◽  
Low Permeability ◽  
Coal Deposit ◽  
Basin Inversion ◽  
Mineral Phases ◽  
Metamorphic Basement ◽  
Major Fault ◽  
High Fluid ◽  
Transfer Faults

ABSTRACTBitumen veins were formerly mined as ‘coal’ from Moinian metamorphic basement at Castle Leod, Strathpeffer, Ross-shire. The abundance and spatial concentration of hydrocarbons implies generation of a large volume of oil that exerted a fluid pressure great enough to open veins to 1+ m width. Biomarker characteristics, including β-carotane and a high proportion of C28 steranes, correlate the bitumen to Lower Devonian non-marine shales separated from the Moinian basement by a major fault. Bitumen in the Moinian basement has higher diasterane/sterane ratios than bitumen in the Devonian sequence, indicating greater levels of biodegradation, which may reflect more interaction with water in the basement. Replacive bitumen nodules in the Moinian basement, containing thoriferous/uraniferous mineral phases, are comparable with bitumen nodules in basement terrains elsewhere. Formation of the nodules represents hydrocarbon penetration of low-permeability basement, consistent with high fluid pressure. Bitumen veins are particularly orientated E–W, and may be associated with E–W transfer faults attributed to Permo-Carboniferous basin inversion.

scholarly journals Computer Simulation of the King's Cross Fire: Effect of Radiative Heat Transfer on Fire Spread

1991 ◽  
Vol 205 (3) ◽  
pp. 201-208 ◽  
Author(s):  
W M G Malalasekera ◽  
F Lockwood
Keyword(s):  
Mathematical Model ◽  
Radiative Heat ◽  
Health And Safety ◽  
Fire Spread ◽  
Future Research ◽  
Full Description ◽  
Department Of Health ◽  
Underground Fire ◽  
The Mathematical Model ◽  
Good Agreement

A mathematical model has been applied to simulate model experiments of the 1987 King's Cross underground fire by the Department of Health and Safety Executive. The predicted growth of the fire is compared with the experimental data and in particular the predicted and measured times to ‘flashover’ are compared. The comparisons show exceptional agreement which, in part, may be fortuitous due to the need to facilitate the prediction of the early stages of the growth with the aid of an experimentally estimated fire strength. The good agreement nonetheless is also due to the full description of the radiation transfer which is a feature of the mathematical model. It is concluded that the flashover phenomenon that occurred at King's Cross was thermal radiation driven and that future research should be devoted to modelling the details of fire spread across a combustible surface.

3D modeling and reserve estimation of a coal deposit using neural networks

2018 ◽  
pp. 773-776
Author(s):  
H. Akcakoca ◽  
K. Erarslan ◽  
N. Çelebi ◽  
A.G. Pasamehmetoglu
Keyword(s):  
Neural Networks ◽  
3D Modeling ◽  
Coal Deposit ◽  
Reserve Estimation
Sign in / Sign up

Export Citation Format

Share Document