Natural gas methane number and its influence on the gas engine working process efficiency

Didmanidze, Otari N.; Afanasev, A. D.; Хакимов, Р. Т.

doi:10.31897/pmi.2021.5.12

Cited by 3 publications

(4 citation statements)

References 8 publications

(1 reference statement)

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“…Mathematical model. The input value for modeling an optoelectronic sensor is the measured gas level, which is the integral transmittance of the gas cell's optical radiation [24,72,73].…”

Section: Resultsmentioning

confidence: 99%

Methane Emission Estimation Tools as a Basis for Sustainable Underground Mining of Gas-Bearing Coal Seams

Sidorenko,

Trushnikov,

Sidorenko

2024

Sustainability

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Underground coal mining of gas-bearing coal seams is accompanied by the emission of large amounts of methane, which increases with depth. Coal seam methane is not only a major cause of major accidents in coal mines, but is also a greenhouse gas that has a significant negative impact on the Earth’s atmosphere. Analysis of the efficiency of underground coal mining suggests that as the depth of mining increases, the productivity of a longwall decreases by a factor of 3–5 or more, while the specific volume of methane emitted increases manifold and the efficiency of methane management decreases. Effective management of coal seam methane can only be achieved by monitoring its content at key points in a system of workings. Monitoring of methane not only eliminates the risk of explosions, but also lets us assess the effectiveness of using methane management techniques and their parameters to improve efficiency and reduce the cost of methane management (including a methane drainage) for ensuring sustainable underground coal mining. The aim of this article is to develop a software and hardware complex for monitoring methane in a coal mine by creating a simulation model for monitoring methane. The Arduino Uno board and the methane sensor MQ-4 were used for this purpose. In this article, the causes of methane emissions in coal mines, gas control systems, the structure of the mine monitoring system, and the causes of risks and occurrence of accidents in coal mines are considered. As a result of the work, the mathematical model of the methane measurement sensor was developed; the Arduino Uno board developed a simulation system for methane monitoring; and the numerical results of the research are presented in the graphs.

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“…Mathematical model. The input value for modeling an optoelectronic sensor is the measured gas level, which is the integral transmittance of the gas cell's optical radiation [24,72,73].…”

Section: Resultsmentioning

confidence: 99%

Methane Emission Estimation Tools as a Basis for Sustainable Underground Mining of Gas-Bearing Coal Seams

Sidorenko,

Trushnikov,

Sidorenko

2024

Sustainability

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“…Then, formed cracks and stratifications cause water to break through into the mine, leading to flooding and karst hole, which increase over time (Figure 4). To date, about 50% of potash mines have been flooded, and reserves have been lost [42]. Two mines at the Verkhnekamsk deposit were flooded in 1986 and 2006 due to the disturbed overlying rocks, resulting in sinkholes at the water intrusion sites.…”

Section: Induced and Ecological Problemsmentioning

confidence: 99%

Section: Induced and Ecological Problemsmentioning

confidence: 99%

Principles of Sustainable Development of Georesources as a Way to Reduce Urban Vulnerability

Kongar-Syuryun,

Klyuev,

Golik

et al. 2024

Urban Science

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Humanity development is associated with higher spiritual and social behaviour and financial shape, which is an undeniable factor of urbanisation. Previously, in areas of georesource concentration, cities and settlements were formed with people exploiting these georesources. However, imperfect technologies lead to rapid depletion of reserves and industrial and environmental disasters, which affect the vulnerability of cities and the people living in them. The analysis of applied technologies has demonstrated that potash extraction is accompanied by a low recovery ratio, high mine accidents, and environmental problems. The principles of sustainable development of geo-resources for the creation of mining technologies that ensure industrial safety, environmental sustainability, and extending the life of the mining enterprise to save working places will reduce the vulnerability of cities. This article proposes the use of the room-and-pillar mining method with the replacement of natural supports with artificial ones. Three-stage stoping with backfill is considered. Numerical modelling has shown stabilisation of mining and geomechanical processes, which confirms the prospectivity of the method with backfill. For these purposes, this research presents a new backfill composition based on local industrial waste. Schemes of backfill preparation and feeding into the mined-out space are proposed. The proposed technology, based on the principles of sustainable development of georesources, is the foundation for an economically profitable, environmentally friendly, and socially responsible mining enterprise. The implementation of the principles of sustainable development of georesources will allow for the preservation of cities and reduce their vulnerability.

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“…It is sufficient to consider the risks from the presence of hazardous components in industrial waste and the likelihood of their spread and impact. Such risks are noticeably reduced when the harmful effects are neutralized by reducing hazardous elements in industrial waste [7] or mined-out gas [40,41] to zero.…”

Section: 𝐸 ∑ ∑ 𝐶 ∑ 𝐶 𝑄 mentioning

confidence: 99%

Comprehensive Recovery of Metals in Tailings Utilization with Mechanochemical Activation

Golik,

Mitsik,

Aleksakhina

et al. 2023

Resources

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The paper analyzes the results of metal extraction from tailings of ore processing based on traditional approaches. The history of methods of secondary processing of mineral raw materials is described. The technique and features of mechanochemical activation of the leaching process of metal ores and coals are described. The results of laboratory studies of a new mechanochemical technology for metal extraction are presented. A description of the compromise optimal criterion formulated in the model of extraction of metals from tailings with substandard mineral raw materials based on the mathematical planning of the experiment, regression analysis methods and consideration of sanitary standards for the disposal of processing tailings is proposed. Mechanochemical technology results in economic and environmental effects from the utilization of processing tailings and radical strengthening of the mineral resource base of the mining industry.

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Natural gas methane number and its influence on the gas engine working process efficiency

Cited by 3 publications

References 8 publications

Methane Emission Estimation Tools as a Basis for Sustainable Underground Mining of Gas-Bearing Coal Seams

Methane Emission Estimation Tools as a Basis for Sustainable Underground Mining of Gas-Bearing Coal Seams

Principles of Sustainable Development of Georesources as a Way to Reduce Urban Vulnerability

Comprehensive Recovery of Metals in Tailings Utilization with Mechanochemical Activation

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