The Development of the Toxic and Flammable Gases Concentration Monitoring System for Coalmines

Martirosyan, Alexander V.; Ilyushin, Yury V.

doi:10.3390/en15238917

Cited by 24 publications

(11 citation statements)

References 19 publications

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“…Fossil energy sources offer advantages in the thermal energy infrastructure in Vietnam [33]. Boiler systems, power plants, and transmission systems have been designed for efficient operation and use [34]. Fossil energy, widely employed for decades, continues to provide stable electricity [35].…”

Section: Fossil Energy (1) Coalmentioning

confidence: 99%

Energy Transition in Vietnam: A Strategic Analysis and Forecast

Nguyen,

Ponomarenko,

Nguyen

2024

Sustainability

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Energy landscapes in Asia and other regions are currently undergoing a transformation aimed at increasing the share of clean energy sources. This article analyzes and forecasts the electricity demand in Vietnam, examining existing constraints that necessitate the shift from coal to renewable energy sources. The rapid economic growth in Vietnam is driving a substantial surge in electricity demand, projected to reach 124 thousand MW by 2030 according to the National Electricity Plan, positioning Vietnam second in Southeast Asia. This surge poses a significant challenge to national energy security, given the impracticality of effective coal mining in the country and the imperative to develop renewable energy sources. Anticipating the changes in Vietnam’s energy mix by 2050, this study foresees a substantial reduction in dependence on coal production. Government investment and green energy investment funds such as JETP are strategically directed towards renewable energy sources, including solar, wind, biomass, hydrogen energy, and efficient energy storage technologies. Consequently, this research substantiates the viability of an energy transition from coal to green energy in Vietnam. The article presents an assessment of the rate of replacing coal with renewable energy sources, taking into consideration various scenarios for economic development, energy consumption growth, and the utilization of renewable energy sources.

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Section: Fossil Energy (1) Coalmentioning

confidence: 99%

Energy Transition in Vietnam: A Strategic Analysis and Forecast

Nguyen,

Ponomarenko,

Nguyen

2024

Sustainability

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“…The coal decomposed at high temperatures to produce a large number of gases, which continued to heat and cause the volume to expand sharply. The coal body produced a high local tensile stress, and there was typical reaming and opening of new holes [51].…”

Section: Coal Rock Damage Factors and Meso-fractal Descriptionmentioning

confidence: 99%

Experimental Investigation on the Influence of Temperature on Coal and Gas Outbursts

Wang

et al. 2023

Processes

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With the increasing mining depth, the dynamic disaster of coal and gas outbursts in coal mines has become increasingly prominent, and the bursting liability of coal and rock mass in deep coal seam mining is a necessary condition for the occurrence of rock burst and an important index to measure the failure of coal and rock mass. Thermal damage leads to rock instability and failure, which seriously influences the safe and efficient operation of coal mines. To investigate the effect of thermal damage on the bursting liability of deep coals, the burst tendency index of standard coal was measured after subjecting it to thermal damage at different temperatures. The effects of different thermal damage temperatures on the uniaxial compressive strength index, dynamic failure duration, stiffness ratio index, effective impact energy index, residual energy index change rate, and impact energy velocity of the coal and the influence of the post-peak failure mode of the coal were evaluated. The results revealed that the uniaxial compressive strength of the coal generally decreased with increasing thermal damage temperature. At temperatures above 200 °C, the strength significantly decreased. The comprehensive impact property index indicated that, with increasing thermal impact temperature, the burst tendency first increased up to the peak value at 200 °C and then gradually decreased. With the increase in the thermal damage temperature, the burst tendency decreased and disappeared in the temperature range of 250–300 °C, and the failure mode of the coal changed from brittle failure to brittle plastic failure, and finally ductile failure. The influence of thermal damage on coal bursting liability is studied, which provides a theoretical basis for preventing and controlling coal impact ground pressure hazards.

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“…The deflagration fracture is initiated from the natural fracture near two ends of the radial well, and the fracture width and the reservoir stimulation volume increase. Reservoir fractures, stratigraphy, or reservoir fluids can all have an impact on the form of rock mechanics and how it ruptures [32,33]. Considering the micro-fractures in the rock around the radial well, the effects of micro-fracture distribution on the deflagration fracture are analyzed.…”

Section: Effect Of Natural Fracture Density On Fracture Propagationmentioning

confidence: 99%

Numerical Simulation on Radial Well Deflagration Fracturing Based on Phase Field Method

et al. 2023

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A radial well has a unique wellbore configuration. Fracture propagation in radial well deflagration fracturing is studied rarely. The mechanism of interaction between deflagration fractures, natural fractures, and micro-fractures is still unknown. Based on continuum mechanics, damage mechanics, and variational principles, a numerical model of fracture propagation in deflagration fracturing is established with the Hamilton principle and phase-field fracture theory. The effects of horizontal principal stress difference, natural fracture distribution, and micro-fractures around the wellbore on fracture propagation in deflagration fracturing are studied. First, when no natural fractures are developed around the radial well, fractures are initiated at both ends of the radial well. Second, when there are three natural fractures around the radial well, the created fractures have the morphology of shorter fractures in the middle and longer fractures on both sides under stress interference mechanisms. Third, a larger density of natural fractures causes obvious stress superposition, changes the initiation points of radial wells and fracture morphology, and increases fracture width and reservoir stimulation volume. Fourth, as the micro-fractures increase, their interference and induction effects on deflagration fractures are enhanced gradually, and the deflection angle of fractures increases by 38.7%. The study provides a reference for optimizing deflagration fracturing in a radial well.

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The Development of the Toxic and Flammable Gases Concentration Monitoring System for Coalmines

Cited by 24 publications

References 19 publications

Energy Transition in Vietnam: A Strategic Analysis and Forecast

Energy Transition in Vietnam: A Strategic Analysis and Forecast

Experimental Investigation on the Influence of Temperature on Coal and Gas Outbursts

Numerical Simulation on Radial Well Deflagration Fracturing Based on Phase Field Method

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