Parameter optimization of coal face blasting for coal and gas outburst control

Yang, Wei; Wang, Wenyuan; Jia, Ru; Walton, Gabriel; Sinha, Sankhaneel; Chen, Qinghe; Lin, Baiquan; Jiao, Xiangdong

doi:10.1007/s10064-023-03086-7

Cited by 4 publications

(2 citation statements)

References 54 publications

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“…Currently, gas predrainage has found wide application in lowering the risk of coal and gas outburst in coal seams during underground mining. − However, as mining gradually extends toward deeper strata, the permeability of coal seams falls, accompanied by difficulty in gas desorption and flow and reduced efficiency of gas drainage . As a result, the safe mining of deep coal seams is faced with considerable challenges.…”

Section: Introductionmentioning

confidence: 99%

Changes in the Microstructure and Wettability of Water-Containing Coal after Hot Flue Gas (CO₂–N₂) Injection

Liu,

Zha,

Lin

et al. 2024

Energy Fuels

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This study aims to explore changes in the microstructure and wettability of water-containing coal after hot flue gas (CO 2 −N 2 ) injection. To achieve this aim, thermal modification was conducted on Wulan anthracite with the aid of an experimental platform for coal modification by hot flue gas injection, and changes in the microscopic characteristics before and after the modification were investigated by means of Fouriertransform infrared spectroscopy (FT-IR) and carbon-13 nuclear magnetic resonance ( 13 C NMR). The results demonstrate that affected by acidic and hydrothermal environments, some oxygencontaining functional groups and aliphatic side chains in the molecular structure become detached. To be specific, the coefficient of oxygen-containing functional groups I O declines by 19.3%, and the aliphatic carbon content f al decreases by 32.7%. With the obtained microscopic data, the coal macromolecular structure models before and after the modification were established and verified by inverting the 13 C NMR spectra, and the coal matrix models with a projection area of 100 nm 2 were also generated. Subsequently, the wetting behavior of a water cluster on the coal matrix model was simulated by a molecular dynamics method. Based on the simulation results, a method of characterizing the microscopic wettability according to the maximum spreading area H and the maximum height D was put forward. The results are pretty consistent with the experimentally measured wettability. These results can lay a foundation for researching the microscopic control mechanism of water-containing coal seam modification by hot flue gas injection.

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Section: Introductionmentioning

confidence: 99%

Changes in the Microstructure and Wettability of Water-Containing Coal after Hot Flue Gas (CO₂–N₂) Injection

Liu,

Zha,

Lin

et al. 2024

Energy Fuels

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“…Gas-related disasters associated with coal mining have long been a significant challenge, impeding the safety of coal mine production. − Gas extraction serves as a crucial technological approach for preventing and utilizing gas in coal mines. − The strength, deformation, and permeability of the coal seam play a vital role in determining the effectiveness of gas extraction in coal mines. − …”

Section: Introductionmentioning

confidence: 99%

Cracking Behavior and Stress Field Evolution in Coal Specimens Containing Bedding under Uniaxial Compression

Guo,

Wang,

Liu

et al. 2023

ACS Omega

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During the underground mining process, various coal seams with different bedding structures are often encountered. The presence of bedding structures is one of the primary factors that influence the strength and deformation characteristics of the coal seam and then affect gas extraction and gas disaster prevention. However, there is still a lack of mechanical properties of coal rock with structural anisotropy influenced by bedding structures. In this study, numerical models were established by using the particle flow code method to simulate coal specimens containing bedding with varying inclination angles. The results demonstrate the impact of the bedding inclination angle on the mechanical properties, crack propagation patterns, and the temporal and spatial evolution of the stress field in coal specimens with bedding during the loading process. Furthermore, three crack initiation patterns were investigated for coal specimens with different bedding angles. Additionally, the quantitative relationship between the mechanical properties and the fractal dimension was analyzed. The numerical simulation results were effectively validated through laboratory tests.

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Petrophysical characterization of coal subjected to cyclic N-methylpyrrolidone treatment based on two-dimensional NMR T1-T2

Li,

Guo,

Liu

et al. 2024

Fuel

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Parameter optimization of coal face blasting for coal and gas outburst control

Cited by 4 publications

References 54 publications

Changes in the Microstructure and Wettability of Water-Containing Coal after Hot Flue Gas (CO₂–N₂) Injection

Changes in the Microstructure and Wettability of Water-Containing Coal after Hot Flue Gas (CO₂–N₂) Injection

Cracking Behavior and Stress Field Evolution in Coal Specimens Containing Bedding under Uniaxial Compression

Petrophysical characterization of coal subjected to cyclic N-methylpyrrolidone treatment based on two-dimensional NMR T1-T2

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Parameter optimization of coal face blasting for coal and gas outburst control

Cited by 4 publications

References 54 publications

Changes in the Microstructure and Wettability of Water-Containing Coal after Hot Flue Gas (CO2–N2) Injection

Changes in the Microstructure and Wettability of Water-Containing Coal after Hot Flue Gas (CO2–N2) Injection

Cracking Behavior and Stress Field Evolution in Coal Specimens Containing Bedding under Uniaxial Compression

Petrophysical characterization of coal subjected to cyclic N-methylpyrrolidone treatment based on two-dimensional NMR T1-T2

Contact Info

Product

Resources

About

Changes in the Microstructure and Wettability of Water-Containing Coal after Hot Flue Gas (CO₂–N₂) Injection

Changes in the Microstructure and Wettability of Water-Containing Coal after Hot Flue Gas (CO₂–N₂) Injection