Energy dissimilation characteristics and shock mechanism of coal-rock mass induced in steeply-inclined mining: comparison based on physical simulation and numerical calculation

Xu, Huicong; Lai, Xingping; Shan, Pengfei; Yang, Yanbin; Zhang, Shuai; Yan, Baoxu; Zhang, Yun; Zhang, Nan

doi:10.1007/s11440-022-01617-2

Cited by 47 publications

(14 citation statements)

References 14 publications

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“…The strain caused by CBM pressure, the unidirectional linear moisture strain, the strain caused by effective stress, and the strain due to adsorption and desorption can be expressed as follows ε p = prefix− 1 K normalm ( p̅ − p̅ 0 ) ε M = β M ( s w − s w 0 ) ε σ = 1 2 G ( σ normale normalf normalf − υ 1 + υ σ υ normale normalf normalf ) ε s = α s g V s g = α s g V L p p + p L exp [ − c 2 1 + c 1 p false( T − T t false) ] where K m is the bulk modulus of the coal matrix, β M is the coefficient of moisture expansion; α sg is the volumetric strain coefficient induced by adsorption and desorption, kg/m 3 ; V sg is the adsorbed CBM content, m 3 /kg; c 1 is the pressure coefficient, MPa –1 ; c 2 is the temperature coefficient, K –1 ; V L is the Langevin volume constant, m 3 ·kg –1 ; p L is the Langevin pressure constant, Pa; T is the coalbed temperature, K; T t is the re...…”

Section: Methane-containing Coal Fluid–solid Coupling Modelmentioning

confidence: 99%

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Fluid–Solid Coupling Characteristics of Methane-Containing Coal during Borehole Extraction of Coalbed: Numerical Modeling and Experimental Research

Yan,

Wen,

Jin

et al. 2023

ACS Omega

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The control and utilization of coalbed methane (CBM) are crucial for ensuring the safety of coal mining operations and mitigating greenhouse gas emissions. Predrainage of CBM from boreholes plays a pivotal role in preventing CBM accidents, harnessing CBM energy resources, and reducing greenhouse gas emissions. To better understand the evolution of key parameters during the predrainage process of CBM boreholes, this study, based on fundamental assumptions of coupling models, integrates the theories of elasticity, seepage mechanics, and fluid mechanics. It establishes a comprehensive mathematical model that reveals the interrelationships among the stress field, deformation field, and seepage field within methane-containing coal systems. By comparing numerical solutions with analytical solutions and conducting physical similarity simulation experiments, the study demonstrates the correctness of the methane-containing coal fluid–solid coupling model. The model developed in this study represents an improvement over traditional methane-containing coal seepage theories and fluid–solid coupling model theories and can be widely applied in the prevention of coal and CBM outbursts as well as CBM extraction.

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Section: Methane-containing Coal Fluid–solid Coupling Modelmentioning

confidence: 99%

Section: Stress Field Governing Equationmentioning

confidence: 99%

Fluid–Solid Coupling Characteristics of Methane-Containing Coal during Borehole Extraction of Coalbed: Numerical Modeling and Experimental Research

Yan,

Wen,

Jin

et al. 2023

ACS Omega

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“…Domestic enterprises should weigh up the difference between the cost of carbon emission rights and the cost of energy substitution, and find the best way to save energy and reduce emissions. Coal accounts for 29.2% of global primary energy consumption, and the total domestic coal consumption accounts for 64% of China’s energy consumption [ 40 ]. Coal has always been in the leading position in China’s energy consumption structure in the past few decades.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Effect Mechanism Research of Carbon Price Drivers in China—A Case Study of Shenzhen

Chen

Zhang

2022

IJERPH

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Revealing the effect mechanism of carbon price drivers is the basis to establish the pricing mechanism of carbon emission exchange, which also promotes the development of the carbon emission exchange market and can reduce the investment risk. Based on the previous research, the cointegration test, Granger causality test, and ridge regression estimate are used to analyze the effect mechanism between the domestic carbon price and its drivers. Johansen’s cointegration analysis reveals that there is a long-term equilibrium relationship between the domestic carbon price and energy price, industrial development level, climate change, and financial prosperity. Ridge regression estimates reveal that the international spot price of thermal coal in the ARA port and the spot price of Brent crude oil in Britain are negatively correlated with the domestic carbon price, while CER futures price is positively correlated with the domestic carbon price. There is a linkage between the international carbon price and the domestic carbon price. Since 2017, the domestic carbon price has been lower than the equilibrium value, and the value of carbon emission rights has been underestimated. With the continuous improvement of the domestic carbon market, the carbon price will rise and fluctuate around the equilibrium price in the future.

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“…At the same time, the state of the coal rock is closely related to the safety of the underground construction [1][2][3]. By studying the strength characteristics and deformation characteristics of coal rock under confining pressure, this paper informs understanding of the mechanism of occurrence of coal rock disasters [4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Research on the Response Mechanism of Coal Rock Mass under Stress and Pressure

Shan

Lai

et al. 2023

Materials

Self Cite

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In this paper, the strength and deformation failure characteristics of bearing coal rock mass are related to the confining pressure, and the SAS-2000 experimental system is used to carry out uniaxial and 3, 6, and 9 MPa triaxial tests on coal rock to assess the strength and deformation failure characteristics of coal rock under different confining pressure conditions. The results show that the stress–strain curve of coal rock undergoes four evolutionary stages after fracture: compaction, elasticity, plasticity, and rupture. With confining pressure, the peak strength of coal rock increases, and the elastic modulus increases nonlinearly. The coal sample changes more with confining pressure, and the elastic modulus is generally smaller than that of fine sandstone. The stage of evolution under confining pressure constitutes the failure process of coal rock, with the stress of different evolution stages causing various degrees of damage to coal rock. In the initial compaction stage, the unique pore structure of the coal sample makes the confining pressure effect more apparent; the confining pressure makes the bearing capacity of the coal rock plastic stage stronger, the residual strength of the coal sample has a linear relationship with the confining pressure, and the residual strength of the fine sandstone has a nonlinear relationship with the confining pressure. Changing the confining pressure state will cause the two kinds of coal rock samples to change from brittle failure to plastic failure. Different coal rocks under uniaxial compression experience more brittle failure, and the overall degree of crushing is higher. The coal sample in the triaxial state experiences predominantly ductile fracture. The whole is relatively complete after failure as a shear failure occurs. The fine sandstone specimen experiences brittle failure. The degree of failure is low, and the confining pressure’s effect on the coal sample is obvious.

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Energy dissimilation characteristics and shock mechanism of coal-rock mass induced in steeply-inclined mining: comparison based on physical simulation and numerical calculation

Cited by 47 publications

References 14 publications

Fluid–Solid Coupling Characteristics of Methane-Containing Coal during Borehole Extraction of Coalbed: Numerical Modeling and Experimental Research

Fluid–Solid Coupling Characteristics of Methane-Containing Coal during Borehole Extraction of Coalbed: Numerical Modeling and Experimental Research

Effect Mechanism Research of Carbon Price Drivers in China—A Case Study of Shenzhen

Research on the Response Mechanism of Coal Rock Mass under Stress and Pressure

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