Results 1 to 10 of about 1,774,538 (199)
Experimental and analytical investigation on the coupled elastoplastic damage model of coal-rock
Fracture and Structural Integrity, 2020 In this paper, a novel coupled elastoplastic damage model for coal-rock is proposed to predict the deformation and potential disaster in coal mining. The conditions of small deformation and thermodynamic potential are considered, as well as the coupling ...
Yundong Shou +2 more
doaj +4 more sources
Damage‐induced permeability model of coal and its application to gas predrainage in combination of soft coal and hard coal [PDF]
Energy Science and Engineering, 2019 AbstractCoal permeability is a key parameter that affects the drainage of coal bed methane (CBM). Owing to the lower original permeability of coal seams in China, more attention was paid to the study of damage‐induced permeability laws. However, the theory of damage‐induced permeability still needs to be improved.
Yongliang Zhang
exaly +3 more sources
Investigation on the long-term damage evolution of a strip coal pillar
Scientific ReportsThe long-term stability of water-immersed coal pillars in proximity to urban areas is critical for ensuring the safety of urban development. This study investigates the creep damage evolution in strip coal pillars through a comprehensive approach ...
Xueliang Li +5 more
doaj +4 more sources
Meitan kexue jishu, 2023 Water-rock interaction is common seen in underground mining engineering activities. In order to study the mechanical properties, damage characteristics and deterioration mechanism of coal-rock combined samples under water-rock interaction, axial ...
Guangbo CHEN +5 more
doaj +1 more source
Experimental Study on Coal Permeability and Damage Evolution Under the Seepage-Stress Coupling
Frontiers in Earth Science, 2022 In order to study the damage evolution law of coal under the seepage-stress coupling, this paper adopted the rock servo triaxial test system to conduct permeability test for full stress-strain process on 10 sets of coal specimens using steady-state ...
Fujin Lin +5 more
doaj +1 more source
Study on periodic stress bearing characteristics of water-immersed coal body
Meikuang Anquan, 2023 For the long-term progressive damage of the coal pillar dam body of the underground reservoir under the action of water immersion-periodic stress, taking a mine in Shaanxi Province as the engineering background of the underground reservoir project, the ...
LIU Xiaofei, XUE Zongjian, NIU Tengchong
doaj +1 more source
Meitan xuebao, 2023 Currently the law of heat and mass transfer and the analysis of coal damage in the process of injecting low-temperature liquid nitrogen (LN2) into the borehole of coal seam are the key problems to be solved urgently for the application of LN2 in the ...
Yuzhou CONG +7 more
doaj +1 more source
Study on creep failure of coal specimen subjected to step loading
Meikuang Anquan, 2021 In order to further study the energy evolution and damage failure of coal specimen subjected to step creep loading, the Shimadzu AX-G250 test machine was used to carry out the creep test of coal specimen subjected to step loading. Test results show that
DUAN Huiqiang
doaj +1 more source
Applied Sciences, 2021 To study the damage and destruction behavior of small coal pillars in coal mine roadway driving along gobs under long-term in-situ stress and multiple engineering disturbances, an unconfined compression experiment under a discontinuous cyclic load was ...
Zhe Xiang +3 more
doaj +1 more source
Experimental study on damage characteristics and energy evolution of coal by ultrasonic power
Meitan kexue jishu, 2023 In order to study the mechanical damage characteristics and energy evolution law of coal after ultrasonic fracturing, uniaxial compression experiments were carried out on fractured coal with different power by using electronic universal pressure testing ...
LI Shugang +6 more
doaj +1 more source