Results 81 to 90 of about 3,077,132 (240)

Meso-statistical damage constitutive model and validation of coal under CO2 - load coupling [PDF]

CO2 adsorption causes damage degradation to the coal body and thus reduces its stability, challenging the long-term safety of CO2 sequestration, and it is important to clarify the role of CO2 degradation and establish an ontological model.
Guangxiang XIE, Lei WANG, Shaobo LI, Yu ZHANG, Hao FAN, Lipeng CHEN, Peng ZOU   +6 more
core   +1 more source

Mechanical-permeability characteristics of composite coal rock under different gas pressures and damage prediction model

The Physics of Fluids
Determining the influence of gas pressure on the mechanics, permeability, and energy evolution of gas-bearing composite coal is helpful to better understand the formation process and prevention measures of gasdynamic disasters.
Yangyang Guo, Kai Wang, Feng Du, Haijun Guo, Kangnan Li, Yiqiao Wang   +5 more
semanticscholar   +1 more source

Quantitative characterization of damage characteristics of coal using evaluation parameters considering the spatial structural characteristics of fractures

Scientific Reports
Stable underground tunnels and gas drainage boreholes are important guarantees for safe and efficient coal mining. The stability of these structures is closely related to the mechanical properties of coal and rock damage.
Jin Yan, Xiaoming Ni, Erlei Su, Ruize Niu   +3 more
doaj   +1 more source

Numerical Simulation of Microwave-Induced Cracking of Coal Containing Pyrite Powder Based on a Multi-Field Coupling Model

Applied Sciences
Microwave irradiation has become a potential technical method for coalbed degassing, which can effectively improve its permeability. A coupled electromagnetic—thermomechanical damage (ETMD) model was established to study the damage characteristics of ...
Yidu Hong, Shengyi Long, Xiaowan Sun
doaj   +1 more source

Analysis of surrounding rock damage law of TBM tunneling roadway in coal mine jointed strata

, 2021
In order to research surrounding rocks failure characters and behaviors of TBM tunneling roadway in jointed strata, the paper takes methane drainage roadway of 1413A fully mechanized coal face in Zhangji　Coal Mine as engineering case, the surrounding ...
DAI Mai, TANG Bin, WANG Yong, WANG Xuesong, WANG Zhenhua
core   +1 more source

Stress-damage-flow coupling model and its application to pressure relief coal bed methane in deep coal seam

, 2011
Long-distance pressure relief gas drainage technology has recently been applied in mining areas with multiple coal seams of low permeability in China.
Yu, QX (15554204), Tang, CA (15530036), Yang, TH (15530051), Xu, T (15554198), Hongyuan Liu (14742565), Shi, BM (15554201)   +5 more
core  

Mechanism of Structural Damage in Low Permeability Coal Material of Coalbed Methane Reservoir under Cyclic Cold Loading

Energies, 2020
The pore and fracture structure of coal is the main factor that affects the storage and seepage capacity of coalbed methane. The damage of coal structure can improve the gas permeability of coalbed methane.
Hewan Li, Jianping Zuo, Laigui Wang, Pengfei Li, Xiaowei Xu   +4 more
doaj   +1 more source

Time-lapse change pattern and mechanism of resistivity of coal seam floor mining damage based on inter-hole DC perspective [PDF]

During the coal mining process, the change in the floor stress state of coal seam will produce deformation and failure. The seam floor failure in different coal mining processes has a certain law.
Jianhua YUE, Xiaozhen TENG, Danyang XI, Shuanggui HU, Herui ZHANG   +4 more
core   +1 more source

Numerical simulation of failure of coal and rock blocks under different dynamic loads

, 2021
The numerical simulation of HJC constitutive model is carried out to analyze the dynamic changes of the stress field, strain field and energy field of coal and rock mass under dynamic loading process.
FANG Shuhao, HUO Yujia, GUO Jinlin, BAI Zhipeng, BAO Qingfeng, ZHU Hongqing
core   +1 more source

Unloading damage mechanism and pore structure evolution characteristics of different coal and rocks

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
The final macroscopic fracture of coal rocks is closely related to their internal microscopic structure and micro-defects. The continuous change of the microscopic structure of coal rocks is the main reason for the change of the macroscopic mechanical ...
Wentao Xu, Yunhai Cheng, Wensong Xu, Cheng Pan   +3 more
doaj   +1 more source