Results 61 to 70 of about 2,860,465 (220)

Dynamic cracking properties and generating conditions of coal under rapid gas release

Deep Underground Science and Engineering, EarlyView.
Gas release tests revealed that crack initiation and propagation are jointly controlled by initial crack length, residual strength, and gas release velocity. A new outburst risk coefficient was thus developed from a fracture mechanics perspective, offering a novel predictive approach.
Bing Zhang, Hanpeng Wang, Liang Yuan, Guofeng Yu, Wei Wang, Benliang Chen, Bo Ren   +6 more
wiley   +1 more source

Advances in vital‐sign prediction and early‐warning models for underground coal mine workers integrating environmental factors

Deep Underground Science and Engineering, EarlyView.
This review synthesizes advances in predicting miners' vital signs by integrating environmental monitoring (dust, temperature, and gas) with physiological data. It highlights multi‐source data fusion techniques and early‐warning models for enhanced occupational safety in underground coal mines.
Junji Zhu, Dawei Cui, Yingjie Liu, Yuntao Liang, Yue Zhang   +4 more
wiley   +1 more source

Characteristics of coal-measure source rock and gas accumulation belts in marine-continental transitional facies fault basins: A case study of the Oligocene deposits in the Qiongdongnan Basin located in the northern region of the South China Sea

Energy Exploration & Exploitation, 2019
This study carried out the development and distribution prediction research on coal-formed gas accumulation belts from the perspectives of the development and distribution of the coal measure source rock and the thermal evolution degrees of those rock ...
Zhang Gongcheng, Wang Dongdong, Zeng Qingbo, Yang Haizhang, Li Zengxue, Zhao Zhao, Guo Shuai   +6 more
doaj   +1 more source

Carbon emission assessment of tunnel infrastructures: From construction to operation

Deep Underground Science and Engineering, EarlyView.
This study develops a lifecycle carbon accounting framework for tunnel infrastructures, covering design, construction, operation, maintenance, and dismantling. Applied to a subsea tunnel case, the framework reveals the carbon emission distribution among four typical tunnel types and highlights potential carbon offset methods for low‐carbon tunnel ...
Luyuan Long, Wout Broere, Xuehui Zhang, Tian Xia, Richard de Nijs   +4 more
wiley   +1 more source

Analysis on characteristics of coal-rock gas dynamic disasters based on stress grading action mechanism [PDF]

With the gradual depletion of shallow coal resources, coal mining in China gradually extends to the deep. With the increase of buried depth, the stress state will change and the type of stress field will also change, which makes the internal stress ...
Jie ZANG, Wei ZHAO, Xiongfei PEI, Zexin LI, Dan ZHAO, Aitao ZHOU   +5 more
core   +1 more source

Multi-indicator precursor warning method for gas-bearing coal rock fracture based on charge signals

Meitan kexue jishu
To address the challenge of accurate precursor charge signal warning for gas-bearing coal rock dynamic disasters, a comprehensive warning method based on multi-indicator charge signals for gas-bearing coal rock failure is proposed.
Xiaochun XIAO, Xin MA, Xin DING, Yufeng FAN, Wenping ZHANG   +4 more
doaj   +1 more source

Experimental and smoothed particle hydrodynamics‐finite element method simulation investigation of synergistic erosion mechanism of gangue‐based abrasive water jets

Deep Underground Science and Engineering, EarlyView.
This study proposes an eco‐friendly coal permeability enhancement technique by utilizing mine waste gangue as an abrasive in high‐pressure water jets. Integrating erosion experiments with smoothed particle hydrodynamics‐finite element method coupled simulations, the research study elucidates the flow field dynamics and a nonlinear solid–liquid ...
Qingxiang Wang, Jiaxu Tang, Qiheng Ren, Ding Wang, Tong Wang   +4 more
wiley   +1 more source

Coal mine rock burst and coal and gas outburst image perception alarm method based on depth characteristics [PDF]

Rock burst and coal and gas outburst are easy to cause serious accidents in coal mines. In view of the current coal mine rock burst and coal and gas outburst accidents occurring by manual discovery, combined with the color and depth characteristics of ...
Jijie CHENG, Yi LIU
core   +1 more source

Thermodynamic model for swelling of unconfined coal due to adsorption of mixed gases [PDF]

, 2015
Permeability evolution in coal seams during CO2-Enhanced Coalbed Methane (ECBM) production is strongly influenced by swelling/shrinkage effects related to sorption and desorption of both CO2 and CH4.
Spiers, C.J., Zhou, Hongwei, Peach, C.J., Liu, J., CSC: Creating transport paths in coal seams: the key to methane production and CO2 storage by (E)CBM, Experimental rock deformation   +5 more
core   +2 more sources

Multi‐factor coupling effects in hydraulic fracturing of laminated shale: Experimental insights and physics‐informed neural network‐driven optimization

Deep Underground Science and Engineering, EarlyView.
This study establishes a multi‐factor coupling framework for predicting breakdown pressure in laminated shale by integrating experimental hydraulic fracturing tests, physics‐informed neural networks (PINNs), and Sobol sensitivity analysis. It reveals how differential stress, the bedding dip angle, and the injection rate interact to influence fracture ...
Tao Wang, Guoyao Xu, Liyuan Liu, Yao Zhang, Sitao Zhu, Hongyang Chu, Kaikai Zhao   +6 more
wiley   +1 more source