Results 71 to 80 of about 7,021 (250)

Dynamic prediction of coal and gas outburst risk based on quantitative analysis of stress–energy evolution and adaptive correction

Deep Underground Science and Engineering, EarlyView.
This study quantitatively analyzed the spatiotemporal evolution of stress redistribution ahead of the working face by integrating coal seam distribution, tectonic stress anomalies, gas pressure, and mining‐induced disturbances. An R‐value criterion for coal and gas outburst (CGO) risk assessment was established based on energy principles.
Yingjie Zhao, Xueqiu He, Dazhao Song, Liming Qiu, Minggong Guo, Jie Liu, Qiang Liu, Yi Zhu   +7 more
wiley   +1 more source

Development Status and Trends of Coal and Gas Outburst Prediction and Early Warning Technologies in China Over the Past Decade

Mathematical Modeling and Algorithm Application
Coal and gas outburst is a major disaster in coal mining, posing a severe threat to the life safety of miners and coal mine production. Over the past decade, China has made remarkable progress in the field of coal and gas outburst prediction and early ...
Yi Zhang
semanticscholar   +1 more source

Distribution Characteristics of Gas Outburst Coal Body in Pingdingshan Tenth Coal Mine [PDF]

, 2012
Coal and gas outburst is closely related to geographic structure which controls the preservation of the coal seam gas, the cracked degree and the thickness distribution of coal deformation and the occurring of coal and gas outburst.
Wei, Wang, Jiangwei, Yan, Zhihong, Tan
core   +1 more source

Real‐time multiscale characterization of water migration in deep coal under stepwise pressure‐increasing injection: Combined low‐field nuclear magnetic resonance and multifractal approach

Deep Underground Science and Engineering, EarlyView.
The graphical abstract illustrates the real‐time multiscale characterization of water migration in deep coal under stepwise pressure‐increasing injection. Under in‐situ hydrostatic pressure, the water invasion front advances progressively along the axial direction as the injection pressure increases stepwise, tracked in real time by nuclear magnetic ...
Lei Song, Hongwei Zhou, Zelin Liu, Yimeng Wang, Xiaohai Zhang, Mingyuan Lu, Yang Ju   +6 more
wiley   +1 more source

Development of data acquisition instrument for coal and gas outburst based on wireless communication

, 2022
Aiming at the problem of long measuring time and low efficiency of K1 value measuring instrument for drilling cuttings gas desorption index used in coal mine at present, based on the related requirements of prevention and control of coal and gas outburst
WANG Yanbin
core   +1 more source

Research on Crack Propagation and Stress Propagation in Coal‐Rock Combinations Under Different In Situ Stresses Subjected to Blasting Loads

Energy Science &Engineering, EarlyView.
A stress wave propagation model for coal‐rock combinations under in situ stress was established. Taking a coal mine in Huainan, China as the engineering background, isotropic and anisotropic numerical models were constructed. Field engineering practices were carried out to verify the reliability of the conclusions.
Jianyu Zhang, Guangming Chen, Meiyao Li, Xinyu Wang, Yuting Liu, Renjie Cui, Yixin Gong   +6 more
wiley   +1 more source

Mechanism of coal and gas outburst induced by excavation working face approaching tectonic coal area

Chinese Journal of Rock Mechanics and Engineering
: In deep coal seams where intact coal interbeds with tectonic coal, the advancement of excavation working faces towards tectonic coal zones, under in-situ stress and gas pressure, is highly susceptible to induced coal and gas outbursts.
Jupeng Tang, Wen-Zhe Huang, Yi-Shan Pan, Lingran Ren, Xin Zhang, Lei Huang   +5 more
semanticscholar   +1 more source

Discrete and Modal Early Warning of Coal and Gas Outburst Based on Time Series of Gas Emission

, 2020
In order to realize the dynamic and real-time early warning of coal and gas outburst danger in working face, a discrete modal early warning method based on time series of gas emission is proposed.
LU Xinming, ZHANG Tianyu, WANG Yong, TU Hui, WANG Hongjuan
core   +1 more source

Advanced fine detection technology of coal and gas outburst danger area

, 2022
According to the geological structure and environmental characteristics of coal and gas outburst and the shortcomings of existing outburst prediction index system, the borehole radar is used to carry out the advanced and fine detection of gas geological ...
ZHANG Huijie, CHEN Xiaojun, ZHU Nannan, SHU Longyong   +3 more
core   +1 more source

Experimental study on the influence of initial desorbed gas from crushed coal on the dynamic effects of coal and gas outburst

Meitan xuebao
A large amount of gas rapidly released during coal and gas outburst is an important cause of dynamic effects such as outburst shock waves and coal-gas two-phase flow.
Jie CAO, Qianting HU, Xusheng ZHAO, Haitao SUN, Linchao DAI   +4 more
doaj   +1 more source