Open AccessQuantitative Analysis of Factors Affecting Coal and Gas Outburst Based on Energy Model
Author(s) -
Wang Yong,
Qinghe Zhang,
Hui Tu,
Yang Yang
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1533/2/022086
Subject(s) - coal , cohesion (chemistry) , gas pressure , coal gas , overburden pressure , stress (linguistics) , elastic energy , materials science , geotechnical engineering , petroleum engineering , geology , chemistry , physics , thermodynamics , waste management , engineering , linguistics , philosophy , organic chemistry
Ground stress, gas pressure, mechanical properties of coal and other parameters are important factors affecting coal and gas outburst, but the most obvious factor is unclear. In order to reveal the main influencing factors of outburst, this paper established a energy model based on the principle of energy conservation. With the help of MATLAB, the energy contribution of stress, gas pressure and physical and mechanical properties of coal was analyzed. The research shows that the gas expansion can be 2 orders of magnitude higher than the elastic energy of coal, and it is the main energy of coal and gas outburst. The gas pressure directly affects the size of gas expansion energy, it has the greatest contribution to the energy of coal and gas outburst. Stress has little contribution to the energy of coal and gas outburst, but the stress is the controlling factor of the energy release zone, the stress first controls the range of the energy release zone and then affects the release of gas expansion energy. mechanical properties of coal including Modulus of elasticity, Poisson ratio Cohesion, Friction angle etc. has little energy of coal and gas outburst.