Similarity criteria and coal-like material in coal and gas outburst physical simulation

• Published in: International journal of coal science & technology Vol. 5; no. 2; pp. 167 - 178
• Main Authors: Zhao, Bo, Wen, Guangcai, Sun, Haitao, Sun, Dongling, Yang, Huiming, Cao, Jie, Dai, Linchao, Wang, Bo
• Format: Journal Article
• Language: English
• Published: Singapore Springer Singapore 01.06.2018; Springer; Springer Nature B.V; SpringerOpen
• Subjects: Activated carbon; Chemical properties; Coal; Coal and gas outburst; Coal mines; Combustion; Computer simulation; Energy; Fossil Fuels (incl. Carbon Capture); Geotechnical Engineering & Applied Earth Sciences; Methods; Mineral Resources; Physical simulation; Porosity; Research Article; Similar material; Similarity criteria; Simulation; Similar material; Coal and gas outburst; Physical simulation; Similarity criteria
• ISSN: 2095-8293; 2198-7823
• DOI: 10.1007/s40789-018-0203-8

Coal and gas outburst is one of the main gas hazards in coal mines. However, due to the risks of the coal and gas outburst, the field test is difficult to complete. Therefore, an effective approach to studying the mechanism and development of outburst is to conduct the similar physical simulation. However, the similarity criteria and similar materials in outburst are the key factors which restrict the development of physical simulation. To solve those problems, this paper has established similarity criteria base on mechanics model, solid–fluid coupling model and energy model, and presented high similar materials. Combining with three groups of similar number, and considering similar mechanical parameters and deformation and failure regularity, the similarity criteria of outburst is determined on the basis of the energy model. According to those criteria, we put forward a similar material consists of pulverized coal, cement, sand, activated carbon, and water. The similar material has high compressive strength and the accordant characteristics with the raw coal, include density, porosity, adsorption, desorption. The new research is promising for preventing and controlling gas hazards in the future.