Dynamic disasters such as coal and gas outburst seriously restrict the safety of mine production. Different types of coal particles reflect the coal structure. mechanical characteristics and energy storage behavior under load. which is of great significance to the study of coal and gas outburst disasters. https://www.ealisboa.com/limited-price-Nimbus-Cloud-Polycotton-Double-Bedsheet-Jubilance-By-Welspun-big-savings/