Titlebook: Coal Mechanics; Yuanping Cheng,Qingquan Liu,Ting Ren Book 2021 Science Press and Springer Nature Singapore Pte Ltd. 2021 Coal permeability

潜移默化

P. K. Ramachandran Nair,Vimala D. Nairion of coal; Generation of coal seam gas during coal metamorphism, basic composition of coal seam gas, and the existence forms of adsorbed gas and free gas. Controlling effect of magma intrusion on the coal metamorphism and coal seam gas occurrence.

缩短

兴奋过度

https://doi.org/10.1007/978-3-540-69497-7e reservoir of coalbed methane (CBM) resources, the extraction and utilization of coal seam gas resources can realize the significant triple benefits of ensuring the safe mining of coal resources, promoting the clean and efficient use of coalmine gas, and protecting the environment.

URN

GNAW

https://doi.org/10.1007/978-1-4757-6482-6Moisture, ash content, volatiles, density and hardness of coal. Pore, fracture structures of coal and characterization methods. Coal matrix and its scale features

acclimate

synovium

充足

Ekow Otoo,Doron Rotem,Shih-Chiang TsaoMost of the coal seams in China are characterized by high in-situ stress, high gas pressure, high gas content and low permeability, which makes the gas extraction rather difficult. This infrastructure not only limits CBM production but also presents considerable challenges to the safety and efficiency of coal mining in China.

血友病

Ryadh Dahimene,Cedric Du Mouza,Michel SchollCoal and gas outbursts are geological failures that occur in underground drainage or mining, and consist of the ejection of thousands of coal/rock pieces and a considerable amount of gas into a limited working space within a short period.

气候

Basic Physical Properties and Characteristics of Coal Pores and Fractures,Moisture, ash content, volatiles, density and hardness of coal. Pore, fracture structures of coal and characterization methods. Coal matrix and its scale features