The quality of Yi'an gas coal before and after low temperature upgrading under either a N 2 or H 2 atmosphere was examined by thermogravimetric and infrared
Blasting and breaking of hard roof are main inducing causes of rock bursts in coal mines with danger of rock burst,and it is important to find out the frequency
The coal industry in China has been moving from the semiarid eastern to the drier western regions since the beginning of this century.Water protection is of the
Gas products from the process of coal oxidization and spontaneous combustion have been studied at different temperatures with FTI spectroscopic tests. With temp