<正> In order to improve the thermal environment of high-temperature heading face,moisture content of supply air is reduced by dehumidification, and the relativ
<正> A study of the characteristics of the accumulative rock failure and its evolution byapplication of the group renormalization method were presented. In addi
<正> Based on the damage analysis of elliptical aperture,the mechanism of coal damagein the developing process of coal and gas outburst was researched.The resul
<正>Separation density is one of the most concerned operating parameters in gravity beneficiation.Although equal-errors cut point or distribution density is usu