<正> The coal-gas existing condition was ameliorated in the coal seams prone to coal-gas outburst adopting the mining method of protective strata.The gas volume
<正> The size distribution of a muck pile depends not on only the blasting standard but also on the mechanical properties,joint system,and crack density of the
<正> Briefly introduced the simple shear apparatus under high stress that was developed from RMT. A series simple shear tests under high stress show that the re
<正> According to the rock burst features occurred in the coal mass of roadway rib in one mine,the mechanics model of coal mass and roof structure system along
<正> As a good method to solve the problem of high methane on the workface and inthe goaf,drawing coal strata methane through a surface borehole is used.However
<正> There are many problems in terms of safe coal production and the sound developmentof the coal industry.Accompanying the intensification and increasing effi