In core logging, each joint set intersects borehole into some segments. In this research, it has been shown that length of the borehole segments created by each
A simulation of stratification and penetration was performed over a range of structural parameters that included screen width, aperture size, inclination angle,
Stability level of tunnels that exist in an underground mine has a great influence on the safety,production and economic performance of mines.Ensuring of stabil
The FLAC3D software was used to simulate and analyze numerically the displacement, stress and plastic zone distribu-tion characteristics of a large span interse
The time evolution of coal structure during low temperature oxidation was investigated by oxidizing coal samples in air at 120 ℃ for periods of up to 14 days.T
Fault fracture zones and water-bearing bodies in front of the driving head are the main disasters in mine laneways,thus it is important to perform their advance
In order to study the time-frequency characteristics of blasting vibration signals, measured in milliseconds, we carried out site blasting vibration tests at an
Mining-induced fracture zone will be produced in the overlying strata after the coal was mined.In this article,the mining-induced deformation of overlying strat