The volumetric changes in the coal matrix (Coal Shrinkage), permeability under various gas environment conditions as well as perographical properties were studied in the laboratory. The shrinkage and permeability of coal were examined with respect to changing gas type and confining pressures. The shrinkage tests were carried out in high-pressure bombs while the permeability study was conducted ...

the volumetric changes in the coal matrix (coal shrinkage), permeability under various gas environment conditions as well as perographical properties were studied in the laboratory. the shrinkage and permeability of coal were examined with respect to changing gas type and confining pressures. the shrinkage tests were carried out in high-pressure bombs while the permeability study was conducted ...

A rockbolt acting in the rock mass is subjected to combined action of pull-out load and confining pressure, bond quality directly affects stability roadway cavern. Therefore, this study, pressure are applied grouted systems with defects by a numerical simulation method, detected ultrasonic guided waves study propagation law defective rockbolts under pressure. The results show that length locati...

The levitated dipole configuration is an innovative concept for fusion research. One of the main advantages of the dipole configuration is the possibility of stably confining high plasma pressure compared to the magnetic pressure, that is, the possibility of achieving high where is the ratio between plasma pressure and magnetic pressure . The present work investigates the limit on equilibrium e...

The levitated dipole configuration is an innovative concept for fusion research. One of the main advantages of the dipole configuration is the possibility of stably confining high plasma pressure compared to the magnetic pressure, that is the possibility of achieving high βs (where β is the ratio between plasma pressure and magnetic pressure). The present work investigates the limit on equilibr...

An economic magnetic fusion reactor favours a high ratio of plasma kinetic pressure to magnetic pressure in a well-confined, hot plasma with low thermal losses across the confining magnetic field. Field-reversed configuration (FRC) plasmas are potentially attractive as a reactor concept, achieving high plasma pressure in a simple axisymmetric geometry. Here, we show that FRC plasmas have unique...

Abstract Permanent deformation in the form of rutting is a critical mode failure observed flexible pavements. While several research have been conducted to develop multiple tests for characterisation permanent deformation, little information obtainable from existing literature on how factors or interaction these affect behaviour simulative test, such as wheel tracker. This focuses statistical a...

The deformation and failure of underground engineering are usually caused by unloading. In this work, triaxial unloading confining pressure tests carried out to simulate the process rock mass unloading, analyze crack-characteristic stress, study energy evolution under pre-peak post-peak characteristics combined with theory. results show that, when increases from 5 MPa 20 MPa, crack closure stre...