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The interface barrier formation mechanism of micro-cracks of coal and rock mass is investigated by using theoretical analysis and piezoelectric experiments. It is found that the micro-cracks of coal or rock expand constantly under external loads, while the slip, dislocations and inhomogeneous deformation of crack interface and lattice cause charge breakthrough, and then, barrier form on the crystal...
Instability of theory of flow fixation coupling is proposed based on the mechanism of interaction between coal solid deformation and infiltration of gas in coal. This is, coal and gas outburst is a rapid and sudden local failure of gaseous coal resulted from mining. The three main factors are: stress, gas and coal quality. A mathematical model for flow fixation coupling for coal and gas outburst...
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