FIELD: mining.
SUBSTANCE: method consists in collection of data related to depth of mining operations h, length of working face LE of the value of excavated stope ℓ with falling angle α and its capacity m, rate of working face advance ν, weighted average coefficient of coal strength f, stresses in an untouched massif σ0 and on the face line σз, primary ξpr and secondary ξ0 steps of roof collapse, strength limit of rocks for simple compression σ com, rheological parameter α, reduced time t, coefficient of concentration of stresses K and distance from the face to maximum pressure Xav. Specified data is substituted into a mathematical formula, if any of the specified data is produced by calculations. Using the value of outburst hazard value, working face outburst hazard is decided.
EFFECT: higher efficiency of prediction due to selection of technical parameters that most accurately characterise conditions for uncoupling of a spontaneous outburst of coal and gas.
3 cl, 1 dwg
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