The circuit and structure of the equipment on suppression of a dust are proved at explosive works and crushing of rocks. Use in an alternating mode different polarity liquids allows to raise (increase) essentially efficiency suppression of a dust.
The shape of the complete set of the equipment for ventilation deep career by cascade explosion of a fuel -air mix is proved. The complete set of the equipment includes the basic units and elements: capacity of siphon type, a support for accommodation of charges ВВ, devices of management of undermining and the device of the control.
