| 摘要 |
The invention relates to a method for a priori solving a ventilation network affected by an explosion, based on determining the distribution of air flow-rates at the level of a ventilation network, after an explosion. According to the invention, the method consists in that the ventilation network is firstly solved and the operation parameters are established under usual working conditions, while determining the explosion-prone zones, after which the radial pressure loss on the leading line of mining works as compared with the epicenter is established in order to determine the area of the affected ventilation network by comparing the explosion pressure at the level of one branch with the minimum pressure required for the ventilation facilities to be destroyed, after which the total resistance of the ventilation facilities is re-calculated to determine the operation parameters, the depression developed and the flow-rate circulated at the level of the main ventilation station after an explosion, followed by the elimination of the ventilation facilities from the ventilation network as modelled and solved under usual working conditions while introducing the operating parameters of the active ventilator post-explosion, which solves the ventilation network in the new conditions to obtain the distribution of air flow rates at the branch level, this method being applicable to any type of underground mining works which produce useful mineral substances and exhibit the risk of explosive mixture formation. |
