地下洞室开挖压出式通风风量计算

Air Quantity Calculation for Forced-out Type Ventilation in Excavation of Underground Caverns

地下洞室开挖通风方式通常采用压入式、抽出式和混合式。文章提出一种新的布置方式,即压出式。对压出式通风的排烟过程作了一些探讨性的研究,并根据试验测定结果推导出压出式通风的风量计算公式,与沃罗宁理论推导的抽出式风量计算式是一致的,只是压出式公式多考虑了压出通风系统漏风率的影响,这与实际情况是一致的。

Three types of ventilation have usually been used for excavation of underground cavems, i.e. forced - in ventilation, exhausted ventilation and mixed ventilation. This paper has presented a new type of ventilation, namely, forced - out ventilation. An exploratory study has been made on smoke discharging process for the forced - out ventilation, and a formula for air quantity calculation for forced - out ventilation has been derived from the test results, which is consistent with that for exhausting ventilation derived using the Voronin theory. The only difference between them is that the former has taken into consideration the rate of air leakage of the forced - out ventilation system, which conforms with the actual condition.