矿山巷道三种机械局部通风方式的评价

在矿山巷道的掘进作业及隧道的导洞开挖等工程中，常采用局部机械通风，常见的通风方式有抽出式、压入式和混合式。这3种通风方式各有其特点，但从降低作业面粉尘浓度的角度尚未定量计算分析，在建立通风模型的基础上进行了数学分析，为选择合理的通风方式，确定合理通风量来确保工作面区域粉尘浓度达标，提供了理论论据。

Assessment on three kinds of local mechanical ventilation in mine tunneling

The local mechanical ventilation is usually used in the construction of mine tunneling,the common ventilation methods are exhaust ventilation,forced ventilation and compound ventilation.These three kinds of ventilation have their own characters.However,the quantitative analysis has not been made from the angle of decreasing dust concentration of the heading face.For selecting the reasonable ventilation methods, determining the reasonable air volume and providing the theory basis, the mathematic analysis has been made on the basis of setting up ventilation models so as to ensure the dust concentration of the heading face to meet the national standard.