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矿山井巷的密闭墙是切断风流,防止风流短路,漏风和烟尘蔓延的井下通风构筑物。密闭墙的严密程度对通风系统的稳定性、可靠性和合理性有很大的影响。衡量密闭墙严密程度的重要指标是它的漏风量,即单位时间内通过密闭墙漏失的风量米~3/秒或米~3/分。量测密闭墙漏风量,往往因风速太低读不出准确的数值,误差比较大而得不到精确的结果,至今还没有一个较完善的方法。
The confined wall of the mine shaft is the underground ventilation structure that cuts off the flow of wind and prevents the short circuit of the wind flow, the leakage of air and the spread of smoke and dust. The tightness of the closed wall has a great influence on the stability, reliability and rationality of the ventilation system. An important indicator of the tightness of a confined-wall is its amount of air leakage, which is the amount of air lost through the confined wall within a unit of time of 3 m-3 / m or 3 m-3. Measuring closed wall air leakage, often because of the wind speed is too low can not read the exact value, the error is relatively large and not accurate results, so far there is no more perfect method.