避难硐室压风供氧系统压风量研究

Research on Air Supply to Refuge Chamber

分析避难硐室内人员生存环境主要参数变化情况,研究其压风供氧系统人均所需压风量。根据硐室内压风与人员呼吸CO2间关系,绘制硐室内空气中CO2体积分数随时间变化曲线,得出CO2体积分数稳定值与压风量的关系。通过分析CO2稀释方程、热量平衡、湿度平衡和O2平衡,确定人均压风量为100 L/min。在常村煤矿避难硐室进行80人16 h压风供氧生存试验,结果表明:压风量100 L/min能够满足硐室内人员呼吸需要,硐室内各环境参数均在国家标准要求范围内,温度的迅速稳定表明硐室周围岩体的导热性良好。

The living space in a refuge chamber was analyzed. Air supply per capita was discussed. For the refuge chamber with occupants , a curve of CO2 volume fractions in air versus time was plotted. A relationship between the stablized value of CO2 volume fraction and air supply was found. On the basis of analysis of C02 dilution equation , heat balance , humidity equilibrium and O2 balance , an air supply per capita of 100 L/min was obtained. A living space experiment carried out in the Changcum mine demonstrated that the air supply per capita of 100 L/min can satisfy the occupants＇demand to breathe.