深井自然风压变化规律及重点影响区域研究

Study on Changing Laws and Key Affected Area of Natural Wind Pressure of Deep Mine

为保障深水平矿井自然风压的有效控制和利用,采用现场实测与模拟的方法,以梁宝寺二号井为例,对深井自然风压变化规律进行研究,同时采用定性与定量分析相结合的方法对自然风压重点影响区域进行判定。研究表明:深水平矿井自然风压全年变化规律形如正弦曲线,且与机械通风作用方向相同,夏季达到最小值,冬季达到最大值;1 d中自然风压值变化不大,对通风系统产生的影响也较小;在自然风压作用的分支风路中,机械动力消耗较小的分支对自然风压的敏感度高,风流稳定性差,自然风压重点影响区域主要分布在以主副井、风井为中心的邻近区域。

To control and utilize the natural wind pressure of deep mine effectively,site measurement and simulation is used to study changing laws of natural wind pressure of Liangbaosi No. 2 Coal Mine,meanwhile,the main affected area of natural wind pressure is determined through combination of qualitative and quantitative analysis. The results show that annual variation shaped of natural wind pressure of deep mine like a sine curve,which reaches maximum in winter and minimum in summer and the wind caused by natural wind pressure is consistent with mechanical ventilation. Natural wind pressure changes little during a day and the influence on ventilation system can be ignored. Among branches in response to natural wind pressure,the smaller consumption of mechanical power,the sensitivity of the branch is higher and stability of wind is poor. The mainly affected area of natural wind pressure distribute in neighboring region around the main and auxiliary shaft and air shaft.