复杂多机站通风系统反风方案设计及模拟

为解决玲南金矿矿井火灾烟气无序扩散问题，提出了矿井区域性反风技术方案，利用Ventsim软件建立了岭南金矿三维等比例通风网络模型与矿井反风模型，解算了采取反风措施后矿井风量分配及火灾烟气CO分布，同时开展了现场反风试验，验证方案实施效果。研究表明：①玲南金矿进风路线-610 m 2#盲井井口电缆短路火灾发生，采取反转-370 m东风井回风机站风机、停止8#穿脉箕斗井-770 m回风巷风机和-690m 10#穿脉巷风机措施后，经Ventsim模拟解算得出-370 m主回风机站反风量为63.3 m3/s，风机反风效率为60.2%，主要进、回风区域风流反向，火灾烟气CO沿1#竖井排出，火灾烟气按预期方向流动；②分别在1#竖井井底石门附近采场和-370 m东风井主回风机站设置了CO监测点，火灾发生后无反风措施时，-370 m东风井主回风机站CO峰值为2 830.4×10-6，采取反风措施后，火灾下风口作业面无CO，1#竖井井底石门在2 500 s时，CO浓度达到峰值2 914×10-6，在7 500 s时，CO浓度减低至18×10-6，采取反风措施后，CO沿最短路径排出；③现场反风试验测得-370 m中段风机正转总回风量为106.5 m3/s，风机从正转过渡到反转耗时4 min，第10 min时，反风风量为74 m3/s，占正常通风量的69.48%，符合相关规范要求，矿井通风系统抗火灾突变能力得到了显著提高。

Design and Simulation of Anti-wind Air Scheme for Complex Multi-station Ventilation System

In order to solve the problem of disorderly diffusion of flue gas in the Lingnan Gold Mine， a regional mine reversal technology was proposed，based on Ventsim software，three-dimensional equally-proportional ventilation network and mine anti-wind model were established，and mine air volume distribution and fire smoke CO distribution under taking anti-wind measures were calculated.The on-site anti-wind test was designed to verify the implementation effects of anti-wind technical scheme.The study results showed that:①The air inlet route of Lingnan Gold Mine -610 m 2# blind shaft wellhead cable short-circuit fire occurred，after taking the measures of -370 m return fan station fan reversing of east air shaft，stopping the 8# pulse through skip well -770 m return air lane fan and -690 m 10# pulse through lane fan，through Ventsim software calculation，the reverse air volume of the -370 m main return fan station was 63.3 m3/s， and the fan reverse wind efficiency 60.2%.Main inlet and return air area wind reverse，fire smoke CO was discharged along 1# shaft， and fire smoke flowed in the expected direction.②CO detection points were set in the stope near stone door at the bottom of 1# shaft and the main return fan station of -370 m east air shaft.After the fire happened， the peak value of CO in the main return fan station of -370 m east air shaft is 2 830.4×10-6 without anti-wind measures；after taking anti-wind measures， there was no CO on the operating surface of the fire outlet.At the bottom of 1# shaft， the CO concentration reached a peak of 2 914 ×10-6 at 2 500 s， and decreased to 18×10-6 at 7 500 s.After anti-wind measures were taken，CO was discharged along the shortest path.③Field reverse wind test results showed that the total positive return air volume of the -370 m fan in the middle section was 106.5 m3/s，it took 4 minutes for the fan to transition from positive to reverse.Ten minutes later， the back air volume was 74 m3/s， accounting for 69.48% of the normal ventilation volume，which met the requirements of related specifications，the ability of mine ventilation system to resist fire catastrophe was significantly improved.