上海梅山冶金公司铁矿矿体厚大，井下各种井巷纵横交错，通风系统极其复杂，原采用大主扇通风，存在对风流控制能力差，风机效率低，井下有效风量率低等缺点。多级机站通风采用最小负压通风，均比压力梯度、控制漏风、风量调控等原理；采用系统优化．无风墙机站通风，抗冲击风 Shanghai Meishan Metallurgical Company has an iron ore body with a large thickness. All kinds of underground shafts are arranged in a crisscross pattern. The ventilation system is extremely complicated. The original main fan is used for ventilation. This has the disadvantages of poor control of airflow, low fan efficiency and low effective air volume rate. Multi-level station ventilation with minimum negative pressure ventilation, than the pressure gradient, control air leakage, air flow control and other principles; the use of system optimization. Wind-free machine station ventilation, impact wind