【摘要】 某钨矿开采了70多年，上部中段老窿、空区与地表连通较多，回风井巷漏风严重。导致289 m主平硐在高温季节反风，生产中段风量不足，作业环境恶劣。采用“凹”型立体隔离方案将上部采空区与生产中段形成立体隔离，以解决289 m主平硐反风问题。针对生产中段风量不足，结合深部扩建工程通风需要，建立矿山整体通风系统。提出3种通风方案并进行了对比，优化了单翼对角抽出式通风系统。全矿生产总需风量为55 m~3/s，矿井风机主扇型号为DK-6-No.18，安装在–110 m中段总回风巷。利用Ventsim对矿井通风系统进行了模拟研究，结果表明，服务目前生产中段，全矿总风量为58.4 m~3/s；服务深部扩建工程，全矿总风量为59.7 m~3/s。矿山整体通风系统优化方案比原设计方案通风效果更好，并且节省了通风基建投资和运行费用。实践表明“凹”型立体隔离方案能够有效防止289 m主平硐反风问题，对类似主平硐反风的山区矿山具有借鉴意义。更多还原

【Abstract】 A tungsten mine operating for over 70 years exhibited severe air leakage through upper-level abandoned workings and surface-connected cavities, particularly in return air shafts and roadways. This caused air reversal in the 289 m main adit during high-temperature seasons, resulting in insufficient airflow in production levels and hazardous working conditions. To address the air reversal in the 289 m main adit, a ’’concave-shaped’’ three-dimensional isolation scheme was implemented to physically separate upper goaf areas from active production levels. Concurrently, an integrated mine ventilation system was established to resolve airflow deficiencies in production levels while accommodating ventilation demands for deep-level expansion projects. Three ventilation schemes were comparatively analyzed, ultimately optimizing a single-wing diagonal exhaust ventilation system. The total required airflow for mine operations was determined as 55 m~3/s, with a DK-6-No.18 main fan installed in the –110 m level’s main return airway. Ventsim-based simulations demonstrated that the optimized system delivers 58.4 m~3/s total airflow for current production levels and 59.7 m~3/s for deep expansion operations. The revamped ventilation system not only outperforms the original design in airflow efficiency but also reduces both capital investment and operational costs for ventilation infrastructure. Practical application demonstrated the effectiveness of the ’’concave-shaped’’ isolation scheme in preventing air reversal at the 289 m main adit, providing valuable insights for addressing similar ventilation challenges in mountainous mines.更多还原