大佛寺多风井联合运转稳定性实践研究

Practical research on combined operation stability of multi-air shaft in Dafosi Coal Mine

随着煤矿井型和开采范围的不断扩大,采用多风井进风、多风机排风的现代化大型矿井愈来愈多,此时风流结构复杂、矿井通风系统的稳定性对煤矿安全生产具有重要意义。矿井通风系统的稳定性主要取决于主要通风机的台数、相对位置、种类和性能以及自然风压的大小、通风网络的结构形式等。针对大佛寺煤矿同时开采2个煤层,五进三回的通风系统,在对当前状态进行准确解算并构建仿真建模基础上,通过仿真方法进行稳定性与可靠性分析,提出相应的管理和改善建议。针对通风系统3个方面进行分析与评价:通风系统中公共段分析及其阻力占比情况;任意一台主通风机故障后对通风系统的影响;反风时任意一台主通风机故障后对通风系统的影响。根据其严重程度对矿井通风系统加以分类,进而预防、限制和消除不稳定现象,确保矿井通风安全。

With the continuous expansion of coal mine type and mining range,there are more and more modern large-scale mines adopting multi-air shaft intake and multi-fan exhaust air.At this time,the air flow structure is complex and the stability of the mine ventilation system is of great significance to the safe production of coal mines.The stability of the mine ventilation system mainly depends on the number,relative position,type and performance of the main ventilators,the size of the natural wind pressure,and the structural form of the ventilation network.Aiming at the simultaneous mining of two coal seams in the Dafosi Coal Mine,the ventilation system with five inlets and three returns.Based on the accurate solution of the current state and the establishment of simulation modeling,the stability and reliability analysis is carried out by means of simulation,and corresponding management and improvement suggestions are put forward.Aiming at the three aspects of the ventilation system are analyzed and evaluated:Common section analysis and resistance ratio in ventilation system;The influence on the ventilation system after any one main fan fails;The influence on the ventilation system when any one of the main fans fails in the reverse wind.Mine ventilation systems are classified according to their severity,thereby preventing,limiting and eliminating instability,which are necessary to ensure safe production of mine ventilation.