浅埋藏煤层火区下开采均压防灭火技术研究

摘要

为了解决元宝湾煤矿浅埋藏煤层火区下开采采空区自然发火有毒有害气体涌出和回风隅角低氧问题,提出了风机-风窗联合均压防灭火技术,测定6105工作面在额定风量1200m3/min时的通风阻力约194~202Pa,采用2组4台2×45kW局部通风机 (两用两备) 向工作面供风,通过减小调节风窗面积来提高工作面压力.结果表明:6105工作面均压防灭火系统启动后,工作面风量为1220m3/min时,通过风窗调节,地表至6105工作面的通风阻力降为0Pa,处于平衡状态,回风隅角CH4, CO气体浓度均为0, O2和CO2气体均维持在安全浓度范围之内,证明均压系统起到了较好的效果.%In order to solve the problems that gob spontaneous combustion hazardous gas emission and hypoxia in return airway corner, which mining under fire area in shallow of Yuanbaowan coal mine, and then ventilator-windscreen unite voltage sharing fire preventing and extinguishing technology was put forward, ventilation resistance was about 194~202Pa of 6105 working face as nominal air deliv-ery was 1200m3/min, so two groups four local fans were used to ventilation to working face, working face pressure was improved ac-cording decreased adjust wind screen area.The results showed that voltage sharing fire preventing and extinguishing system booting in 6105 working face, when working face air volume was 1220m3/min, ventilation resistance from surface to 6105 working face decreased to 0MPa by adjusting wind screen, it was in equilibrium state, CH4, CO density in air return corner all was 0, O2and CO2were all within safety density scope, it proved the results was good.