By analyzing the mechanism and conditions of goaf spontaneous combustion,aiming at the spontane-ous combustion tendency in 1 122(3)full-mechanized caving mining face that CO concentration overrun within hy-draulic support and temperature rise of goaf,decided to use the comprehensive measures for preventing and extinguis-hing the fire that is use the existing fire-fighting pipe grouting nitrogen injection to goaf,drop the air volume from 2 250 m3/min to below 1 000 m3/min in the face,inject liquid CO2 and nitrogen to goaf.After implemented the com-prehensive measures 15 days observes the effect,CO concentration fell to 10 ×10 -6 ,effectively control the develop-ment of goaf spontaneous combustion,eliminate the hidden danger of spontaneous combustion.%通过分析采空区自燃发火的机理与条件，针对1122（3）综放工作面架档内CO浓度超限问题，阐述了采空区温度升高出现自燃发火倾向的情况，确定运用已有的防灭火管路向采空区灌浆注氮，把工作面供风量从2250 m3/min降到1000 m3/min以下，减少了采空区漏风；同时采用向采空区注入液态CO2与氮气等综合防灭火措施。在综合防灭火措施实施15天，CO浓度降至10×10-6，有效控制了采空区自燃发火的发展，消除了自燃发火的隐患。
展开▼
