摘要
针对龙华煤矿3-1煤层30106及30107工作面埋深浅,工作面上方存在2-2煤层大漏风火区,火区范围广等难题,结合2-2煤层火区的特点,采取了注浆封堵技术、注氮防灭火、30106及30107工作面均压通风等综合治理措施,使30106工作面上方钻孔内的CO体积分数由12 000×10-6降至300×10-6以下,上隅角CO体积分数基本维持在24×10-6以下,确保了工作面的安全回采。
According to No.30106 and No.30107 coal mining faces in No.3-I seam of Longhua Mine had shallow mining depths and above the coal mining faces was a large air leakage firing zone in No. 2-2 seam, the scope of firing zone was large and other problems, in combination with the firing zone features in No. 2-2 seam, the comprehensive control measures were conducted, including grouting sealing technology ,nitrogen injection for fire prevention and control, pressure balanced ventilation for No.30106 and No.30107 coal mining face. The CO volume fraction in the borehole above No. 30106 coal mining face was reduced from 12 000×10^-6 to below 300×10^-6 and the CO volume fraction at the upper corner was basically kept below 24×10^-6 .The safety mining and withdrawing of the coal mining face was ensured.
出处
《煤炭科学技术》
CAS
北大核心
2014年第3期53-56,84,共5页
Coal Science and Technology
基金
国家自然科学基金资助项目(50804022)
重庆市基础与前沿研究计划杰青资助项目(cstc2013jcyjjq90001)
关键词
浅埋深煤层
大漏风火区
煤炭自燃
注浆封堵
均压通风
上隅角CO
注氮
shallow mining depth seam
large air leakage firing zone
coal spontaneous combustion
grouting sealing
pressure balanced ventilation
upper corner CO
nitrogen injection
