崔庄煤矿在放顶煤开采后,回风隅角及回风流的 CO 质量浓度分别达到8.5×10~(-5)、1.206×10~(-3),C_2H_6质量浓度达到4.5×10~(-5),发生煤层自燃灾害。根据该采空区地质条件,设计了三开井身结构,对采空区进行地面注浆及封堵处理。经检测,钻孔注浆灭火后,煤炭自燃标志性气体的质量浓度降至正常状态。
【英文论文摘要】
After the caving method is carried out in Cuizhuang coalmine,CO mass concentration in air return comer and upcast air is 8.5x10~(-5),1.206x10~(-3) respectively;C_2H_6 mass concentration is 4.5x10~(-5),and spontaneous combustion happened.According to geological condition of this mined-out area,a three hole-ins well has designed to carry out surface grouting and fire-area sealing.After inspection,mass concentration of coal spontaneous combustion indicating gas has lowering down to normal value.
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