CO2anti-reflection pre-splitting testing was successfully applied in ventilation roadway of 15203 working face in Sijiazhuang company, and about ten gas drainage holes and one CO2pre-splitting hole were drilled, and then two CO2anti-reflection pre-splitting testing were applied.According contrastive analysis of testing data, after CO2anti-reflection pre-splitting, under action of pressure re-lief and replacement and displacement by CO2, gas content within pre-splitting scope declined quickly, the maximal content dropped from 12.2m3/t to 6.92m3/t, contrast engineering quality of CO2pre-splitting drilling holes to normal holes, it decreased about 4.1 times, and driving efficiency improved about 1.6 times.The results showed that CO2pre-splitting, anti-reflection technique was better to gas control and local rockburst elimination.%在寺家庄公司15203工作面回风巷进行CO2预裂增透试验,施工10个瓦斯抽采孔, 1个CO2预裂孔,在预裂孔中进行2次CO2预裂增透试验.通过试验数据的对比分析,CO2预裂后,在卸压及CO2置换和驱替共同作用下,预裂范围内的瓦斯含量快速下降,最大瓦斯含量从预裂前的12.2m3/t下降到预裂后的6.92m3/t.CO2预裂钻孔工程量比常规措施钻孔减少了4.1倍;与常规措施相比,掘进效率提高了1.6倍.试验证明CO2预裂增透能起到很好的瓦斯治理和区域消突作用.
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