摘要

为实现王坡煤矿3号煤的安全回采,在3316工作面进行了综放工作面瓦斯抽采钻孔封孔技术的研究。钻屑法测试表明,3号煤层的巷道松动圈深度为0~10 m,由此封孔深度确定为12 m。采用新型无机封孔材料进行瓦斯抽采钻孔封孔。结果表明,最高抽采瓦斯浓度为90%,120 d的观测期内有90 d的日平均浓度大于50%,取得了较好的抽采效果。

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