中文摘要：

针对煤层深孔聚能爆破瓦斯抽放封孔技术问题,通过分析聚能爆破施工工艺及封孔物质力学行为,发现爆破孔孔径和封孔材料性质是影响封孔长度的主要因素.综合分析爆破安全、抽放工艺和施工条件,确定聚能爆破合理封孔长度为7.5～10.0 m.以焦煤集团九里山矿14121和24021工作面为例,对煤层深孔聚能爆破封孔技术可行性进行了验证.

英文摘要：

The construction technology of cumulative blasting and the mechanical behavior of sealing materials were analyzed for the gas drainage sealing technology of coal bed deep-hole cumulative blasting.It is shown that blast hole diameter and sealing material properties are the main factors which influence sealing length.After comprehensive analysis of blasting safety,drainage technology and constructional conditions,the reasonable sealing length of cumulative blasting is considered to be in the range of 7.5 to 10.0m.Finally,the feasibility of coal bed deep-hole cumulative blasting sealing technology was tested with the 14121 and 24021 working faces in Jiulishan Coal Mine of Jiaozuo Coal Group as an example.