摘要
针对岩巷揭露通过原始瓦斯压力2.0 MPa以上的突出煤层危险性大、防突要求高的情况,在分析实际工程设计和煤层瓦斯赋存参数的基础上,采取先施工揭煤辅助巷道,然后在辅助巷中一次性施工瓦斯抽采钻孔,同时,辅以松动爆破增加煤层透气性,掘进中注浆加固顶板增加围岩稳定性等技术手段,使整个防突过程既避免了与高危险性突出煤层消突前的直接接触,又有利于实现较好的防突措施效果,确保了岩巷揭煤过程的施工安全。
According to the high danger of outburst seam with an in-situ gas pressure over 2.0 MPa,high requirements of the outburst prevention and other objective conditions in mine rock roadway heading passing through outburst seam,based on the analysis on the actual engineering design condition and seam gas deposit parameters,a mine auxiliary roadway firstly constructed was proposed and conducted and then a primary construction of gas drainage boreholes was conducted in the auxiliary roadway.Meanwhile,a standing blasting was applied to improve the seam permeability.A grouting reinforced roof was applied to improve the stability of the surrounding rock and other technical means were applied to the mine roadway heading.Therefore,the completed outburst prevention process could not only avoid the direct contact the high danger outburst seam before the outburst eliminated,good effects of outburst prevention measures would favorably realized and the construction safety of the seam opening process could be ensured in the mine rock roadway heading.
出处
《煤炭科学技术》
CAS
北大核心
2013年第1期66-69,81,共5页
Coal Science and Technology
关键词
辅助巷
瓦斯抽采
松动爆破
管棚注浆
揭煤
mine auxiliary roadway
gas drainage
standing blasting
tube shield grouting
seam opening
