大断面立井5m深孔控制爆破技术研究
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摘要
针对思山岭铁矿副立井5m深孔控制爆破炮眼利用率低、爆破质量差的问题,提出了周边眼配合外圈浅眼控制井帮质量、间隔双管正反向装药和二阶直眼分段式掏槽的优化技术措施,并进行了现场爆破试验。结果显示:优化后的5m深孔控制爆破,炮眼利用率达到90%以上,解决了井帮超欠挖、爆破飞石等问题,提高了爆破效果,技术经济效益明显。
According to low utilization rate of the 5mdeep controlled blasting borehole and poor blasting quality in an auxiliary mine shaft of Sishanling Iron Mine,optimized technical measures of the mine shaft wall quality control with the periphery boreholes combined with shallow boreholes along the external ring,interval double pipes with forward and reverse charging and two stage vertical borehole sectional cutting were provided and a site blasting trial was conducted.The results showed that after the optimization of the 5mdeep borehole controlled blasting,the utilization of the blasting boreholes was over 90%.Thus the shaft wall overbreak or underbreak,blasting flying rock and other problems were solved,the blasting effect was improved and the technical and economic benefits were remarkable.
According to low utilization rate of the 5mdeep controlled blasting borehole and poor blasting quality in an auxiliary mine shaft of Sishanling Iron Mine,optimized technical measures of the mine shaft wall quality control with the periphery boreholes combined with shallow boreholes along the external ring,interval double pipes with forward and reverse charging and two stage vertical borehole sectional cutting were provided and a site blasting trial was conducted.The results showed that after the optimization of the 5mdeep borehole controlled blasting,the utilization of the blasting boreholes was over 90%.Thus the shaft wall overbreak or underbreak,blasting flying rock and other problems were solved,the blasting effect was improved and the technical and economic benefits were remarkable.
引文
[1]田柯.深井大断面马头门支护理论及技术研究[D].太原:太原理工大学,2011.
[2]黄永辉,程志彬,沈慰安,等.立井4.9m深孔锥形掏槽爆破试验研究[J].工程爆破,2013,19(3):23-25.
[3]苏洪,颜事龙,李萍丰.超深孔光面爆破在立井施工中的试验与研究[J].煤炭技术,2014,33(8):52-55.
[4]宋永平.光面爆破技术在竖井掘进施工中的应用[J].新疆有色金属,2011(4):76-79.
[5]李清,张随喜,张迪,等.立井基岩深孔定向断裂爆破应用技术研究[J].建井技术,2013,34(1):28-30.
[6]倪世顺.立井分段掏槽爆破技术应用研究[J].煤炭科学技术,2008,36(7):34-37.
[2]黄永辉,程志彬,沈慰安,等.立井4.9m深孔锥形掏槽爆破试验研究[J].工程爆破,2013,19(3):23-25.
[3]苏洪,颜事龙,李萍丰.超深孔光面爆破在立井施工中的试验与研究[J].煤炭技术,2014,33(8):52-55.
[4]宋永平.光面爆破技术在竖井掘进施工中的应用[J].新疆有色金属,2011(4):76-79.
[5]李清,张随喜,张迪,等.立井基岩深孔定向断裂爆破应用技术研究[J].建井技术,2013,34(1):28-30.
[6]倪世顺.立井分段掏槽爆破技术应用研究[J].煤炭科学技术,2008,36(7):34-37.