谦比希铜矿东南矿体上向扇形中深孔爆破技术试验及应用

针对谦比希铜矿东南矿体采场上向扇形中深孔凿岩过程中存在的钻孔偏斜大,爆破后顶板、边帮控制差,爆破大块率高及切割井施工周期长等问题,采用定制凿岩专用稳杆器、炮孔设计中边帮使用垂直孔、在原有炮孔设计2排炮孔中增加辅助排、根据不同岩石采用不同参数的孔排距、增加爆破规模、孔口堵塞长度等措施对上向扇形中深孔爆破方案进行优化,并采...

Experiment and application of upward fan-shaped medium-long hole blasting technology to the southeast ore body of Chambishi Copper Mine

In view of the problems existing in the drilling process in the upward fan-shaped medium-long hole stope of the southeast ore body of Chambishi Copper Mine,such as large deviation of drilling hole,poor control of roofs and sides after blasting,high blasting lump rate and long construction period of cutting shafts,etc.,through the customized use of special rod stabilizer for rock drilling,the use of vertical holes in the blasthole design,the addition of auxi-liary rows in the original two rows of blasthole design,the adoption of hole spacing of different parameters in different rocks,the increase of blasting scale and the length of hole blockage and other measures to optimize the upward medium-long hole blasting scheme,the optimized measures and schemes of shaft sinking by single-time upward fan-shaped medium-long hole blasting are applied in situ in the test stope.The results show that compared with the original method,the borehole deviation is reduced from 15 m hole depth with deviation 2.0-2.5 m to 1.0-1.5 m,the deviation rate is reduced by 50%-60%,the roof and side are relatively flat after blasting,the blasting lump rate is reduced to less than 10%,and the construction period of 15 m cutting shaft is shortened.The optimized scheme solves the problems existing in the upward fan-shaped medium-long hole blasting in the mine,and has important application value and theoretical significance in improving the economic benefit of the mine and realizing the designed mine production.