602队所勘探的矿区,大多是白云石化矽化灰岩或白云化方解石夾杂的矽化灰岩,层、节理发达,在矿体部份角礫岩化也比較发育,在某些层位中尚有蜂窩狀的細小晶孔、小裂隙及断层,地質变化复杂,尤以杉木硐一號坑为甚。因此在坑探凿岩爆破工作中,常发生空槍、瞎砲及效果不好等現象。采用了直線七眼掏糟爆破方法之后,虽然工效較前有所提高,但在佈眼爆破爆技术上還存在著一定的問題,仍有空槍、瞎砲、台班效率及爆破率低且不稳定的情況。究其原 Most of the mining areas explored by the 602 team are dolomitic slaked limestone or dolomitized limestone with dolomite calcite, with barber layers and sections. Some of the breccia in the ore body is also well developed. There are honeycomb small holes, small cracks and faults, and the geological changes are complicated, especially in the fir crater No. 1 pit. Therefore, in the blasting work of pit rock drilling, empty guns, mortars, and bad effects often occur. After adopting the straight-line seven-eye blasting method, although the ergonomics have been improved, there are still certain problems in the technology of blind explosion blasting. There are still empty guns, mortars, platoons, and low blasting efficiency. Unstable situation. Study its original