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为克服普通法掘进天井的多种弊病,如安全性差,粉尘浓度高,作业条件差,劳动强度大,木材耗量高及工程质量难保证等问题,金河磷矿研制出CZJ—1900A型盲天井钻架。该钻架与YGZ 90型外回转凿岩机配套,以压缩空气为动力,用于盲天井深孔一次爆破成井工艺,接杆钻凿向上平行中深孔;或在分段崩落法中钻凿切割槽平行中深孔;亦可用于钻凿大直径垂直深孔及其它类似炮孔。
In order to overcome many shortcomings of common law tunneling, such as poor safety, high dust concentration, poor working conditions, heavy labor intensity, high wood consumption and difficult to guarantee the quality of the project, Jinhe Phosphorus Mine developed CZJ-1900A blind Patio drilling rack. The drill rig and YGZ 90 rotary drilling rig supporting the use of compressed air as a driving force for a blind deep hole blasting a well into the process, the post drilling up parallel to the deep hole; or in the subsided caving cutting groove Parallel to the deep hole; can also be used to drill large diameter vertical deep hole and other similar holes.