孔径只负责建立候选范围 Diameter defines an initial shortlist
先把目标孔径与各型号的参考孔径范围对照，排除明显不匹配的候选；不要仅因范围包含目标孔径就直接确定型号。 Compare the required diameter with each model’s reference range and rule out clear mismatches. A diameter match alone does not establish suitability.
孔深和空间会改变选择 Depth and space affect selection
孔深、岩性、作业方向、现场空间、搬运条件和班次节奏都会影响设备与钎具配置。向上作业、手持式和气腿式也不能按同一逻辑混选。 Hole depth, rock, direction, working space, handling and work cycle affect both the drill and its tooling. Upward, handheld and air-leg designs need different selection criteria.
供气是必须同步核对的条件 Check air supply at the same time
需要把空压机、管路长度与内径、接头、末端压力和同时开机数量一起提供。 Provide compressor details, hose length and internal diameter, connections, pressure at the tool and the number of drills operating together.
- 岩性 Rock type
- 孔径和孔深 Hole diameter and depth
- 方向和空间 Direction and working space
- 供气与同时开机数量 Air supply and simultaneous drill count
- 钎具和配套件 Drill tools and accessories