(1) non-ferrous metals should be used open pit mine excavator loading process; the bulk material should use standard bucket, rock hard materials should be selected buckets, when the floor is not flat, should use a backhoe excavator;
    (2) Shovel loading with large amount of excavation, looseness or consolidation without dense soil rock, optional loading technique of rope bucket excavator;
    (3) Shovel loading of sand mine and soft topsoil and weathered rock, optional wheel shovel loading process;
    (4) For short-loading and loose material shipment, the loader loading process can be adopted;
    (5) The materials are loose, the loading surface is smooth and open, and the transportation distance is 800m ~ 2000m . The scraper loading process can be adopted.
    2 single row of holes blast, when using motor transport, the minimum width of the working platform is to comply with Table 7.6.2-1; with railway transport, the minimum width of the working platform is to comply with Table 7.6.2-2.
Table 1-1 Minimum working platform width for car transport ( m )
| Platts coefficient ( f ) | Step height ( m ) | |||
| 8 | 10 | 12 | 15 | |
| >12 | 30 to 32 | 32 to 36 | 36 to 41 | 42 to 48 |
| 6 to 12 | 27 to 29 | 29 to 31 | 32 to 35 | 38 to 41 |
| < 6 | 25 to 27 | 27 to 29 | 30 to 32 | 35 to 38 |
Table 1- 2 Minimum working platform width of railway transportation ( m )
| Platts coefficient ( f ) | Step height ( m ) | |||||
| 10 | 12 | 15 | ||||
| Quasi-rail | Narrow gauge | Quasi-rail | Narrow gauge | Quasi-rail | Narrow gauge | |
| >12 | 39 to 41 | 37 to 39 | 44 to 46 | 42 to 44 | 54 to 56 | 52 to 54 |
| 6 to 12 | 34 to 36 | 32 to 34 | 39 to 41 | 37 to 39 | 46 to 48 | 44 to 46 |
| <6 | 29 to 31 | 27 to 29 | 34 to 36 | 32 to 34 | 38 to 40 | 36 to 38 |
    3 The minimum working line length of the single bucket excavator can be selected according to Table 3 .
Table 3 Minimum working line length of single bucket excavator
| Bucket volume (m 3 ) | Railway transportation ( m ) | Car transport (m) | |
| Single row hole blasting | Multi-row hole extrusion blasting | ||
| 1 to 2 | 200 to 300 | 150 | 100 |
| 4 | 450 | 200 | 150 |
| ≥8 | ≥500 | ≥300 | ≥200 |
    4 Two or more excavators work on the same platform. When transporting the vehicle, the distance between the excavators should not be less than 3 times of the maximum digging radius and should not be less than 50 m . When the locomotive is transported, the distance between the excavators should not be less than two columns. The length of the train.
    5 Excavators working at the same time on the upper and lower steps should be staggered along the steps; the excavator assisting the safety belt at the edge of the upper step should be 3 times the maximum excavation radius of the excavator working normally in front of the lower step . And should not be less than 50m .
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