According to the existing service conditions, the choice of Φ5mm model E5015 (J507) or E5016 (J506) electrode, used excavator sales information, at a temperature of 350 ℃ baking 2h, and then at 100 ℃ insulation, prevent the electrode to absorb moisture, with the use of take; welding current 190 ~ 230A. Due to the large excavator side plating, welding parts before welding should be preheated to 150 ~ 250 ℃; the welding process, can be segmented, symmetry, backward method welding; weld cooling process should continue with Hand percussion hammer weld metals to eliminate stress; at the corner side welding, to avoid ups and downs arc defects, welding should be continuous in order to improve the situation by force connection. Positive action in the form of shovel excavator shovel excavator shovel. Its characteristics are "forward upward force cut soil." Shovel digging force, second-hand excavator sales market, can stop above the surface of the soil excavation, it should be used for dry excavation pit height of more than 2m, used excavator sales center, but must set up and down ramps. Shovel bucket compared with the backhoe excavator bucket equivalents to be larger, second-hand excavator sales Fuzhou, can excavate moisture content of not more than 27% of one to three types of soil, and the dump truck with the completion of the entire mining transport operations, also can tap the large drying pit and mound like. Shovel excavator excavation depending on the relative positions of the excavation route and transport vehicles, excavators and dump mode has the following two: forward excavators, dump side; forward excavators, anti- to dump.