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Practice Analysis and Discussion of a Model Undertaking Equipment
To ensure safe and efficient operations in mining environments, it's essential to address issues that contribute to tire wear and vehicle instability. Partial loading—especially on the sides or back of the vehicle—can lead to rollover or road accidents, particularly when navigating sharp curves. These incidents not only pose safety risks but also accelerate abnormal tire wear. Therefore, it's crucial for electric excavator operators to be vigilant and report any improper loading practices immediately to on-site dispatchers. In cases where hydraulic damping imbalances cause the bucket to tilt, leading to partial loading, the damping cylinder pressure should be adjusted or stopped right away.
Implementing strict speed management policies is another key measure. Clear guidelines should be established for different routes and locations, with drivers required to strictly follow these standards. Regular inspections by a dedicated speed management team can help enforce compliance. Random checks are essential, and any speeding behavior must be addressed promptly to maintain control over vehicle movement.
Road maintenance plays a vital role in preventing tire damage and ensuring smooth operations. The concept of "cultivating the road, repairing the car" should be emphasized, with efforts focused on maintaining even road surfaces from the source. During the excavation and loading processes, electric excavator operators must clear the bottom area regularly to keep the loading points smooth. Mining process managers should oversee daily operations to prevent over-excavation or under-excavation, which can create uneven roads and force vehicles to make frequent turns, increasing tire wear.
To avoid S-shaped roads in the stope, the stripping work line must be developed straight and balanced. Large rock blocks larger than 10 meters should be treated with two explosions. The layout of high-voltage lines must be horizontal and vertical, with proper cable placement for electric excavators and rigs. If necessary, cables should be elevated to avoid interference. Power supply lines for major equipment should ensure a straight moving path for the stope. At unloading points, sufficient return lengths (typically more than 25 meters) must be maintained. When double-bar stops are installed at slipways, they should be arranged in an inverted "eight" shape to improve maneuverability.
In areas where the rock is weathered and contains significant soil, especially during the rainy season, roads can become soft or unstable. To mitigate this, a layer of moderate rock should be pre-padded before the rainy season to maintain a firm road surface. The main road should be 11 meters wide, free of deep pits, and any issues should be repaired promptly. A professional maintenance team should be assigned to clean up loose materials and debris from the road surface.
Tire maintenance is equally important. If tread rubber peels off or separates from the tire body, it should be inspected and repaired if possible. For severe swelling, the affected area must be removed, while minor swelling can be fixed. Uneven wear caused by incorrect air pressure or load distribution should be checked and corrected. Polygonal wear may indicate brake or wheel alignment issues, and shallow cracks should be monitored closely. If a tire shows signs of damage or excessive wear, it should be replaced. On rough roads, such as those with 5 shaft wells and 7 auxiliary winches, specialized equipment like the CYS or CY type bottom cradle is used to ensure stability.
A new type of lifting cage receiving device has been introduced, featuring a strong spring as a cushioning component. This device combines the benefits of a cradle and a can while eliminating their drawbacks. It offers accurate positioning, easy access to mine cars, and effective buffering to reduce impact forces on the cage, its contents, and wellbore equipment. Even when operating at high speeds, the device ensures safe operation. It can also accommodate large parking position errors due to depth changes or load variations, preventing collisions. This improves lifting efficiency and enhances overall operational safety.