One of the most vital equipment in the underground mining sector is the LHD machine. Another name for it is load haul dump. It is a medium-sized undercover mining vehicle that loads, haul, and dumps metalliferous ore from an open stope to a waiting truck. These machines are also some of the most potent heavy-duty machinery in the world, built for maximum effectiveness.
Similar to traditional front-end loaders, LHD or "Load Haul & Dump" machines are loaders. Underground mining operations commonly use these loaders to move items such as hard rock between different sites safely and securely. With Load-Haul-Dump machinery, you can load 50% more in a smaller package than you can with a conventional front-end loader, but you can travel at a slower speed than you would with a traditional front-end loader.
Features of LHD
- LHDs have smaller footprints and longer, narrower profiles than other front-end loaders. There is no limitation to the size of the working setting, including small tunnels and stopes as well as massive ones.
- Although the longer and narrower dimension of the machine reduces its mobility, it greatly aids in increasing the machine's capacity to load more material.
- LHDs are a highly sought-after option for underground mining operations due to their greater loading capacity.
- The LHD is a rubber-tired mounted machine powered by a flame-proof diesel engine or an electric motor.
- Due to the mounted tire, the LHD machine drives fast. It also has a maximum distance of 90 meters from the face of the chain or belt conveyor.
- LHDs are also equipped with remote controls. These controls allow LHDs to be operated more easily in difficult working conditions when loose rock may pose a fall hazard.
When compared to their conventional equivalents, LHDs offer improved work turnaround time. Productivity is increased while operating and maintenance costs are decreased because of the improved drive systems and smoother operation. In addition to faster acceleration and lower fuel consumption, the LHD machine comparatively tiny engine offers reduced pollutants and heat load.
As a result of these and other factors, the LHDs are productivity-focused devices that deliver top-notch performance under all working conditions.
Operator safety and comfort have significantly increased with time. Most operator cabins in LHDs made by some of the leading manufacturers in the business include a variety of comfort and safety amenities that help simplify operations and boost output.
The interactive displays' built-in diagnostics and real-time operational data offer insightful information about how the machine operates. Ergonomic controls and optional interior amenities, including air-suspended chairs, provide comfort throughout extended operation hours.
Considerations for Safety
LHD operators should conduct daily evaluations and inspections of their tools. Most LHDs come equipped with various improved safety measures, such as redundant/failsafe braking systems, emergency stop systems, and certification for the operator's cabin in ROPS/FOPS (Rollover Protection Structure/Falling Object Protection Structure). Operator safety is considered throughout the design of all platforms, steps, railings, and staircases.
Some safety precautions to remember to include the following:
- Check for wear or damage on the seat belt mounting hardware.
- Replace any broken or worn mounting hardware.
- Ensure the mounting bolts are tightly fastened.
- Examine the buckle for signs of wear or damage. Replace the seat belt if the buckle is broken or worn.
- To maintain appropriate functioning and to ensure that doors stay closed under all operating circumstances, door hinges and latch systems should be inspected.
In addition, workers must ensure that restraining devices are used whenever available and that equipment is in good working order.
Reliability of LHD
This equipment's sturdy steel frame protects against abrasion and impact by severe working conditions. Every LHD machine is designed to endure underground mining sites' most difficult operating circumstances.
A central automatic lubrication system is another feature common to LHDs. It keeps these machines' important joints well-lubricated for longer operations. It lessens the requirement for routine maintenance, which would otherwise prevent operations from moving forward.
The speed of technological advancement in mining and the need for resources on a global scale have made productivity a top priority in the sector. With its simple maintenance and user-friendly design, the LHD machine offers a high level of safety for both the operator and the immediate surroundings.