This page explains how Underground Loader (LHD) is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
A specialized mining vehicle designed for loading, hauling, and dumping fragmented rock and ore in underground mines.
Technical details and manufacturing context for Underground Loader (LHD)
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Bucket CapacityRequired | 1.5–10.0 m³ | 1.5–10.0 — Heaped capacity per SAE J742; range covers compact to large underground LHDs. Heaped capacity per SAE J742; range covers compact to large underground LHDs.ISO 7546 |
| Dump HeightRequired | 1500–3500 mm | 1500–3500 — Clearance under fully raised bucket; must match truck or chute height. Clearance under fully raised bucket; must match truck or chute height. |
| Engine PowerRequired | 60–350 kW | 60–350 — Net power at flywheel; diesel or electric motor. Net power at flywheel; diesel or electric motor.ISO 9249 |
| Operating WeightRequired | 8–50 t | 8–50 — Includes standard bucket, full fluids, and operator. Includes standard bucket, full fluids, and operator. |
| Payload CapacityRequired | 3–15 t | 3–15 — Rated load; typically 2–3 times bucket capacity depending on material density. Rated load; typically 2–3 times bucket capacity depending on material density.ISO 7546 |
| Tramming Speed | 0–25 km/h | 0–25 — Maximum speed on level ground; lower in ramps. Maximum speed on level ground; lower in ramps. |
| Breakout Force | 50–200 kN | 50–200 — Force at bucket edge to penetrate muck pile. Force at bucket edge to penetrate muck pile. |
| Tire Size | 12.00–35.00 R24–R35 | 12.00–35.00 — Pneumatic tires; foam-filled or solid for puncture resistance. Pneumatic tires; foam-filled or solid for puncture resistance.ISO 4250-1 |
| Hydraulic System Pressure | 16–25 MPa | 16–25 — Working pressure for bucket and steering cylinders. Working pressure for bucket and steering cylinders.ISO 4413 |
| Gradeability | 25–40 % | 25–40 — Maximum gradient at rated load; depends on traction and power. Maximum gradient at rated load; depends on traction and power. |
| Turning Radius (outer) | 4000–8000 mm | 4000–8000 — Articulated steering; critical for narrow drifts. Articulated steering; critical for narrow drifts. |
| Noise Level (operator ear) | ≤85 dB(A) | ≤85 — With cab closed; may be higher without cab. With cab closed; may be higher without cab.ISO 6395 |
| Emission Standard | Tier 4 / Stage V | Tier 4 / Stage V — Diesel engines; electric versions have zero emissions. Diesel engines; electric versions have zero emissions.EU 2016/1628 |
| Bucket Material | Hardox 450 / 500 | Hardox 450 / 500 — Wear plates; thickness 10–25 mm. Wear plates; thickness 10–25 mm.EN 10025-6 |
| Frame Material | Q345B / S355JR | Q345B / S355JR — High-strength low-alloy steel for main frame. High-strength low-alloy steel for main frame.GB/T 1591 / EN 10025-2 |
| Ambient temperature | -20°C to +50°C | -20°C to +50°C — Outside this window: Hydraulic oil viscosity changes; seals may fail below -20°C, overheating above 50°C. Outside this window: Hydraulic oil viscosity changes; seals may fail below -20°C, overheating above 50°C. |
| Altitude | 0–3000 m | 0–3000 m — Outside this window: Engine power derates above 1500 m; turbocharging required above 3000 m. Outside this window: Engine power derates above 1500 m; turbocharging required above 3000 m. |
| Tunnel clearance | Width: 2.5–5.0 m; Height: 2.5–4.5 m | Width: 2.5–5.0 m; Height: 2.5–4.5 m — Outside this window: Machine cannot maneuver or may hit roof; requires custom width. Outside this window: Machine cannot maneuver or may hit roof; requires custom width. |
| Material density | 1.5–3.0 t/m³ | 1.5–3.0 t/m³ — Outside this window: Exceeding rated payload causes structural overload and tire failure. Outside this window: Exceeding rated payload causes structural overload and tire failure. |
| Duty cycle | Continuous operation up to 20 h/day | Continuous operation up to 20 h/day — Outside this window: Excessive heat buildup in hydraulics and electric motors; reduced service life. Outside this window: Excessive heat buildup in hydraulics and electric motors; reduced service life. |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
Commonly used trade names and technical identifiers for Underground Loader (LHD).
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
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An LHD (Load-Haul-Dump) loader is used in underground mining to load blasted rock or ore, haul it through tunnels, and dump it at a designated location such as an ore pass or into a truck. It combines loading, hauling, and dumping functions in one machine.
Bucket capacities for underground LHDs typically range from 1.5 to 10.0 cubic meters, measured as heaped capacity per SAE J742. The exact capacity depends on the machine size and application. Always confirm with the manufacturer for the specific model.
LHD machines are subject to various standards such as ISO 7546 for bucket capacity, ISO 9249 for engine power, ISO 4413 for hydraulic systems, and ISO 6395 for noise levels. Emission standards may include EU 2016/1628 (Stage V) or equivalent. Verify compliance with the manufacturer.
LHDs use articulated steering, which allows the machine to pivot in the middle, reducing the turning radius. This enables maneuvering in narrow drifts. The outer turning radius typically ranges from 4000 to 8000 mm, depending on the model. Tunnel clearance requirements are width 2.5–5.0 m and height 2.5–4.5 m.
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