LHD Cable for Underground Mining Scooptram Trailing Duty

An LHD machine loads, hauls and dumps a few hundred tonnes per shift — and drags its power cable behind it over broken rock the entire time. The LHD cable (load-haul-dump, scooptram trailing cable) is one of the most punishing flexible cable duties in industry: abrasion against rock and ore, impact from falls, constant tensile load, tight bending at the cable handler, plus oil, water and mud in the heading. Cable failure here stops production immediately. This page explains how a proper scooptram cable is built, what to check when selecting one, and how we confirm the construction for your machine and mine conditions.

Product Overview

LHD cables feed electric power from the mine's transformer or switchgear to the machine, trailing behind it through the tunnel and recovering onto a cable handler or reeler as the machine advances. The same cable family serves mucking machines, drill jumbos and other tracked or wheeled underground equipment.

Two installation styles dominate: pure trailing, where the cable lies on the ground and is dragged; and trailing with reeler or cable handler, where the cable spools in and out under controlled tension. Trailing duty sets the mechanical bar — the sheath must survive sliding over sharp rock, and the construction must carry the machine's pull without conductor damage.

Typical constructions use flexible class 5 (or class 6 for extreme flexing) stranded copper conductors, EPR insulation rated 90°C, cores laid up with a sliding bed, and a heavy-duty chloroprene or PUR outer sheath engineered for cut and abrasion resistance. Voltage ratings commonly specified are 0.6/1kV, with 1.9/3.3kV for higher-power machines. Pilot cores for earth-leakage monitoring and integrated fiber optic elements for data are common options. Exact configurations are confirmed per project against the machine manual and mine requirements.

Key Features / Construction

• Flexible class 5 / class 6 stranded copper conductor (tinned options), IEC 60228
• EPR insulation, 90°C continuous, resistant to moisture and mechanical stress
• Heavy-duty outer sheath: abrasion- and cut-resistant chloroprene, or high-wear PUR
• Integrated tensile strength member options where the machine pull is carried by the cable
• Semiconductive or monitoring pilot core options for earth-fault protection
• Optional integrated fiber optic cores for machine data and communication
• Flame retardant, oil resistant and low-smoke compound options for underground fire safety
• Small bending radius for cable handler and reeler compatibility
• Rated voltages commonly 0.6/1kV; 1.9/3.3kV on request — confirm per TDS

Standards & Certifications

• Conductors per IEC 60228 (class 5 / 6 flexible)
• Design practice aligned with IEC 60245 for flexible rubber cables, adapted to trailing duty
• Flame retardance tested per IEC 60332 family where specified for the zone
• Project-specific tests: abrasion, tensile, flexing cycles and drum/trailing simulation per specification

Underground mines may impose site-specific or national approval requirements beyond the IEC framework. We confirm what applies to your mine and state on the TDS exactly which tests and approvals the supplied type carries — no assumptions. Refer to the Certifications page or contact us with your mine's requirement list.

Applications

• Underground metal and non-metal mines — LHD / scooptram power supply
• Mucking machines, drill jumbos and scaling rigs
• Tunneling and infrastructure projects with trailing power duty
• Open-pit auxiliary equipment using reeling or festoon supply
• Mine maintenance and rebuild shops needing spare and replacement lengths

Why Choose Anhui Tiankang

• Trailing-duty engineering, not adapted building wire. Conductor class, stranding pitch, bedding and sheath compound are selected as a dragging system — the failure modes we design against are the ones that stop your heading.
• Machine-matched confirmation. Send the LHD make, model and cable handler type — we verify core layout, tensile requirement and bending geometry against the machine data before quoting.
• Compound honesty. We recommend chloroprene or PUR by actual ground conditions and spill exposure, and state wear expectations on the TDS instead of promising universal lifetimes.
• Monitoring-ready options. Pilot cores and fiber integration supplied and documented where your protection system requires them.
• Documented supply. TDS, test reports and drum packing plans accompany each shipment; batch marking supports mine store traceability.

Selection Guide / Buying Considerations

1. Identify the machine and duty: LHD make and model, trailing only or cable handler/reeler, and typical travel distance per cycle.
2. Confirm electrical data: system voltage (0.6/1kV typical, 1.9/3.3kV for higher power), current draw, and required core layout — e.g. 3x35+3x6/2, 4x25, with or without pilot cores and fiber.
3. Define the mechanical load: who carries the pull — the conductors, a dedicated tensile member, or both; state maximum tension if known.
4. Describe the ground and environment: sharpness of muck, water and oil exposure, temperature range, and any flame or smoke requirements of the mine.
5. Check the existing cable marking: a photo of the old cable lets us match or upgrade the construction directly.
6. Provide quantity, preferred drum lengths and delivery point.

FAQ

Q1: Trailing or reeling — what is the difference for LHD cable?
Trailing cable is dragged on the ground and needs extreme abrasion and cut resistance plus tensile strength; reeled cable is wound on a drum or handler and adds tight, repeated bending to the same abuse. Tell us which duty applies and we confirm the construction accordingly.

Q2: How long will the cable last on the machine?
Lifetime depends on ground conditions, travel distance, tension discipline and handler alignment — no honest supplier quotes a universal number. We state the wear-relevant construction data on the TDS and can propose reinforced sheaths for severe headings.

Q3: Why do some LHD cables include a pilot core?
Pilot cores carry the earth-leakage monitoring signal that trips the supply when the cable is damaged — a core safety function in underground power systems. We supply pilot-core layouts matching your protection relay.

Q4: Can the cable carry fiber optic lines as well?
Yes — integrated fiber cores for machine data are a common option and are documented in the TDS with their protection elements.

Q5: What do you need to quote an LHD cable?
Machine make and model, voltage and core layout, handler or reeler type, and photos of the existing cable. Use the contact page to send these and we return a matched quotation with TDS references.

Contact / Request a Quote

Send your machine data, cable marking photos or mine cable schedule through the contact page. We will confirm the LHD trailing construction, monitoring options and test documentation for your duty, and return a quotation with delivery plans.