Coal Mine Rail Types & Selection: Light, Heavy & Crane Rails

The rail is a critical component of the coal mine transport system: the right model and parameters directly affect production efficiency and mine safety. Coal mine rails are divided by use and load capacity into light rails, heavy rails and crane rails - and within each family the model number expresses the mass per meter, which drives every other dimension.

1. Light Rails

Use: light, low-speed internal transportation - haulage roads, branch lines and temporary workings.

Models (kg/m): 15, 18, 22, 24, 30 (per GB/T 11264; 8 kg/m ministry-standard variants also exist).

Character: flexible, low cost, easily laid and relaid - suited to the changing workings of a mine.

Key parameters: rail height, base width and head width decide load capacity and service life.

Material: typically 55Q (medium-manganese carbon steel).

light steel rails

Classification		Height(mm)	Head (mm)	Bottom (mm)	Thick(mm)	Weight (kg/m)
Light Rail	8 KG/M	65	25	54	7	8.42
	9 KG/M	63.5	32.1	63.5	5.9	8.94
	12 KG/M	69.85	38.1	69.85	7.54	12.2
	15 KG/M	79.37	42.86	79.37	8.33	15.2
	18 KG/M	80	40	80	10	18.06
	22 KG/M	93.66	50.8	93.66	10.72	22.3
	24 KG/M	107	51	90	10.9	24.46
	30 KG/M	107.95	60.33	107.95	12.3	30.1

2. Heavy Rails

Use: heavy and high-speed transport - main tunnels and trunk haulage roads.

Models (kg/m): 38, 43, 50, 60 (per GB/T 2585).

Character: high load capacity and durability; stable under high loads and speeds.

Parameters: beyond height, base and head width, waist height and waist thickness are controlled for higher load requirements.

Material: 55Q, U71Mn and similar grades.

Classification		Height(mm)	Head (mm)	Bottom (mm)	Thick(mm)	Weight (kg/m)
Heavy Rail	38 KG/M	134	68	114	13	38.733
	43 KG/M	140	70	114	14.5	44.653
	45 KG/M	145	67	126	14.5	45.546
	50 KG/M	152	70	132	15.5	51.514
	60 KG/M	176	73	150	16.5	60.64

3. Crane Rails

Use: hoisting installations in mines - overhead cranes, gantry cranes and elevators.

Models: QU70, QU80, QU100, QU120 (mass 52.8-118.1 kg/m).

Character: designed for very high vertical and lateral wheel loads; low profile with a wide head and web for stability.

Key parameters: rail height, base width, waist height and thickness, and head "jaw" (flange) width.

crane rail

Classification		Height(mm)	Head (mm)	Bottom (mm)	Thick(mm)	Weight (kg/m)
Crane Rail	QU 70	120	70	120	28	52.8
	QU 80	130	80	130	32	63.69
	QU 100	150	100	150	38	88.96
	QU 120	170	120	170	44	118.1

Selection Logic for Mine Rail

Factor	Guidance
Track gauge	Match rail to gauge: 600 / 762 / 900 mm are common mining gauges; each gauge constrains wheelbase and rail head width
Axle load and locomotive	Heavier mine locomotives and wagons need heavier rail (30-60 kg/m); battery trolleys on branch lines can use light rail
Curve radius	Sharp curves favor lighter, more flexible rail; lay minimum radii per design rules
Material grade	55Q for general mine service; U71Mn for high-wear main tunnels
Joints and fastenings	Fishplates, bolts and spike/screw systems must match the rail section

Safety and Maintenance

Inspect rail wear, especially in curves: head wear beyond limits means replacement, not just monitoring.

Check fishplate joints regularly - loose joints are a leading cause of derailment risk underground.

Keep fastening systems tensioned; use torque-controlled screw spikes on concrete sleepers.

Maintain drainage and ballast condition; wet, fouled track accelerates rail and fastener corrosion.

Selecting the coal mine rail model means matching the rail mass to the transport duty - light rails for light internal haulage, heavy rails for main tunnels, and crane rails for hoisting systems - and verifying gauge, axle load, curve radius and material grade against the mine's design. Correct selection and maintenance keep both efficiency and safety underground.