CONTINUOUS BORING SYSTEMS

Xcel Continuous Boring Miners are custom-built to meet the demands of any mine.

Working in conjunction with its two or four cutting rotors, the cutting chain system ensures that the Xcel Continuous Boring Miner safely produces a uniform cutting path during mine development and production.

Series	Xcel 44	Xcel 32	Xcel 42	Xcel 52	Xcel 72A
Number of Cutting Rotors	4	2	2	2	2
Cutting Rotor Motor Output	298 kW at 1,200 rpm	224 kW at 1,185 rpm	298 kW at 1,185 rpm	373 kW at 1,185 rpm	522 kW at 1,185 rpm
Cutting Rotor Motor Output	400 hp at 1,200 rpm	300 hp at 1,185 rpm	400 hp at 1,185 rpm	500 hp at 1,185 rpm	700 hp at 1,185 rpm
Tramming Speed	0 to 20 ft/min	0 to 20 ft/min	0 to 20 ft/min	0 to 20 ft/min	0 to 20 ft/min
Tramming Speed	0 to 6 m/min	0 to 6 m/min	0 to 6 m/min	0 to 6 m/min	0 to 6 m/min
Cutting Profile Area	203 to 206 ft²	100 ft²	129 ft²	182 ft²	229 ft²
Cutting Profile Area	61.75 to 62.75 m²	30.50 m²	39.25 m²	55.50 m²	39.75 m²
Maximum Cutting Width	25.75 to 26 ft	14 ft	16 ft	18.25 ft	20 ft
Maximum Cutting Width	7.75 to 8 m	4.25 m	5 m	5.50 m	6 m
Maximum Cutting Height	8.25 to 8.50 ft	8.25 ft	8 ft	11.00 ft	12.00 ft
Maximum Cutting Height	2.50 to 2.60 m	2.50 m	2.50 m	3.50 m	3.75 m
Tramming Height	7 to 7.50 ft	7 ft	7.50 ft	9.50 ft	10.50 ft
Tramming Height	2 to 2.25 m	2 m	2.25 m	3 m	3.25 m

The Xcel 4-Rotor Continuous Boring Miner has produced millions of tonnes of ore over the past twenty-five years.

The broad, low-profile Xcel 4-Rotor Continuous Boring Miner is equipped for high-quantity production in sites with spatial restrictions. Its four cutting rotors and horizontal cutting chain system work together to form a flat, smooth cutting channel, no matter the environment. The design of the Xcel 4-Rotor Continuous Boring Miner allows it to cut and convey ore to a site's conveyor belt system or to the Prairie Machine Flexiveyor while continuously tramming forward.

A vital component in some of the most productive potash, salt, and trona mines across the globe, Prairie Machine’s Xcel 4-Rotor Continuous Boring Miner is engineered to safely and proficiently meet the highest production demands.

Series	Xcel 44
Number of Cutting Rotors	4
Cutting Rotor Motor Output	400 hp at 1200 rpm
Cutting Rotor Motor Output	298 kW at 1200 rpm
Tramming Speed	0 to 20 ft/min
Tramming Speed	0 to 6 m/min
Cutting Profile Area	203 to 206 ft²
Cutting Profile Area	18.75 to 19.25 m²
Maximum Cutting Width	25.75 to 26 ft
Maximum Cutting Width	7.75 to 8 m
Maximum Cutting Height	8.25 to 8.50 ft
Maximum Cutting Height	2.50 to 2.60 m
Tramming Height	7.00 to 7.50 ft
Tramming Height	2 to 2.25 m

The Xcel 2-Rotor Continuous Boring Miner is engineered for seamless integration into any mining operation.

Utilized in everything from initial development to producing ore in the largest of mine rooms, Prairie Machine’s Xcel 2-Rotor Continuous Boring Miner is an adaptable, efficient, and safe way to meet your site’s specific needs.

• The Xcel 32 is engineered to facilitate mine development and mine panel maintenance in sites with any spatial restrictions.
• The versatile Xcel 42 is MSHA-approved for safe operation in exceptionally hazardous mining environments.
• The mid-sized Xcel 52 is purpose built to meet the production needs of a conventional mine site.
• The Xcel 72A is Prairie Machine’s largest and most powerful Continuous Boring Miner to date and is equipped to handle the production needs of large-scale mining operations.

Series	Xcel 32	Xcel 42	Xcel 52	Xcel 72A
Number of Cutting Rotors	2	2	2	2
Cutting Rotor Motor Output	300 hp at 1,185 rpm	400 hp at 1,185 rpm	500 hp at 1,185 rpm	700 hp at 1,185 rpm
Cutting Rotor Motor Output	224 kW at 1,185 rpm	298 kW at 1,185 rpm	373 kW at 1,185 rpm	522 kW at 1,185 rpm
Tramming Speed	0 to 20 ft/min	0 to 20 ft/min	0 to 20 ft/min	0 to 20 ft/min
Tramming Speed	0 to 6 m/min	0 to 6 m/min	0 to 6 m/min	0 to 6 m/min
Cutting Profile Area	100 ft²	129 ft²	182 ft²	229 ft²
Cutting Profile Area	9.25 m²	12 m²	17 m²	21.25 m²
Maximum Cutting Width	14 ft	13 ft	18.25 ft	20 ft
Maximum Cutting Width	4.22 m	4.75 m	5.52 m	6 m
Maximum Cutting Height	8.25 ft	8 ft	11 ft	12 ft
Maximum Cutting Height	2.50 m	2.50 m	3.25 m	3.75 m
Tramming Height	7 ft	7.50 ft	9.50 ft	10.50 ft
Tramming Height	2 m	2.25 m	3 m	3.25 m

The custom Xcel Torque Limiter extends the lifespan of the trim chain drive system and reduces downtime brought on by unpredictable ground conditions. The Xcel Torque Limiter is a standard option on all Xcel Miners and can be retrofitted to any Continuous Boring Miner to protect the machine's trim chain, trim chain drive pinions, and associated trim chain system components from damage caused by extreme torque during operation.

Traditional machine safety systems, such as the shear pins, often suffer from a lack of reliability and consistency. When shear pins break too easily, sites will experience unnecessary downtime brought on by machine repair. When shear pins fail to break after being subjected to excessive torque, the Boring Miner's drive components can incur serious damage and can become a potential risk to the operator and surrounding mine personnel. A properly functioning shear pin system has its own set of limitations. Any time an overtorque event occurs, maintenance staff must replace the shear pins, putting them in a potentially hazardous situation. The Xcel Torque Limiter requires zero maintenance following an overtorque event, saving the downtime and inherent risk associated with machine maintenance.

The Xcel Torque Limiter is calibrated according to a custom-defined torque range and is integrated into the Continuous Boring Miner's programmable logic controller (PLC). Should the Boring Miner's cutting components be subjected to excessive force, the Xcel Torque Limiter automatically slips to stop the machine, reduce the load, and preserve vital machine components. The PLC alerts the operator of any slips to allow them to make operating adjustments as necessary.