TEREX SHM SURFACE MINING SYSTEM OVERVIEW
Experience higher coal recovery with lower surface mining operating costs.
Terex SHM is a self contained, highly productive, cost efficient coal mining system. Designed with safety in mind, the system is operated and maintained exclusively on the surface, and at no time does any crew-member go underground, thereby providing a very safe work environment.
Terex SHM is also the first practical surface mining system that can mine parallel entries to predetermined depths. Like an auger mining systems the Terex SHM works before a highwall.  However, unlike auger mining systems, the Terex SHM mines parallel entries, rectangular in section and up to 1000 feet or 305 meters deep.
This superior surface mining system yields the following benefits:
- High Annual Capacity
- Lower Per Ton Reclamation Costs
- Higher Coal Recovery
- Lower Total Costs
- Minimal Out of Seam Ash Dilution
Terex SHM is generally operated from a bench that is created by the removal of overburden material and coal by way of contour surface mining around the perimeter of a coal seam. Other highwall applications include previously augered areas and trench mining.
In a contour surface mining application, a minimum bench width of forty-two feet is required, with fifty-five feet or more being ideal. The configuration of the Terex SHM is such that it is capable of surface mining coal seams ranging from thirty inches to sixteen feet in thickness and to depths of up to one thousand feet. The ability to mine this range of coal seam heights is accomplished by fitting interchangeable cuttterhead modules to the Terex SHM for low, medium, or high seam mining applications.
Main Component Descriptions:
When preparing to surface mine, the Terex SHM highwall miner, which is mobile at the mining location by way of four hydraulically powered tracks, is aligned perpendicular to the coal face exposed by the surface mining operation. As surface mining begins, the coal is cut by a specially designed electric cutterhead module, of which several modules are available to match the seam conditions.
The cutterhead is attached to the powerhead assembly located in the center of the machine. Here, two hydraulically powered sump cylinders with a twenty-foot stroke push the powerhead forward as they provide up to 380,000 pounds of force. Cutterhead modules are available with 24" to 44" diameter cylindrical drums, containing carbide-cutting bits. The bits rotate breaking the coal out of the seam. As the coal falls, it is gathered in a pan that uses two mechanical loading arms to assist in gathering the coal and propel it to the rear of the pan where it is picked up by a chain conveyor.
Near the mid point of the cutterhead, the chain conveyor loads the coal into a pair of 18" diameter horizontal augers which transports the coal through the remainder of the cutterhead. The horizontal augers are located inside of the powerhead and each are powered by 400 H.P. water-cooled electric motors located on the rear of the powerhead.
This system has become a proven asset to the surface mining operators that utilize to Terex SHM highwall miner. Contact the Terex SHM team to improve your coal recovery.
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