KPR Manually Controlled Roadheader
The first number of KPR roadheader is tested successfully at Bazhanova Mine (Makeyevugol State-Owned Enterprise). According to miners, who have already familiarized with the development in the form of an operating sample, KPR has a number of apparent advantages: the total weight of the machine and load on the swing drive (which is now 50% instead of traditional 70%) is reduced at the expense of design changes in the basic mechanisms' layout. This increases production rate of the machine without any reduction of operation safety and thus, allows reducing the prime cost.
- 1. The sizes of the roadway driven by one roadheader were increased as compared to 1GPKS from 4.7 to 5.1 m across the width and 4.05 to 4.6 m throughout the height.
- 2. Power consumption of the cutting head is increased from 55 to 75 kW.
- 3. It is possible to install two types of operating member's electric motors: 75 kW (1,500 rpm) and 55 kW (1,000 rpm). This allows extending the scope of roadheader application by broken rock hardness from 70 (1GPKS) to 80 MPa.
- 4. The minimum height of driven roadways is 2.2 m.
- 5. Loader represents a swinging (±20°) support stacking table with gathering arms. It provides high production output at loading area up to 4.04 m instead of 3.12 m in 1GPKS. Electric motors with capacity of 11 kW are used as drives. Gathering arms operate independently from each other and are kinematically uncopuled.
- 6. In case roadheaders have the same width (1,700 mm), the width of scraper conveyor is increased from 450 to 536 mm; the latter is reinforced by wear steel strips, which increase its life cycle 2-3 times. The conveyor drive is driven by an electric motor with capacity of 15 kW.
- 7. The roadheader chassis has a separate hydraulic drive, which provides high manoeuvrability and possibility to operate in inundated workings.
- 8. The hydraulic system of the roadheader is equipped with Parker suction filter, pressure filters with a built-in safety valve and non-destructed filtering element.
- 9. The availability of a supporting feeder and hydraulic prop increases the roadheader stability during rock breaking.
- 10. Convenience and simplicity of control, maintenance at the expense of rational layout of power packs and rigs.
- 11. The roadheader is controlled manually from a stationary control panel.
- 12. Control and diagnostics equipment controls and displays parameters of basic assemblies and components of the roadheader.