At present, three types of coal mining technologies prevail in China, and our company, SSIT, can supply any type of these, based on the geological conditions and the requirements of the customer.
1. Blasting Coal Mining Technology The blasting technology is a coal mining process comprised of drilling & blasting, loading by hand or machine, as also conveying by a scraper conveyor.After the coal face is pushed forward,all the
Fig 1. Coal Face of Blasting Technology
procedures like moving and fixing the conveyor, supporting the coal face with wooden props, or metal frame as well as withdrawing the props for roof carving or filling, etc. are done manually.
Coal mining by blasting features simple technology and simple equipment, strong adaptability to complicated geological conditions. But it requires large labor force and very time taking for loading, moving and fixing the equipment manually.
2. Conventional Mechanized Mining Technology
It is a coal mining process which is assisted by a machine, during which moving and fixing the conveyor is done by a hydraulic jack; support and withdrawal of the props for roof carving or filling are done manually. Compared with the blasting method, coal mining by this method will not only greatly simplify the coal production, reduce labor intensity but also increase the unit output of the coal face.
Figure on the right shows the equipment and its arrangement for conventional mechanized mining.
1. MDY-150 shearer
2. SGB-630/150 flexile chain conveyor
3. DZ-22 single hydraulic prop
4. HDJA-1000 articulated beam
5. Jack of pushing conveyor
6. Belt conveyor in the gallery
Fig 2. Conventional Mechanized Mining Equipment and its Arrangement
3. Fully Mechanized Coal Mining Technology
In this coal mining technology, all the processes like coal cutting or dropping, loading, conveying, roof support and control are fully mechanized. Equipment in the full-mechanized coal face includes drum shearer, chain conveyor, hydraulic self-moving roof support and some other auxiliaries. In the transportation gallery, there is a scrape loader and an extendable belt conveyor; in the ventilation roadway, there is also a mono-rail or a double-rail flat mine car to transport materials and equipment, etc.
For the fully mechanized equipment, refer to the figure on the right.
Fig 3. Fully-mechanized Mining Equipment and its Arrangement
1.winch 2. water pump 3. power distribution point 4.transformer for lighting of drill 5. coal face conveyor 6. hydrulic roof support 7. shearer 8. scrape loader 9. belt conveyor 10. movable substation 11. hydraulic pump station 12. swapping winch
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