Review of Current and Expected Underground Coal Mining Methods and an Evaluation of the Best Practices Associated with These
Review of underground coal production systems in South Africa set against practice in Australia, China and the United States, with guidance on equipment choice and section planning.
by André William Dougall | 2010
South African underground sections average about 60 000 t a month, against 130 000 to 160 000 t for single pass bolter miner units on continuous haulage, while the better sections target 1.4 to 1.6 Mt a year. Australian longwalls deliver 5 to 7 Mt a year from one face, compared with 3 to 5 Mt at the two local wall operations.
R1500,00
Description
Related Products
Underground Trials of Seismic-counter and Goafing Characteristics in Pillar Extraction
2003
Underground trials at South African collieries of a seismic early warning instrument first developed for an Australian longwall, with analysis of how roof layers fail during pillar extraction.
What this report foundA stand-alone device was built that detects micro-seismicity within 100 m of the roof and raises an alarm when preset thresholds are exceeded, giving early...
R1500,00
A stand-alone device was built that detects micro-seismicity within 100 m of the roof and raises an alarm when preset thresholds are exceeded, giving early warning of goafing. Input parameters proved not to vary with geotechnical setting. Man-made noise triggering false alarms remained the main obstacle, addressed by signal conditioning and sensor placement.
Developing a Mechanised Cleaning System – for Cleaning Under and Around Moving Conveyors
2013
Follow on review of mechanised conveyor cleaning equipment close to being usable underground, flameproof and not, written to help the coal industry agree which options to develop.
What this report foundNo flameproof mechanised system for cleaning under and around moving conveyors was found to exist anywhere.
R1500,00
No flameproof mechanised system for cleaning under and around moving conveyors was found to exist anywhere. Of more than 200 mini machinery manufacturers identified worldwide, few build for mining, and only one or two products were near ready for surface use. Manufacturer interest in mining applications has since risen, but the industry has not settled on which technology to back.
Benefits of an Apiary at a Rehabilitation Site
2019
Desktop study based on literature, a stakeholder workshop and specialist consultation, assessing whether keeping bees on rehabilitating mine land pays, for closure teams weighing aftercare options.
What this report foundThe financial benefit of bees to a rehabilitating site could not be modelled with confidence, and a field trial to show direct benefit is hard to configure...
R1500,00
The financial benefit of bees to a rehabilitating site could not be modelled with confidence, and a field trial to show direct benefit is hard to configure because so many variables affect rehabilitation. Apiaries suit sites where bee friendly plants are established, the return coming through honey yield rather than measured gains in biodiversity or ground cover, at low establishment cost.