The Selection and Rational Evaluation of Surface Mining Technology System

Liu, Shan-yi; Zi-ling, Song; Tong, Wei

doi:10.1007/978-3-642-15660-1_78

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…So the surface mining method is adopted prior in main coal production countries of the world, such as Germany, Australia, US, India, Russia and South Africa. According to the statistical data, about two thirds of the world coal production is from surface mining in last 40 years [1][2] . In the last decade, surface mining technology in China also has had a rapid development, the number of surface mines with over 10 Mt production capacity is more than twenty until now, and the output of surface mines has reached 10.8% of the total output of raw coal in 2011, as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Extraction Technology and Pillar Design Analysis of End-Wall Mining System in China

2017

International Journal of Mining Science

View full text Add to dashboard Cite

A great deal of coal will be left under the final end-walls in Chinese open pit mines because of lower slope angle in shovel-truck mining technology system and larger mining depth. In traditional surface mining system, the coal under the end-walls will be buried by the inner dumping site, and coal resources are normally discarded. Considering these situations, this paper describes end-wall mining system to recover the residual coal based on the geological conditions of coal seams at Chinese open pit coal mines. The mining system can improve economic benefits by exploiting haulage and ventilation roadways from the exposed position of coal seams, and utilizing the existing transportation systems. In order to investigate the pillar design methodology in end-wall mining system, several empirical formulas and methods were discussed based on the actual geological mechanics properties of coal and rock in Chinese open pit mine. The outcome shows that the coal pillar width calculated by Salamon formula may serve as an important reference for pillar design in end-wall mining system According to the theoretical and numerical simulation results, endwall mining system can increase the coal recovery from residual coal resources around end-wall and reduce the effect of underground mining operation on slope stability.

show abstract

Section: Introductionmentioning

confidence: 99%