Document Type
Conference Paper
Publication Date
2009
Abstract
Mining of coal alters the ground stressfields, causing strata deformation, ultimately leading to surface subsidence. For the past 40 years some significant experience on mine subsidence control technology has been acquired in China, particularly when mining under buildings, railways and water bodies, which are known as "3-bodies". Current emphasis is in the evaluation of appropriate mining methods and other correlative technologies that can control or reduce the ground surface subsidence and protect surface structures. The current status of coal mining subsidence and ground control technology in China are discussed, including partial mining, backfilling, bed separation grouting, and harmonic mining. The partial mining methods include; strip pillar mining, the room and pillar method, and limited mining thickness. The backfilling mining method uses the traditional backfill material, like gypsum, paste-filling, and so on. Bed separation grouting in overburden strata is a new and patented technique which can reduce the surface subsidence to some extent, and is used in some Chinese coalmines.
Publication Details
This conference paper was originally published as Guo, W, Zou, Y & Liu, Y, Current Status and Future Prospects of Mining Subsidence and Ground Control Technology in China, in Aziz, N (ed), Coal 2009: Coal Operators' Conference, University of Wollongong & the Australasian Institute of Mining and Metallurgy, 2009, 140-145.