Green Technique in Coal Mining

Abstract

The concept of green technique in coal mining was proposed. Its connotation and technical system were explained. The theory of the green technique in coal mining is the distribution behaviour of joints, fractures and bed separations, and the seepage flow behaviour of methane and water in the broken rock strata caused by the key strata break after mining. The main content of the green technique in coal mining includes water-preserved-mining, coal mining under building and bed separation grouting to reduce surface subsidence, particle extraction and backfill mining, simultaneous extraction of coal and coal-bed methane, coal mine roadway supporting, underground discharge of particle rock refuse and underground coal gasification. 9 refs., 5 figs., 1 tab.