Study on Overburden Strata Movement Law in Coal Backfill Mining Face with Paste-Like Material
SHI Yong-kui
HAO Jian
SHANG Ya-ping
SUN Ting-ting
ZHAN Xiao-yuan
Abstract：In order to study the overburden strata movement law of a paste-like backfill coal mining face,a self-developed mine pressure sensor was applied to the mine strata pressure observation of No. 81006 paste-like backfill coal mining face in Caozhuang Mine. A distri-bution law of advance support pressure in No. 81006 coal mining face was obtained,including vertical stress within the backfilled mass and the roof and floor convergence value within the backfilled area. The results showed that an influence scope of the advance support pres-sure was about 10 m and a stress filed in front of the coal wall was in single elastic stress distribution. The max convergence value of the roof to floor within the backfilled area was about 104 mm and the compression ratio of the backfilled mass was 5.2%. After the stress gauge in the backfilled mass was in a stable state,the stress was 15.06 MPa and was close to the in-situ rock stress of 13.75 MPa. A roof con-nection effect of the backfilled mass was good and the backfill mass could support full weight of the overburden strata. After coal mining face was backfilled,the mine strata pressure behavior was weak,the overburden strata was sable and expected effect was reached.
Keywords：backfilled with paste-like materialoverburden strata movementsupport pressurebackfilled material touched with roof
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 5-7,36 )