Rapid Construction and Support Technology of Large Span Open-off Cut for Fully Mechanized Caving Mining Face in Thick Seam of Deep Mine
Abstract：Abstract arge span 7 m wide open-off cut for fully mech- anized top coal caving mining face in thick seam of a deep mine, a new high pre-stressed bolt and anchor combined support method was applied, rational support parameters were selected and bolt and anchor of high strength and high prestress technique of the mine roadway was applied. The experiment results showed that the construction and support technology could effectively to control the deformation of the open-off cut, the roof subsidence value was less than 160 mm, the convergence between the two sidewalls of the gateway was less than 150 mm and the construction time was reduced by 50 days. Thus a rapid and safe construction was realized.
Keywords：large span open-off cutthick seamcombined supportrapid constructiondeep shaft
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 12-14,18 )