Open-off Cut Support Technology of No.22801 Fully Mechanized Top CoalCaving Mining Face in Tanyaoyu Mine
YU Wei
Abstract：A designed length of an open-off cut applied to No.22801 fully mechanized top coal caving mining face in Tanyaoyu Mine was 155 m with a rectangular cross-section,a driving width of 9.0 m,a driving height of 3.4 m and a driving cross section area of 30.6 m2.According to the seam deposition status and geological conditions of the coal mining face,a combined support method with a bolt/steel band/steel mesh (cable)+combined anchors+hydraulic single props was provided and applied.The paper briefly introduced the construction technique,support method,support parameters and support quality requirements of the open-off cut.After the open-off cut was constructed,a mine strata pressure observation was conducted and the support results were excellent.The support technology would have the reference value to the large cross section fully mechanized top coal caving mining face with a high top coal thickness,easy bed separation of the roof,easy spalling of the two sidewalls and high strata pressure of the gateways.
Keywords：fully mechanized top coal caving mining faceopen-off cut supportbolt/steel band/steel meshcombined anchorhydraulic single prop
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 5-8 )