advanced gallery

advanced gallery

[əd′vanst ′gal·rē]
(mining engineering)
A small heading driven in advance of the main tunnel in tunnel excavation.
References in periodicals archive ?
Tenders are invited for Supporting Of Roof Of Advanced Gallery By Manual Drill Of Holes,Jamming And Tightening The Roof Bolts With Bearing Plates W Straps Including Carrige Of Materials From Nearest Distt Store To Working Faces With In A Lead Of 50M In S 15 Panel In Seam -
Full Sectionalisation Stopping Of Brick Wall Filling Of Advanced Gallery With Incombustible Material (Sand) In The North Side Of 43L Of 39L(W) Dist.
Tenders are invited for Supporting Of Roof Of Advanced Gallery By Manual Drill Of Holes,Jamming Andtightening The Roof Bolts With Bearing Plates W Straps Including Carriage Ofmaterials From Nearest Distt.
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