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 ?
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.
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 carriage of materials from nearest distt store to working faces of kcn 3 district in seam c at kurja ug mine
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