Gallery

cross measure & inseam in longwall

Cross measure and inseam holes in longwall.

directional drilling

Directional drilling

directionaldrilling_valleylongwall

Directional drilling (Valley longwall)

1000 × 500

drainage_plan

Drainage Plan

gas drainage drilling in longwall face

Drainage Holes (Valley longwall)

gas metropolitan colliery

Gas drainage plan- Metropolitan colliery

gasdrainage1

Gas drainage

gasdrainage_stubs

Gas drainage holes from stubs in a gate roadway

inseam,cross measure drainage holes

Inseam cross measure drainage holes

inseam_gasdrainage

Inseam gas drainage setup

inseamborehole_valleylongwall

Inseam deviated boreholes (Valley longwall)

longholedrilling_valleylongwall

Longhole inseam drilling (Valley longwall)

hargraves emission meter thumbnail

Hargraves emission meter