STOWING

Hydraulic stowing can not effective in the case of flat and shallow seam,at this case hand packing preferable. Hydraulic stowing is used where the mines situated within the 15km.from the river.1.3tonne of sand required for one tone of coal extraction from vergin area.2.5 tones of sand is required for every tone of coal extraction from old working.1.8ton of sand is required for every tonne of coal extracted from depillaring.1.4te.of sand required for every tonne of coal in L/W asvancing.In the shaft the showing pipe is supported on stell pipe placed every 30 to 40mm.size For one tonne of sand required 1.5to2tones of water for stowing propose.For 1tone sand required 935 to 1100lit water for stowing propose.Explosed roof are not are more than80m square at working place in the stowing practice.In stowing mixing chamber provide kent velocity meter or v.notch or venturi meter for measurement of water and leo recorder is provied for sand measurement.