What is Sand Stowing ? Types of Stowing with Digram | Underground Sand Stowing | Stowing In Mining.

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In This Video We Are Going To Explain You About METHOD OF SAND STOWING
Stowing is a method in which the goaf is completely packed with incombustible material like sand or fly ash etc. and is generally practiced where it is necessary to keep the surface and strata above the seam intact. Sand-stowing was practiced for the first time in the United States.
Method of Sand Stowing -
Hand packing :-dumping it with baskets with the help of human labour as in hand packing.
Hydraulic stowing :-Transporting the material with water in pipes and allowing the water to percolate through bamboo matting or similar perforated barricade erected at site. This process is known as hydraulic stowing.
This process is widely used in India in those collieries which are situated within 16 km of rivers giving plentiful supplies of sand, the commonest stowing material in our mines.
The following factors have made stowing possible in many Indian mines:-
1) Availability of sand from rivers flowing near the collieries within 16 km.
2) Roof and floor of seams are not affected by water.
3) Seams not being very deep, humidity is not a major problem.
4) Mines are usually at depths exceeding 100 m and the seams are inclined. Hydraulic sand stowing is not successful where the seam is at a low depth from the surface and is flatter than 50.
From the stage of collecting sand at river end till the sand is packed in the goaf, the following operations are necessary:-
1) Gathering of sand at the river bed.
2) Transport of sand from river end to the bunkers on surface at the colliery.
3) Transport of sand hydraulically from the bunkers to the underground stowing site through pipes.
4) Stowing of the sand in the area from where coal has been extracted.
Mechanical stowing :-Throwing it with the help of a high speed belt conveyor as in mechanical stowing.
Pneumatic Stowing :- Introducing the material in a stream of compressed air as in pneumatic Stowing.
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Credit:-
Written & Voice By - Kanhaiya Lal
Edit By - Ritesh, Prince
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[@jayprakashyadav6420]

Very Good Sir

[@MiningVeins]

Many many thanks ❤️

[@Prince-04]

👌🏻

[@sandy8871]

Thank you sir 😊 Sir next video kab ayega

[@usmanmia5812]

What is the ratio of water and sand in hydraulic stowing

[@MiningVeins]

Sand Water Ratio By Volume 1:1.5 generally it is 935 liters of water per tonne of sand.