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Underground Stoping Methods
- 1. / Presentation on Topics:- • Introduction to underground metalliferous stoping method. • Brief Description of underhand and overhand stoping method. Date- 23/12/2021
- 2. Presented By:- Uddesh Kr. Bhagat & Reeshav Pathak Contents • What is stoping? • Factors for the choice of method of Stoping • Classification of method of Stoping • Open stopes • Overhand stoping • Underhand stoping • References
- 3. What is stoping? Stoping is mainly used in metal mines, In which we extract an ore body that has already been developed.
- 5. Factors for the choice of method of Stoping:- • Shape of the deposit. • Size of the deposit. • Strength of the ore deposit. • Character of the walls. • Geological structure of the deposit.
- 6. Classification of stoping methods. There are mainly four types of methods of stoping that are given below:- 1. Naturally supported Stopes. 2. Artificially supported Stopes. 3. Caved Stopes. 4. Combination of supported and Caved Stopes.
- 7. OPEN STOPES:- • Part of naturally supported stopes • No filling is used to support walls • Both wall rocks and the ore should be strong • If it will not be strong the roof will fall • Strong ore and walls permits us to do drilling, loading and hauling. • Open stopes is further divided into:- 1. Overhand stoping 2. Underhand stoping 3. Breast stoping
- 8. Overhand stoping:- • We proceeds from lower main level towards the upper main level (i.e; RAISE) • The ore is extracted in steps like benches by the help of drilling and blasting • Ore body should be strong • Inclination > 40 degree to 90 degree • Thickness is upto 4-5 m.
- 11. Underhand stoping:- • We proceeds from upper main level to the lower main level (i.e; WINZE) • Ore body should be strong • Inclination > 45 degree to 85 degree. • Thickness is not more than 1.5 m.
- 14. References:- • D.J Deshmukh (Volume 2) • Wikipedia • https://youtu.be/jhFObbzpx2s • https://youtu.be/yy6T4n2d8ac • https://www.slideshare.net/tayyabanwar180/underground-mining-method • Mining Mafia (youtube Channel)