Course Objectives

• Concept on underground metal mining
• Concept on development and Stoping and Mine support

Learning Outcomes

• Students will be able to understand the concept of underground metal mining and all other operations that are concerned with the underground metal mining.

Course Syllabus

MODULE I

Introduction

Present status of Indian metal mining industry; Scope and limitations of underground mining.

PROJECT:
Present status of Indian metal mining industry

MODULE II

Development

Choice of level interval and back/block length; Shape, size, position, excavation and equipping of shaft station/plat, grizzly, ore/waste bin, main ore pass system, underground crushing and loading stations, underground chambers, sump and other subsidiary excavations; Arrangements for dumping into main ore pass; Underground crushing, loading and hoisting.
Cross cuts and drifts, their shape, size and position, review of excavation process, ground breaking, mucking, ventilation and support, track extension and car switching, Use of modern drilling and loading equipment in drifting, raises and winzes, their shape, size and position, excavation process, ground breaking, mucking, ventilation and support; Modern methods of raising – Alimak and Jora-lift raising, longhole method including vertical crater retreat method of raising; raise boring, systems and their details, modern methods of winzing, secondary breaking at grizzley, conventional and mechanized methods, waste handling systems in underground workings.

PROJECT:
Use of modern drilling and loading equipment in drifting, raises and winzes, their shape, size and position, excavation process, ground breaking, mucking, ventilation and support
modern methods of winzing, secondary breaking at grizzley, conventional and mechanized methods, waste handling systems in underground workings.

MODULE III

Stoping

Selection of stoping methods; Classification of stoping methods; Stoping of narrow ore bodies by underhand, overhand, breast, longhole and raise mining methods; Resuing; Mining of parallel veins; Room & pillar, sublevel, large diameter blast hole/DTH, cascade, shrinkage and vertical crater retreat methods, their applicability, stope layouts, stope preparation, ground breaking, mucking, ventilation and supporting; Haulage and dumping; Supported methods – horizontal overhand and underhand cutand-fill methods, square-set method and its variations, details of stope layouts, ground breaking, supporting, mucking, ventilation, haulage and dumping.

PROJECT:
Selection of stoping methods

MODULE IV

Mine supports

REFERENCES

Ramlu et al, Computer in mineral industry. Pub: Oxford & IBH, New-Delhi.
Elements of mining technology by D.J.Deshmukh
W.A. Hustrulid. Underground mining methods handbook, Pub: Society of mining
engineers of the American Institute of Mining Metallurgical and Petroleum Engineers,
Inc. New-York.

Session Plan

Session 1

LECTURE:
Present status of Indian metal mining industry; Scope and limitations of underground mining..

WEB-LINKS:
https://www.slideshare.net/ranjeetiitkgp/lectures-on-metal-mining

PROJECT:
PRESENTATION BY INDIVIDUALS
Present status of Indian metal mining industry

Session 2

LECTURE:
Choice of level interval and back/block length; Shape, size, position, excavation and equipping of shaft station/plat, grizzly, ore/waste bin, main ore pass system, underground crushing and loading stations, underground chambers, sump and other subsidiary excavations; Arrangements for dumping into main ore pass; Underground crushing, loading and hoisting.

WEB-LINKS:

Session 3

LECTURE:
Choice of level interval and back/block length; Shape, size, position, excavation and equipping of shaft station/plat, grizzly, ore/waste bin, main ore pass system, underground crushing and loading stations, underground chambers, sump and other subsidiary excavations; Arrangements for dumping into main ore pass; Underground crushing, loading and hoisting.

WEB-LINKS:

Session 4

LECTURE:
Choice of level interval and back/block length; Shape, size, position, excavation and equipping of shaft station/plat, grizzly, ore/waste bin, main ore pass system, underground crushing and loading stations, underground chambers, sump and other subsidiary excavations; Arrangements for dumping into main ore pass; Underground crushing, loading and hoisting.

WEB-LINKS:

Session 5

LECTURE:
Choice of level interval and back/block length; Shape, size, position, excavation and equipping of shaft station/plat, grizzly, ore/waste bin, main ore pass system, underground crushing and loading stations, underground chambers, sump and other subsidiary excavations; Arrangements for dumping into main ore pass; Underground crushing, loading and hoisting.

WEB-LINKS:

Session 6

PROJECT:
PRESENTATION BY INDIVIDUALS
Use of modern drilling and loading equipment in drifting, raises and winzes, their shape, size and position, excavation process, ground breaking, mucking, ventilation and support

Session 7

LECTURE:
Cross cuts and drifts, their shape, size and position, review of excavation process, ground breaking, mucking, ventilation and support, track extension and car switching

WEB-LINKS:

Session 8

LECTURE:
Cross cuts and drifts, their shape, size and position, review of excavation process, ground breaking, mucking, ventilation and support, track extension and car switching

WEB-LINKS:

Session 9

PROJECT:
Use of modern drilling and loading equipment in drifting, raises and winzes, their shape, size and position, excavation process, ground breaking, mucking, ventilation and support

WEB-LINKS:

Session 10

LECTURE:
Modern methods of raising – Alimak and Jora-lift raising, longhole method including vertical crater retreat method of raising; raise boring, systems and their details, modern methods of winzing, secondary breaking at grizzley, conventional and mechanized methods, waste handling systems in underground workings.

WEB-LINKS:

Session 11

LECTURE:
Modern methods of raising – Alimak and Jora-lift raising, longhole method including vertical crater retreat method of raising; raise boring, systems and their details, modern methods of winzing, secondary breaking at grizzley, conventional and mechanized methods, waste handling systems in underground workings.

WEB-LINKS:

Session 12

LECTURE:
Modern methods of raising – Alimak and Jora-lift raising, longhole method including vertical crater retreat method of raising; raise boring, systems and their details, modern methods of winzing, secondary breaking at grizzley, conventional and mechanized methods, waste handling systems in underground workings.

WEB-LINKS:

Session 13

LECTURE:
Modern methods of raising – Alimak and Jora-lift raising, longhole method including vertical crater retreat method of raising; raise boring, systems and their details, modern methods of winzing, secondary breaking at grizzley, conventional and mechanized methods, waste handling systems in underground workings.

WEB-LINKS:

Session 14

PROJECT:
PRESENTATION BY GROUP
modern methods of winzing, secondary breaking at grizzley, conventional and mechanized methods, waste handling systems in underground workings.

WEB-LINKS:

Session 15

LECTURE:
Selection of stoping methods; Classification of stoping methods

WEB-LINKS:

Session 16

Stoping of narrow ore bodies by underhand, overhand, breast, longhole and raise mining methods; Resuing; Mining of parallel veins

LECTURE:

WEB-LINKS:

Session 17

LECTURE:
Stoping of narrow ore bodies by underhand, overhand, breast, longhole and raise mining methods; Resuing; Mining of parallel veins

LECTURE:

Session 18

LECTURE:
Stoping of narrow ore bodies by underhand, overhand, breast, longhole and raise mining methods; Resuing; Mining of parallel veins

WEBLINKS:

Session 19

LECTURE:
Room & pillar, sublevel, large diameter blast hole/DTH, cascade, shrinkage and vertical crater retreat methods, their applicability

WEB-LINKS:

Session 20

LECTURE:
stope layouts, stope preparation, ground breaking, mucking, ventilation and supporting; Haulage and dumping

WEB-LINKS:

Session 21

LECTURE:
Supported methods – horizontal overhand and underhand cutand-fill methods, square-set method and its variations, details of stope layouts, ground breaking, supporting, mucking, ventilation, haulage and dumping.

WEB-LINKS:

Session 22

LECTURE:
Supported methods – horizontal overhand and underhand cutand-fill methods, square-set method and its variations, details of stope layouts, ground breaking, supporting, mucking, ventilation, haulage and dumping.

WEB-LINKS:

Session 23

PROJECT:
Selection of stoping methods

WEB-LINKS:

Session 24

LECTURE:
Timber support: Post, drift-set of various types, square-set, crib-set, cog, stull and chock/chock mat supports

WEB-LINKS:

Session 25

LECTRE:
fore poling/piling; load bearing capacity of timber supports; bulkheads.

WEB-LINKS:

Session 26

LECTURE:
steel support: steel set, rigid and yielding types, tubbing, wire mesh, steel lining, screw jacks and ratchet jacks; improvised steel props, friction props, hydraulic props; link bars and chocks, powered supports.
PROJECT:

Support selection

WEB-LINKS:

Session 27

LECTURE:
Poured monolithic and reinforced concrete lining; monolithic pump packing, concrete blocks, concrete slabs, geniting and shotcreting.

WEB-LINKS:

Session 28

LECTURE:
Rock support: Pillars of ore and waste, pack walls, masonry, walls and arches, building materials and construction

WEB-LINKS:

Session 29

LECTURE:
fill support : materials of backfill and their procurement; theoretical aspects of slurry transportation; preparation, transport and placement of hydraulic backfill with and without cement

WEB-LINKS:

Session 30

LECTURE:
Paste fills; rock and concrete fills; surface arrangement for storage and mixing; pneumatic and mechanical methods of backfilling.

Session 31

Materials and techniques; rock bolts and dowels – different types and uses; mechanics of bolting; point anchored rockbolts – Slot and wedge type, expansion shell type, grouted point anchor type.

PROJECT:
PRESENTATION BY INDIVIDUAL
methods of backfilling

Case Studies