JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives

Aims at detailed explanation of ground control practices in both

underground and open cast nines for extraction of coal and metal ore deposit.

Course Outcomes

Students aspiring for moiré detailed knowledge on ground control issues

related to underground and open cast mines can get adequate exposure to design of stable structures for safe mining in the future complex geomining situations

UNIT - I

Definition and concept of ground control in Mines. Ground control practice in Mines. Constraints on ground control design; characteristics of coal measure strata.

UNIT - II

Modern concept of strata pressure redistribution. Manifestation of strata pressure, convergence, load on prop, creep, heave, roof fall and facture systems due to mining. Insitu stress measurement, instrumentation.

UNIT - III

Roof support: Timber and steel supports, friction and hydraulic prop Arches, shotcret, roof truss, roof bolts. Cable bolts Powered supports stowing caving strip packing pump packing rock reinforcement.

UNIT - IV

Design of structures in rock; design of underground openings. Design of pillars, design of open pit slopes, waste dumps and embankments. Design of stopes.

UNIT - V

Subsidence: Theories of subsidence, factors affecting subsidence, prediction and measurement of subsidence. Damage and prevention of damage due to subsidence. Bumps and rock bursts-causes, occurrence and control.

TEXT BOOKS:

• 1. Obert & Duvall “Rock Mechanics and Design of structures in rock”
• 2. Peng “Coal Mining Ground Control”.

REFERENCE BOOKS:

• 1. Jaeger and cook “Fundamental of Rock Mechanics”
• 2. V. Singh & B.P. Khare “Rock Mechanics and Ground Control” B.TECH. MINING ENGG.