Blog Standard – Page 3 – Mining Science and Technology

OVERVIEW

Change Out 0 Comment

A longwall change over generally takes 4 to 6 weeks. There is a need for forward planning and the use of critical path analysis is essential so as to prioritise the resources where they are needed. To prepare for a new longwall various tasks still need to be finished: Gas drainage of […]

BOLT CORROSION

Theories of Rock Bolting 0 Comment

Corrosion is a physical alteration of a material from electrochemical reaction with its environment that often results in reduction of the mechanical properties of that material. Rock bolts are particularly susceptible to corrosion as they can be exposed in their working environment to ground water. Corrosion increases markedly in sulphide […]

REFERENCES – Rock Bolting

Reference 0 Comment

Aydan, O. (1989). The stabilisation of rock engineering structures by rock bolts. Geotechnical Engineering. Nagoya, Nagoya University. Doctor of Philosophy. Aziz, N. I. (2004). Bolt surface profiles-an important parameter in load transfer capacity appraisal. Int. Symp. on Ground support, Perth, Western Australia, pp 221-231. Aziz, N. I., Jalalifar, H. and […]

EXTERNAL LINKS

Useful Links 0 Comment

PUBLICATIONS

Publication 0 Comment

PUBLICATIONS11th International Ground Control in Mining, Wollongong, 7-10 July 1992. Editors: Naj I. Aziz and Syd S. Peng Contents Paper 1 Assessment of Applicability of Stregnth Criteria for Rock and Rock Mass to Coal Pillars. Pages 1-8 V S Vutukuri and S M F Hossani, Univesity of NSW, Kensington, Australia. Paper [...] Read More

COMPLETED THESIS

Thesis 0 Comment

COMPLETED THESISDesign and Development of an Air Powered Venturi Scrubber for Longwall Dust Control, 1993- Balusu, SrinivasaRao. Title : Table of Contents Chapter 1 – Introduction Chapter 2 – Review Dust Control at Longwall Faces Chapter 3 – Parametric Studies of Dust Distribution Chapter 4 – Development of a New Prototype Scrubber Chapter 5 – Field [...] Read More

REFERENCES – Outburst

Reference 0 Comment

Ayruni, A. T. (1981). Theory and practice of mine gas control at deep mines, Nedra press, (Translated into English by Rockville, Maryland, USA), 355 p. Aluko, N. (2001). Coalbed methane extraction and utilisation, Technology status report 016 August 2001, Department of Trade and Industry, UK. pp http://www.dti.gov.uk/energy/coal/cfft/cct/pub/tsr016.pdf Ates, Y. and […]

INSTRUMENTATION

Ground Control 0 Comment

There are various methods and techniques available for in-situ testing of the underground rock mass. Some of the strata mechanics instrumentation that are used can be categorised as follows : Stress Measuring Instruments, It is not possible to directly determine the stress characteristics of rock but it can be evaluated […]

GROUND SUBSIDENCE

Ground Control 0 Comment

Surface subsidence will gradually form when coal is extracted over a wide area from a moderate to great depth of cover. The factors which influence subsidence include the height if the caved area over the extraction and the degree of bed separation within the overlying strata. The amount of subsidence […]

EFFECTIVE WIDTH OF CHAIN PILLARS

Ground Control 0 Comment

The effective width of a large rectangular chain pillar can be calculated by using either of the following formulae: weff = (w1 x w2)0.5 OR weff = 4A/C Where: w1 = width of one side of the chain pillar (metres) w2 = width of the other side of the chain pillar (metres) A = Area […]