Murthy, V.M.S.R. (1992) Abrasivity of Indian Coals - an Assessment. Indian Mining & Engineering Journal , 31 (8). pp. 21-31. ISSN 0019-5944

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The performance of any coal wining machine is influenced by a panoply of variables may it be controllable or uncontrollable in nature. The cutting performance of any tool in particular, is governed by various factors such as strength of rock, RQD, fracture spacing, inclination of the bedding planes, insitu state of stress, abrasivity and design parameters of tool namely, width, cutting angle, clearance angle, rake angle and composition of tool etc. This paper synthesizes the experience gained while studying the cutting performance of shearer into a workable classification known as RAR (Rock Abrasivity Rating), that can help select a feasible cutting system. Assessment of abrasivity and its effect on the performance of cutting tool are brought out. The results of abrasivity studies at the various longwall sites in India viz., VK7, JK5, GDK9 of Singareni Collieries, Dhemomain of ECL and Moonidiah of BCCL susidaries of Coal India Ltd. using an equipment designed and fabricated at Indian School of Mines, Dhanbad known as ISMAT Index are presented and a comparative study of various rock properties such as Rebound Number, Compressive Strenght and NCB Cone Indentor Index with ISMAT Index is also done with an aim to standardise it.

Item Type: Article
Subjects: Blasting
Depositing User: Dr. Satyendra Kumar Singh
Date Deposited: 27 Jan 2012 04:32
Last Modified: 27 Jan 2012 04:32

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