Effect of the rock properties on sawability of granite using diamond wire saw in natural stone quarries
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ORIGINAL PAPER
Effect of the rock properties on sawability of granite using diamond wire saw in natural stone quarries Sohan Singh Rajpurohit 1 & Rabindra Kumar Sinha 1
&
Phalguni Sen 1 & Vedanta Adak 2
Received: 30 June 2020 / Accepted: 15 October 2020 # Saudi Society for Geosciences 2020
Abstract Sawability of diamond wire saw is a cost-sensitive parameter in natural stone quarries that affects directly the production planning and equipment selection. The present study intended to investigate the effect of rock properties on sawability of diamond wire saw in granite quarries by considering the cutting rate and unit wear as the main sawability criteria. Hourly cutting rate of stone and unit wear of diamond impregnated beads of diamond wire saw were measured during the stone sawing process in 9 granite quarries. Moreover, physico-mechanical rock properties were determined in the laboratory. Statistical regression models were built to quantitatively analyze the effect of individual rock property on the cutting rate and unit wear. Further, the principal component analysis (PCA) and best subset regression with Bayesian information criterion (BIC) were performed in order to determine the combined effect of most influential rock properties on sawability. Valid for all tested granites, the experimental results indicated that the tensile strength, abrasivity, and brittleness are the most influential rock properties for the prediction of stone cutting rate, whereas compressive strength, elasticity, and abrasivity are dominant for prediction of unit wear of diamond beads. Keywords Natural stone . Granite . Diamond wire saw . Wear . Cutting rate . Sawability . Rock properties
Introduction Granite is one of the hard rock natural building stones that is popular for its esthetics, varieties of shades and textures, and high durability against external weathering (Aydin et al. 2013). It is produced in the form of raw cuboidal blocks from the stone quarries and sent to the processing plants to manufacture the final usable products such as slabs, modular tiles, decorative artifacts, or monumental artworks (Bayram 2012). Diamond wire saw machine (Fig. 1) is extensively used in dimension stone quarries to cut the raw blocks from the in situ rock mass. It cuts the stone workpiece using a rotating diamond wire comprising of a stranded steel rope over which Responsible Editor: Zeynal Abiddin Erguler * Rabindra Kumar Sinha [email protected] 1
Department of Mining Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India
2
Department of Applied Geology, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India
synthetic diamond beads are attached. The beads act as the cutting media in the process of rock sawing (Ozcelik and Yilmazkaya 2011). Hard and abrasive rocks such as granite are difficult to cut, and the rate of tool wear is significantly high compared to other rock types (Gunes Yilmaz et al. 2011). The primary challenge for the stone production industry is to incre
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