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Rock Mechanics and Rock Engineering

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17.03.2023 | Original Paper

An Experimental Study of Water Saturation Effect on Chipping Efficiency of a Chisel Pick in Cutting Some Low- and Medium-Strength Rocks

verfasst von: Hadi Bejari, Jafar Khademi Hamidi

Erschienen in: Rock Mechanics and Rock Engineering | Ausgabe 6/2023

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Abstract

Water saturation of rock plays an important role in chipping efficiency and productivity of mechanical excavators. In this study, small-scale linear rock-cutting experiments were performed with a chisel pick on five sandstones, four gypsums, and three synthetic specimens under dry and water-saturated conditions at cutting depths of 1, 3, and 5 mm in order to investigate the mechanical effect of water on the rock-cutting process. In addition, chipping efficiency and cutting particle size distribution in both dry and saturated rock conditions were investigated using sieving analysis and particle size distribution indices. In addition, a new indicator was introduced for evaluating chipping efficiency. Analysis on cutting test results showed that water saturation causes (1) a reduction of production capacity of chisel pick ranging from 1 to 35%, (2) a reduction of chip size and parameters of particle size distribution, and (3) an increase in the proportion of fines produced from rock cutting. The results showed that the reduction of chisel production capacity is greater in saturated rock samples with higher porosity and water content when compared to the same dry conditions. The results of the sieving analysis revealed that all the size parameters of rock debris are reduced in saturated conditions compared to dry conditions.

Vorheriger Artikel Numerical Investigation of Hydraulic Fracturing in a Heterogeneous Rock Mass Based on Peridynamics

Nächster Artikel Dynamic Strength and Indentation Hardness of a Hard Rock Treated by Microwave and the Influence on Excavation Rate

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Titel: An Experimental Study of Water Saturation Effect on Chipping Efficiency of a Chisel Pick in Cutting Some Low- and Medium-Strength Rocks
verfasst von: Hadi Bejari
Jafar Khademi Hamidi
Publikationsdatum: 17.03.2023
Verlag: Springer Vienna
Erschienen in: Rock Mechanics and Rock Engineering / Ausgabe 6/2023
Print ISSN: 0723-2632
Elektronische ISSN: 1434-453X
DOI: https://doi.org/10.1007/s00603-023-03267-6

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