The concept of specific energy in rock drilling
01 Mar 1965-International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts (Pergamon)-Vol. 2, Iss: 1, pp 57-73
TL;DR: In this article, the authors studied the relationship between the specific energy required to excavate a unit volume of rock and the crushing strength of the medium drilled in, for rotary, percussive-rotary and roller-bit drilling.
About: This article is published in International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts.The article was published on 1965-03-01. It has received 741 citations till now. The article focuses on the topics: Specific energy.
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Patent•
21 Jun 2002TL;DR: In this article, a method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation includes generating a geology characteristic of the formation per unit depth according to a prescribed geology model.
Abstract: A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation includes generating a geology characteristic of the formation per unit depth according to a prescribed geology model, obtaining specifications of proposed drilling equipment for use in the drilling of the well bore, and predicting a drilling mechanics in response to the specifications as a function of the geology characteristic per unit depth according to a prescribed drilling mechanics model. Responsive to a predicted drilling mechanics, a controller controls a parameter in the drilling of the well bore. The geology characteristic includes at least rock strength. The specifications include at least a bit specification of a recommended drill bit. Lastly, the predicted drilling mechanics include at least one of bit wear, mechanical efficiency, power, and operating parameters. A display is provided for generating a display of the geology characteristic and predicted drilling mechanics per unit depth, including either a display monitor or a printer.
342 citations
TL;DR: In this paper, a series of full-scale laboratory disc cutting tests was conducted with a single disc cutter (432 mm diameter and a constant cross-section profile) and a single rock type (a coarse-grained red granite).
278 citations
TL;DR: In this article, the penetration rate of percussive blast hole drill was measured in eight rock types at an open pit mine and three motorway sites and the penetration rates were correlated with the rock properties, including uniaxial compressive strength, Brazilian tensile strength, point load strength and Schmidt hammer value.
238 citations
Cites background from "The concept of specific energy in r..."
...The concept of specific energy was proposed by Teale [42] as a quick means of assessing rock drillability....
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Patent•
27 Jun 2003TL;DR: An iterative drilling simulation method and system for enhanced economic decision making includes obtaining characteristics of a rock column in a formation to be drilled, specifying characteristics of at least one drilling rig system; and iteratively simulating the drilling of a well bore in the formation.
Abstract: An iterative drilling simulation method and system for enhanced economic decision making includes obtaining characteristics of a rock column in a formation to be drilled, specifying characteristics of at least one drilling rig system; and iteratively simulating the drilling of a well bore in the formation. The method and system further produce an economic evaluation factor for each iteration of drilling simulation. Each iteration of drilling simulation is a function of the rock column and the characteristics of the at least one drilling rig system according to a prescribed drilling simulation model.
197 citations
TL;DR: In this article, a variety of five groups of rocks (16 types) were cut using three types of diamond circular saws at different feed rates and depths of cut (10, 30, 50, 70, 90 mm) and at a constant peripheral speed (65 m/s).
147 citations
References
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Book•
05 Oct 2000
TL;DR: Hardness measurements with conical and pyramidal indenters as mentioned in this paper have been used to measure the area of contact between solids and the hardness of ideal plastic metals. But they have not yet been applied to the case of spherical indenters.
Abstract: 1. Introduction 2. Hardness measurements by spherical indenters 3. Deformation and indentation of ideal plastic metals 4. Deformation of metals by spherical indenters. Ideal plastic metals 5. Deformation of metals by spherical indenters. Metals which work-harden 6. Deformation of metals by spherical indenters. 'Shallowing' and elastic 'recovery' 7. Hardness measurements with conical and pyramidal indenters 8. Dynamic or rebound hardness 9. Area of contact between solids Appendix I. Brinell hardness Appendix II. Meyer hardness Appendix III. Vickers hardness Appendix IV. Hardness conversion Appendix V. Hardness and ultimate tensile strength Appendix VI. Some typical hardness values
3,562 citations
Book•
01 Jan 1938
TL;DR: In this article, the theory of crushing and grinding in relation to present-day discoveries and developments and to consider the various mechanical appliances from a theoretical basis is discussed and discussed in detail.
Abstract: From introduction: "The purpose of this bulletin is to discuss the theory of crushing and grinding in relation to present-day discoveries and developments and to consider the various mechanical appliances from a theoretical basis."
160 citations