Correlation of specific energy of cutting saws and drilling bits with rock brittleness and destruction energy

Atici, U.; Ersoy, A.

doi:10.1016/j.jmatprotec.2008.06.004

Cited by 91 publications

(33 citation statements)

References 6 publications

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“…10 through 13 describe the fitted curves for this relationship. Atici & Ersoy (2009) state that a good indication of the cutting performance can be assessed by analyzing the relationship between the specific energy of cutting and the cutting rate. When the lowest specific energy is associated to the highest cutting rate, then the most efficient condition is achieved.…”

Section: Resultsmentioning

confidence: 99%

Influence of Traverse Velocity and Pump Pressure on the Efficiency of Abrasive Waterjet for Rock Cutting

Arab¹,

Celestino²

2017

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Abstract. This paper presents investigations on the behavior of four types of rocks (syenite, granite, marble and sandstone) subjected to abrasive waterjet cutting. The influence of traverse velocity and pump pressure on the efficiency of cutting is analyzed. Moreover, the influence of the physical-mechanical behavior of the rocks on their removal process is investigated. It was found that, in general, the removed volume of rock and the cutting rate tend to increase with the decrease of traverse velocity and with the increase of pump pressure. Moreover, the opposite trend was observed in the analysis of the specific energy of cutting. Optimum conditions of cutting efficiency were found when cutting the studied rocks with a traverse velocity of 200 mm/min and a pump pressure of 400 MPa. Finally, the marble and the sandstone presented the lowest resistance to abrasive waterjet cutting while the syenite and granite presented the highest resistances.

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Section: Resultsmentioning

confidence: 99%

Influence of Traverse Velocity and Pump Pressure on the Efficiency of Abrasive Waterjet for Rock Cutting

Arab¹,

Celestino²

2017

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“…the rolling force (torque) and the axial force (thrust) of the disc cutter. When a TBM is in the operation, both the axial and the rolling force act on the machine during excavation [10].…”

Section: Concept Of Specific Energymentioning

confidence: 99%

“…Atici & Ersoy [10] estimated the effect of brittleness and destruction energy on SE. Zhang, et al [1] introduced a mechanical analysis of the shield excavating process into the nonlinear multiple regression of on-site data and achieved a diagnosis model of the specific energy.…”

Section: Introductionmentioning

confidence: 99%

Studying the Effect of Tunnel Depth Variation on the Specific Energy of TBM, Case Study: Karaj–Tehran (Iran) Water Conveyance Tunnel

Mirahmadi

Tabaei

Dehkordi

2016

J. Eng. Technol. Sci.

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The tunnel-boring machine (TBM) is a common piece of equipment used in tunneling projects. For planning a mechanical excavation project, prediction of TBM performance and the specification of design elements such as required forces are critical. The specific energy of excavation (SE), i.e. drilling energy consumption per unit volume of rock mass, is a crucial parameter for performance prediction of a TBM. In this study, the effect of variation of tunnel depth on SE by considering the post-failure behavior of rock mass was investigated. Several new relations between SE and tunnel depth are proposed according to the statistical analysis obtained from Karaj -Tehran Water Conveyance Tunnel real data. The results showed that there is a direct relation between both parameters and. Polynomial equations are proposed as the best expression of the correlation between these parameters.

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“…Thuro & Plinninger (1999) obtained very good results in the correlation of the specific destruction work and the cutting rate of roadheader bits. Atici & Ersoy (2009) also found good correlations between the property and the drilling rates of circular diamond saws and drilling bits.…”

Section: Correlations Between the Relative Kerf Generation Energy (E mentioning

confidence: 67%

“…According to Atici & Ersoy (2009) a good indication of the cutting performance of rocks is given in the study of the specific energy of cutting (SE C in the case of this thesis) and the cutting rate parameters. The cutting rate is defined as the removed volume of rock divided by the time spent on cutting, i.e.…”

Section: Efficiency Analysis Regarding Specific Energy Of Cutting Andmentioning

confidence: 99%

Rock cutting by abrasive water jet: an energy approach

Arab¹

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Abrasive waterjet (AWJ) cutting is a versatile technique which has been effectively applied to rock cutting since the late 1980s. The complexity of the interaction between the waterjet and the rocks complicates the thorough understanding of the phenomena involved in AWJ rock cutting. On one hand, rocks are complex materials which are generated through different processes in an uncontrolled environment without human interference. On the other hand, the AWJ acts with high velocity and turbulence, complicating direct observation and the perception of details. In this respect, the present research aims to contribute to the study of AWJ cutting applied to rocks, including the analysis of qualitative and quantitative information, both of great importance regarding the study of complex materials. Concerning quantitative data, special attention is given to the investigation of the cutting efficiency, which can be analyzed by observing conditions in which the higher cutting rate is associated with the minimum energy provided by the AWJ machine per removed volume of rock. Moreover, the real efficiency can be analyzed through the investigation of the conditions in which the major part of the energy provided by the AWJ machine is used effectively for rock cutting, deducting dissipation losses. The effects of varying traverse velocity and pump pressure on cutting parameters were also investigated, in addition to the influence of rock properties on the effective energy of cutting. The effective energy was calculated based both on the specific energy and specific destruction work of the materials. With respect to the qualitative investigation, petrographic and scanning electron microscopy (SEM) analyses were conducted in order to visualize and better understand the different effects of cutting on the studied rocks.Cutting tests with a traverse velocity of 200 mm/min and a pump pressure of 400 MPa presented the most efficient rock cutting regarding both methods of efficiency analysis. Dry density and tensile strength presented fair correlations with the effective cutting energy, while the modulus ratio presented the best correlations. It was observed that brittleness plays a key role in the understanding of the phenomena involved in AWJ rock cutting.

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Correlation of specific energy of cutting saws and drilling bits with rock brittleness and destruction energy

Cited by 91 publications

References 6 publications

Influence of Traverse Velocity and Pump Pressure on the Efficiency of Abrasive Waterjet for Rock Cutting

Influence of Traverse Velocity and Pump Pressure on the Efficiency of Abrasive Waterjet for Rock Cutting

Studying the Effect of Tunnel Depth Variation on the Specific Energy of TBM, Case Study: Karaj–Tehran (Iran) Water Conveyance Tunnel

Rock cutting by abrasive water jet: an energy approach

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