Investigation into the effects of different rocks on rock cuttability by a V-type disc cutter

Balcı, Cemal; Tumaç, Deniz

doi:10.1016/j.tust.2012.02.018

Cited by 112 publications

(25 citation statements)

References 19 publications

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“…Furthermore, with the disk cutter rotating speed and disk cutter mounting radius jointly used to analyze characteristics of cutter force and cutter energy in the process of rock breaking, the same conclusion can be acquired as the literature 18,19 showed that using the finite element simulation software, with the increase in the rotational speed, the three directional forces also increase. 3.…”

Section: Resultsmentioning

confidence: 59%

“…19 These adopted cutter parameters and geological parameters are shown in Tables 3 and 4. Using linear cutting experiment, Balci and Tumac carried their work on V-type 380-mm-diameter disk cutter to record experimental data. Adopting these data, the comparison result has been listed in Table 5, and the difference in energy change is shown in Table 6, assuming that cutting straight line trajectory is 1 m.…”

Section: Comparative Analysis Of Experimental Data: Application Of Thmentioning

confidence: 99%

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Establishment of tunnel-boring machine disk cutter rock-breaking model from energy perspective

Song

Wei

Zhu

2015

Advances in Mechanical Engineering

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As the most important cutting tools during tunnel-boring machine tunneling construction process, V-type disk cutter's rock-breaking mechanism has been researched by many scholars all over the world. Adopting finite element method, this article focused on the interaction between V-type disk cutters and the intact rock to carry out microscopic parameter analysis methods: first, the stress model of rock breaking was established through V-type disk cutter motion trajectory analysis; second, based on the incremental theorem of the elastic-plastic theory, the strain model of the relative changes of rock displacement during breaking process was created. According to the principle of admissible work by energy method of the elastic-plastic theory to analyze energy transfer rules in the process of breaking rock, rock-breaking force of the V-type disk cutter could be regarded as the external force in the rock system. Finally, by taking the rock system as the reference object, the total potential energy equivalent model of rock system was derived to obtain the forces of the three directions acting on V-type disk cutter during the rock-breaking process. This derived model, which has been proved to be effective and scientific through comparisons with some original force models and by comparative analysis with experimental data, also initiates a new research strategy taking the view of the micro elastic-plastic theory to study the rock-breaking mechanism.

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Section: Resultsmentioning

confidence: 59%

Section: Comparative Analysis Of Experimental Data: Application Of Thmentioning

confidence: 99%

Establishment of tunnel-boring machine disk cutter rock-breaking model from energy perspective

Song

Wei

Zhu

2015

Advances in Mechanical Engineering

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“…V-type cutters are no longer used, except in special cases (Balci & Tumac, 2012), because of uneven wear of the cutter tips, which progressively changes the contact area with the rock. So they have been replaced with CCS disk cutters.…”

Section: Existing Methods For Estimating Cutting Forces For Disc Cuttersmentioning

confidence: 99%

“…The principal design and performance parameters of TBM are machine diameter, its power, torque, thrust, RPM of the cutterhead, cutter type and size, rock mass properties, and geological conditions (Balci & Tumac, 2012). The key issue for TBM excavation is to match the rock properties and the operational parameters of the machine (Zhao, Gong, & Eisensten, 2007).…”

Section: Introductionmentioning

confidence: 99%

Scale factors for conversion of forces on disc cutters for the main domestic and foreign methods

Zhabin¹,

Polyakov²,

Averin³

2017

Min. miner. depos.

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Purpose. Disc cutter is an important tool which is used in tunneling to destroy the rock during excavation as it directly influences rock-breaking efficiency, advance rate and economy of a project. Thus, it is of critical importance to have a reliable and accurate method for making predictions on cutting forces during rock destruction by disc cutters. Russian (including Soviet) research in the field is limited by studying small-diameter and/or wedge-shaped disc cutters which are not currently used. This paper is meant to coordinate domestic research by Baron and Glatman with the most widely used and fully accepted foreign theoretical and semi-empirical methods (by Roxborough and Phillips, Bilgin and Phillips, and Rostami and Ozdemir) that have proven accurate and reliable for TBM (tunnel boring machine) performance prediction.Methods. The analysis of methods includes a brief review, a series of numerical experiments, which were performed for disc cutters with diameters 160 and 483 mm, and a comparison with the use of graphs. Then by approximation of the data obtained in this way, we have derived formulas for converting values of cutting forces gained by foreign methods into the values suitable for the same conditions and the domestic method. Findings.The method by Baron and Glatman itself could not be used for TBM performance prediction and tunneling planning nowadays. The approach based on the scale factors could be used for correlating any of the represented methods. Scale factors depend on the depth of cut (DOC) for rolling forces or on DOC and disc cutter diameter for normal forces.Originality. The analysis has also shown that mutual arrangement of the graph lines for all figures remains unchanged. The invariance of the relative positioning and trends of the graph lines allowed to assume that it is possible to introduce scale factors which help to convert values from one method into the values of other methods. The scale factor, which enables to relate domestic method and the main foreign methods, is determined by consecutive division of the calculated values obtained via the method of Baron and Glatman by the values used in other considered methods. Practical implications.The results could be used in TBM designing and in tunneling projects.

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“…Based on the study of the evolution law of rock cracks and the crushing mechanism, a large number of scholars have conducted research on the influencing factors of the cutter load and the load prediction model. BALCI and TUMAC [6] carried out research on the influence of different rock constitution on the cutter load. JI et al [7] studied the influence of the disc cutter spacing on the jump break coefficients via indentation experiments with different cutter spaces.…”

Section: Introductionmentioning

confidence: 99%

Side force formation mechanism and change law of TBM center cutter

Xia

Tian

Tan

et al. 2016

J. Cent. South Univ.

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The center cutter of a hard rock tunnel boring machine (TBM) is installed on the cutterhead at a small radius and thus bears complex side force. Given this fact, the formation mechanism and change law of the side force suffered by the center cutter were studied. Based on the rock shear failure criterion in combination with the lateral rolling width, a model for predicting the average side force was set up. Besides, a numerical analysis model of the rock fragmentation of the center cutter was established, and the instantaneous load changing features were investigated. Results shows that the inner side of the center cutter can form lateral rolling annulus in rock during the rotary cutting process. The smaller the installation radius is, the greater the cutter side force will be. In a working condition, the side force of the innermost center cutter is 11.66 kN, while it decreases sharply when installation radius increases. Variation tends to be gentle when installation radius is larger than 500 mm, and the side force of the outermost center cutter is reduced to 0.74 kN.

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Investigation into the effects of different rocks on rock cuttability by a V-type disc cutter

Cited by 112 publications

References 19 publications

Establishment of tunnel-boring machine disk cutter rock-breaking model from energy perspective

Establishment of tunnel-boring machine disk cutter rock-breaking model from energy perspective

Scale factors for conversion of forces on disc cutters for the main domestic and foreign methods

Side force formation mechanism and change law of TBM center cutter

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