Clinical value of a novel V-shaped annular suture under unilateral biportal endoscopy: a retrospective comparative study with the traditional I-shaped suture. [PDF]
J Orthop Surg ResLi A, Wang K, Xu X, Han J, Song R.
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Clinical and radiological comparison of percutaneous cervical nucleoplasty combined with ultrasound-guided pulsed radiofrequency of cervical nerve root for cervical radicular pain: a retrospective, matched-cohort study. [PDF]
Front Pain Res (Lausanne)Wang B +5 more
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Rake angle optimization for balanced efficiency and durability in PDC cutter cutting granite interaction via infrared thermal dynamics and fragmentation mechanism. [PDF]
Sci RepHe X +5 more
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Two new species of <i>Szelenyiopria</i> Fabritius (Hymenoptera, Diapriidae), larval koinobiont endoparasitoids of the leaf-cutter ant <i>Acromyrmex coronatus</i> (Fabricius) (Hymenoptera, Formicidae), from Panama. [PDF]
ZookeysAraúz G +7 more
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Abstract Disc cutters are used to cut the rocks in variable load conditions which results in cutter wear and failure. The wear of the cutter plays a vital role in the overall time cycle, efficiency and economics of tunneling projects. It changes the shape of the cutter, influences the cutting efficiency and has a detrimental effect on the annual cost
Anil Kumar Agrawal +1 more
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Studies on Rock-Breaking of Positive Disc Cutter and Edge Disc Cutter
Applied Mechanics and Materials, 2014Based on TBM disc cutter layout, a rock-breaking model of positive disc cutter and edge disc cutter is built. Sequential rock-breaking of the two cutters under different parameters is simulated; rock fragmentation, three-axis force and energy consumption are studied; optimal rock-breaking condition with different parameters is determined; feasibility ...
Kai Yang, Yi Min Xia, Yuan Wu
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Rock excavation by disc cutter
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1975Abstract Partial factorial experiments have been undertaken to study the effect of changing the principal geometrical variables on the performance of disc cutters operating in both the unrelieved and relieved cutting modes. A simple mathematical model is proposed which, on the evidence of the experimental data, is found to provide a good description
Frank F. Roxborough, Huw R. Phillips
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Factors Influencing Disc Cutter Wear
Geomechanics and Tunnelling, 2008AbstractDisc cutter wear in mechanised tunnelling has a strong influence on costs and performance in hard rock and soil materials. Wear is affected by several geological and technical factors. Several aspects have been considered in prediction models and case studies.
Christian Frenzel +2 more
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Layout design for disc cutters based on analysis of TBM cutter-head structure
Journal of Central South University, 2018Studies to date have failed to consider gage disc cutters’ variable cutting depth and the constraints of cutter-head welds, and have ignored the coupling mechanism between the profile of the full-face rock tunnel-boring machine (TBM) cutter-head and the assembled radius layout of the disc cutters.
Hong-yan Sun +4 more
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