Design optimization of TBM disc cutters for different geological conditions [PDF]
, 2015 A novel optimization methodology for the disc cutter designs of tunnel boring machines (TBM) was presented. To fully understand the characteristics and performance of TBM cutters, a comprehensive list of performance parameters were investigated ...
Liu, Jingsheng, Xia, Yimin, Zhang, Kui
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Numerical Simulation of Rock Plate Cutting with Three Sides Fixed and One Side Free
Advances in Materials Science and Engineering, 2018 In order to overcome conical pick wear in the traditional rock cutting method, a new cutting method was proposed on account of increasing free surface of the rock.
Zhenguo Lu +4 more
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IEEE Access, 2020 Rock properties (e.g., brittleness, fracture toughness, hardness, compressive strength and tensile strength), cutting parameters (e.g., cutting depth, attack angle, wedge angle, cutting velocity) and confining stress are closely related to rock ...
Jiuqun Zou, Weihao Yang, Jihuan Han
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Preliminary assessment of roadheaders efficiency based on empirical methods and index of equivalent rock strength [PDF]
, 2019 Purpose. The choice of a proper roadheader is a critically important step in planning of a project or some of its stages. Nowadays various manufacturers produce numerous models of these vehicles, hence it is unreasonable to conduct a thorough analysis of
Averin, E +4 more
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A novel coal-rock cutting state identification model based on the Internet of Things
International Journal of Cognitive Computing in Engineering, 2023 The sudden change in the interface between coal-rock mass can lead to the increased abrasion of picks and the failure rate of mining machinery. The safe and efficient coal-rock identification technology is the key to realize the intelligent control of ...
Dong Song, Chitra Venugopal
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Cutting Characteristics of a Ductile Rock
GeoScience Engineering, 2020 A rock sample was obtained from an underground lignite mine for the investigation of the cutting characteristics of a ductile rock where the heading is achieved with a roadheader. The rock sample (metasiltstone) was classified according to a pertinent brittleness classification by means of its compressive strength to tensile strength ratio.
openaire +3 more sources
Study on the Improved Method of Wedge Cutting Blasting with Center Holes Detonated Subsequently
Energies, 2022 To acquire a satisfying cutting effect during medium-length hole blasting driving of rock tunnels, an improved wedge cutting blasting method with supplementary blasting of the center holes was proposed.
Bing Cheng +5 more
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State Dependent Delayed Drill-string Vibration : Theory, Experiments and New Model [PDF]
, 2017 L.J. Pei would like to acknowledge NNSF of China (No.
Kapitaniak, Marcin Tomasz +4 more
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Experimental study on coal rock recognition based on infrared thermal imaging and vibration signals
Gong-kuang zidonghuaIn response to the difficulties in practical application, susceptibility to signal interference, high cost, and complex implementation of existing coal rock recognition technologies, this paper theoretically analyzes the relationship between coal rock ...
LIU Zhixiang +3 more
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Investigation of the Cross-Cutting Polycrystalline Diamond Compact Bit Drilling Efficiency
Shock and Vibration, 2021 The parallel track scraping principle of conventional PDC bits largely limits the cutting efficiency and working life in deep formations. Cross-cutting polycrystalline diamond compact (PDC) bit may be an efficient drilling tool that increases the rock ...
Chun-Liang Zhang +5 more
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