Results 51 to 60 of about 380,756 (310)
Meitan kexue jishuRapid excavation of hard rock tunnels was a crucial aspect in achieving intelligent and efficient coal mining. Cantilever roadheaders, TBMs, and bottom cutting equipment are all attempting to address this challenge.
Chao LI +4 more
doaj +1 more source
Fractal Characteristic of Rock Cutting Load Time Series
Discrete Dynamics in Nature and Society, 2014 A test-bed was developed to perform the rock cutting experiments under different cutting conditions. The fractal theory was adopted to investigate the fractal characteristic of cutting load time series and fragment size distribution in rock cutting.
Hongxiang Jiang +3 more
doaj +1 more source
Влияние технико-технологических особенностей режущей структуры породоразрушающего инструмента типа PDC на разрушение горной породы в процессе бурения скважин [PDF]
, 2017 Доля бурения скважин долотами PDC неуклонно растет, в настоящий момент процент использования породоразрушающего инструмента типа PDC для бурения скважин любого типа сложности составляет 95%.
Анисимов, Александр Владимирович
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Arthritis Care &Research, EarlyView.Objective Australian evidence on lived and care experiences of chronic musculoskeletal shoulder pain (CMSP), irrespective of disorder classification or disease, is limited. However, such evidence is important for person‐centered care and informing local service pathways and care guidelines or standards.
Sonia Ranelli +8 more
wiley +1 more source
Acoustic and physiological effects of the surroundings in rock cutting process [PDF]
, 2010 A noise effect arising in the rock cutting process is gaining a large attention as to the identification and optimization of the cuttingprocess. The sense experience acquired during the experiments in the process of rotary rock drilling related to the ...
František Krepelka +2 more
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Advanced Engineering Materials, EarlyView.This article describes the preparation and characterization of poly(ε‐caprolactone) electrospun composite fibers incorporating sol‐gel‐derived bioactive glass particles doped with B and Cu. Scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, Fourier‐transform infrared spectroscopy, contact angle, acellular bioactivity, mechanical and ...
Elisa Piatti +5 more
wiley +1 more source
Suitability of natural rocks as materials for cutting tools
SN Applied Sciences, 2021 This study presents an investigation of the usability and suitability of natural rocks as cutting tool materials. Therefore, indexable inserts are manufactured from eight different rocks and two mono minerals in this study and are used for turning of an ...
Berend Denkena +5 more
doaj +1 more source
Вплив форми армованої поверхні зубків озброєння шарошкових доліт на енергоємність руйнування гірської породи [PDF]
, 2013 Стаття присвячена проблемі підвищення ефективності роботи армованого твердим сплавом реліт озброєння шарошкових бурових доліт в процесі руйнування гірської породи.
Семеген, О. М.
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Nature and timing of Late Mississippian to Mid-Pennsylvanian glacio-eustatic sea-level changes of the Pennine Basin, UK [PDF]
, 2012 The Pennine Basin of northern England contains a comparatively complete Serpukhovian– Moscovian succession characterized by high-resolution ammonoid zonation and cyclic paralic sedimentation.
Condon, Daniel J., Waters, Colin N.
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Advanced Functional Materials, EarlyView.This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous
Mingfeng Xu +5 more
wiley +1 more source