Results 41 to 50 of about 1,504,519 (328)
Advances in Mechanical Engineering, 2023 During tunnel excavation using a tunnel boring machine (TBM), the interaction between the cutter and the rock causes the cutterhead to generate abrupt vibrations, which could lead to engineering problems, such as bearing seal failure and even cutterhead ...
Zhenxing Yang +5 more
semanticscholar +1 more source
Optimization of blasting parameters in opencast mines [PDF]
, 2007 Drilling and blasting are the major unit operations in opencast mining. Inspite of the best efforts to introduce mechanization in the opencast mines, blasting continue to dominate the production.
Parida, Chinmay Kumar, Rout, Manmit
core
A Brief History of the Development of Blasting and the Modern Theory of Rock Breaking [PDF]
, 2016 The article is devoted to the task today to improve the effectiveness of blasting during construction of horizontal and inclined mine excavations. Construction of new and reconstruction of existing mines requires large volume of excavation works, which ...
Kirsanov, A. K. (A) +2 more
core +2 more sources
Lessons Learned From a Delayed‐Start Trial of Modafinil for Freezing of Gait in Parkinson's Disease
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Freezing of gait (FOG) in people with Parkinson's disease (PwPD) is debilitating and has limited treatments. Modafinil modulates beta/gamma band activity in the pedunculopontine nucleus (PPN), like PPN deep brain stimulation. We therefore tested the hypothesis that Modafinil would improve FOG in PwPD.
Tuhin Virmani +8 more
wiley +1 more source
Influence of the position and depth of pre-cutting kerfs on the rock breaking by SBM cutter
Meitan xuebaoThe combination of water-jet and disc-cutter rock breaking is a key technology to improve the rock breaking efficiency of the full-face shaft boring machine and achieve the mechanized development of deep resources.
Renshu YANG +5 more
doaj +1 more source
Influences of Microwave Irradiation on Rock-Breaking Efficiency of a Reduced-Scale TBM Cutter
Applied Sciences, 2023 To explore the influences of microwave irradiation on the rock-breaking efficiency of tunnel boring machine (TBM) cutters, a multimode cavity with a microwave power of 2100 W was used to conduct microwave irradiation tests on Chifeng basalt for different
Gaoming Lu +4 more
semanticscholar +1 more source
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
Oakum picking in the twenty-first century [PDF]
, 2011 This paper deals with employability courses for young people who are not in education, employment or training. It critiques the nature of such training and draws comparisons between provision for NEET young people and that to which the poor were ...
Simmons, Robin
core
Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications
Advanced Functional Materials, EarlyView.Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai +8 more
wiley +1 more source
Study on Rock-Breaking Depth and Damage Area under Particle Jet Impact
Shock and Vibration, 2020 Particle jet impact drilling technology is an efficient method which mainly uses high-velocity particles to break rock. As the important criterion for evaluating rock-breaking effect, rock-breaking depth and damage area were studied in this paper ...
Fushen Ren, Tiancheng Fang, Xiaoze Cheng
doaj +1 more source