Results 31 to 40 of about 12,867 (296)
Shiyou jixie, 2021 The research on rock breaking mechanism of special-shaped non-planar PDC cutter is relatively scarce, and the research on domestic prismatic PDC cutter is even scarcer.
Wei Xiuyan +5 more
doaj
Applied Sciences, 2019 The low rock breaking efficiency of conventional polycrystalline diamond compact (PDC) bits in hard abrasive formations prompts the development of PDC cutting elements from the planar structure to the non-planar structure.
Jianxun Liu +4 more
doaj +1 more source
Using a high-pressure water jet-assisted tunnel boring machine to break rock
Advances in Mechanical Engineering, 2020 The concept of tunnel boring machine (TBM) disc cutter rock breaking coupled with high-pressure water jets has been proposed to overcome the difficulties that occur when TBMs encounter extremely hard rocks.
Jinliang Zhang +5 more
doaj +1 more source
Rock breaking methods to replace blasting
IOP Conference Series: Materials Science and Engineering, 2018 The method of breaking rock by blasting has a high efficiency and the cost is relatively low, but the associated vibration, flyrock, production of toxic gases since the 1970's, the Western developed countries began to study the safety of breaking rock. This paper introduces different methods and their progress to safely break rock.
Huisheng Zhou, Xinghua Xie, Yuqing Feng
openaire +1 more source
Experimental studies of the resultant contact forces in drillbit-rock interaction [PDF]
, 2014 Peer ...
Ajibose, Olusegun Kolawole +2 more
core +1 more source
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
Experimental Studies of Electrical Fields on a Breaking Rock Sample [PDF]
, 2001 When a rock sample is pressed by a force, the pressure on the crystal lattice generates an electrical field around the quart grains due to the piezoelectric effect.
Marone, Chris J. +3 more
core
Atomic‐Scale Light Coupling Control in Ultrathin Photonic Membranes
Advanced Functional Materials, EarlyView.Ultrathin photonic nanomembranes provide atomic‐scale control over the coupling between incident light and high‐Q photonic modes, enabling angstrom‐level resonance tuning and strong field confinement. When integrated with TMD monolayers, they further yield enhanced light–matter interactions, offering a versatile platform for advancing quantum photonics,
Chih‐Zong Deng +8 more
wiley +1 more source
Numerical Simulation Study on Characteristics of Tight Hard Sand Broken by Axe-shaped PDC Cutter
Shiyou jixie, 2021 The study on the specific rock breaking mechanism of axe-shaped PDC cutter in the existing literatures is relatively less, the rock breaking characteristic test data are mostly for field application data, and there is short of theoretical basis of tooth ...
Zhao Runqi +5 more
doaj
Analysis of operation parameters of partial backfilling in the context of selective coal mining [PDF]
, 2019 Purpose is to determine factors of effect of mechanical parameters and geometry of packs, constructed using the undercut rocks in the process of selective coal mining, on the state of geomechanical system within a mine working-stope junction during a ...
Dereviahina, N, Malanchuk, L, Sotskov, V
core +1 more source