Results 11 to 20 of about 764,279 (193)
Aspects of energy requirements for rock drilling [PDF]
, 1974 Development of laboratory rock breakage techniques to relate energy and surface area produced by slow compression, drop hammer and stamp mill. A detailed study of laboratory rotary-percussive drilling in a wide range of rocks under different ...
Wootton, David
core +9 more sources
, 2022 Significant uncertainties remain regarding the field assessment of the peak shear strength of rock joints. These uncertainties mainly originate from the lack of a verified methodology that would permit prediction of rock joints’ peak shear strength ...
Ríos Bayona, Francisco, +3 more
core +2 more sources
Prediction Model of Drilling Performance for Percussive Rock Drilling Tool
Advances in Civil Engineering, 2020 This study suggests a method for quantitatively estimating the drilling performance of the down-the-hole (DTH) hammer during percussive drilling of rock surfaces. A pneumatic dynamic model of the DTH hammer was developed that considers the mass flow rate
Dae-Ji Kim +6 more
doaj +1 more source
Shock and Vibration, 2018 In the production and manufacturing process of hydraulic rock drill, there are small impact energy and low impact frequency, and a fault diagnosis method based on the internal mechanism testing and testing of the hydraulic rock drill is proposed.
Yelin Li, Youxin Luo, Xiao Wu
doaj +1 more source
Study on Monitoring Rock Burst through Drill Pipe Torque
Shock and Vibration, 2015 This paper presents a new method to identify the danger of rock burst from the response of drill pipe torque during drilling process to overcome many defects of the conventional volume of drilled coal rubble method.
Zhonghua Li +3 more
doaj +1 more source
Feasibility study of a hand guided robotic drill for cochleostomy [PDF]
, 2014 The concept of a hand guided robotic drill has been inspired by an automated, arm supported robotic drill recently applied in clinical practice to produce cochleostomies without penetrating the endosteum ready for inserting cochlear electrodes. The smart
Reid, Andrew +11 more
core +1 more source
Real-time adaptive filtering of dental drill noise using a digital signal processor [PDF]
, 2006 The application of noise reduction methods requires the integration of acoustics engineering and digital signal processing, which is well served by a mechatronic approach as described in this paper.
Kaymak, E +3 more
core +6 more sources
Drill Monitoring for Rock Mass Grouting : Case Study at the Stockholm Bypass
, 2021 In tunneling, rock mass grouting is a method applied to reduce water ingress. Grouting is influenced by rock mass conditions, especially apertures, frequency, and continuation of fracturing.
Schunnesson, Håkan, +3 more
core +1 more source
Research on the Matching of Impact Performance and Collision Coefficient of Hydraulic Rock Drill
Shock and Vibration, 2021 The stress wave produced by the piston impact, on the drill rod, is an important factor affecting impact performance. It is particularly important to control the stress waveform generated by the piston impact on the drill rod to meet the requirements of ...
Yelin Li
doaj +1 more source
A study on PDC drill bits quality [PDF]
, 2013 The quality of innovating PDC (Polycrystalline Diamond Compact) bits materials needs to be determined with accuracy by measuring cutting efficiency and wear rate, both related to the overall mechanical properties.
Gerbaud, Laurent +4 more
core +1 more source