Results 1 to 10 of about 5,324 (160)

Application of Seismic Sensors in Measurement While Drilling [PDF]

Sensors
Rock geotechnical properties can be reflected in drill signals while drill rod penetrates through rocks. The rate of penetration, rotary speed, torque, load, sound, vibration, etc., are different for various rock types, since they are influenced by rock ...
Manoj Khanal, Tianzhu Duan, Yi Duan, Matt Van De Werken, Baotang Shen, Xing Li   +5 more
doaj   +2 more sources

Influence of Piston Mass and Working Pressure on the Impact Performance of a Hydraulic Rock Drill Using the Stress Wave Method

Machines, 2023
To optimize and improve the impact performance of a hydraulic rock drill, it is helpful to test the stress waves of the drill and analyze the impact energy, impact frequency, and energy utilization rate.
Guoyan Yu
exaly   +3 more sources

Numerical analysis on the drilling force of pneumatic impactors under different working conditions and structural parameters [PDF]

Scientific Reports
This study presents a numerical analysis of impact forces in down-hole hammer (DTH) using finite element method (FEM) and impact drilling dynamics theory.
Dongfang Li, Lianghuai Tong, Zengyang Huang, Xiaojie Xu, Sufen Wang, Jianhui Mao, Huiyi Zhu, Yujuan Deng, Xuyang Chen   +8 more
doaj   +2 more sources

Rock Drill Alignment

Measurement + Control, 1982
doaj   +2 more sources

Adaptation of the Winkie Drill for subglacial bedrock sampling

Annals of Glaciology, 2021
The Winkie Drill is an agile, commercially available rock coring system. The U.S. Ice Drilling Program has modified a Winkie Drill for subglacial rock and ice/rock interface coring, as well as drilling and coring access holes through ice.
Grant V. Boeckmann, Chris J. Gibson, Tanner W. Kuhl, Elliot Moravec, Jay A. Johnson, Zack Meulemans, Kristina Slawny   +6 more
doaj   +1 more source

Numerical Simulations and Experiments on Single-Tooth Rock-Breaking

Machines, 2022
The rock-breaking efficiency of a drilling tool directly affects the production costs and progress of foundation construction. It is essential to understand the mechanism of mechanical rock-breaking to improve rock-breaking efficiency.
Heyuqiu Li, Jie Wang, Qi Mei, Kunlan Huang, Qingyi Luo, Jie Dong   +5 more
doaj   +1 more source

One-Dimensional Convolutional Neural Network for Drill Bit Failure Detection in Rotary Percussion Drilling

Mining, 2021
Drill bit failure is a prominent concern in the drilling process of any mine, as it can lead to increased mining costs. Over the years, the detection of drill bit failure has been based on the operator’s skills and experience, which are subjective and ...
Lesego Senjoba, Jo Sasaki, Yoshino Kosugi, Hisatoshi Toriya, Masaya Hisada, Youhei Kawamura   +5 more
doaj   +1 more source

Geological mapping and stand-up time estimation based on core drill evaluation using RMR89 on Tunnel 3 Sigli Banda Aceh Toll Road [PDF]

E3S Web of Conferences, 2021
Tunnel 3 of the Sigli Banda Aceh Toll Road has been designed based on several site investigations. The site investigations have not included surface geological investigations.
Latif Hanif Khoirul, Husein Salahuddin, Indrawan I Gde Budi   +2 more
doaj   +1 more source

A Novel Mesoscopic Drill Bit Model for Deep Drilling Applications

Modelling, 2023
This paper deals with the development of a novel mesoscopic model of polycrystalline diamond compact (PDC) drill bits that can be implemented in complex drill string models for simulations to analyse the influence of rock inhomogeneities or the impact of
Mohamed Ichaoui, Frank Schiefer, Georg-Peter Ostermeyer   +2 more
doaj   +1 more source

Remote control drill for small section hard rock roadway in coal mine

Meikuang Anquan, 2021
Aiming at the problems of low drilling efficiency, high labor intensity and low safety in the traditional blasting process of small section hard rock roadway in coal mine, a remote control drill for small section hard rock roadway tunneling was developed.
WANG Tianlong, SONG Haitao, DONG Hongbo
doaj   +1 more source