Results 1 to 10 of about 928 (67)
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.
Zhenyi Yang, Jun Li, Guoyan Yu
exaly +3 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 +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 +5 more
doaj +1 more source
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 +5 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
Effect of Bit Configuration in Impact Penetration Tests with Button Bits
Journal of MMIJ, 2016 Computer simulation of percussive rock drilling requires appropriate numerical models for the interactions among the drill body, rod, rod joint, bit, and rock.
Yingzong LIANG +4 more
doaj +1 more source
Applied Sciences, 2023 The interaction between the drill bit and rock is a complex dynamic problem in the process of drilling and breaking rock. In this paper, the dynamic process of drilling and breaking rock is analyzed using ABAQUS software.
Xinxing Liu +3 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 +2 more
doaj +1 more source
Drilling Processes with Hydraulic Percussion Rock Drills
Journal of MMIJ, 2017 Rock drills were developed about two hundred years ago, and hydraulic percussion rock drills are about half-century old. Performance and efficiency of rock drills have been increased by a number of researchers and engineers.
Kimihiro HASHIBA +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 +2 more
doaj +1 more source