Rock breaking law of TBM hob assisted by low pressure abrasive air jet grooving [PDF]
Meitan xuebaoThe application of full-face tunnel boring machine (TBM) in mine mining is gradually popularized. There are some problems in the construction of tunnels with hard surrounding rocks, such as difficulty in tunneling and serious tool loss.
Hongtu ZHANG +4 more
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3D Numerical Simulation of Rock Cutting of an Innovative Non-Planar Face PDC Cutter and Experimental Verification [PDF]
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
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The Vibration Response to the High-Pressure Gas Expansion Method: A Case Study of a Hard Rock Tunnel in China [PDF]
Applied SciencesThe vibration of rock breaking in tunnel excavation may cause serious damage to nearby buildings if it is not controlled properly. With reference to a hard rock tunnel in China, the vibration response to the high-pressure gas expansion method (HPGEM), an
Huaide Peng +5 more
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Chinese Journal of Mechanical Engineering, 2023 The operation of a shield tunnel boring machine (TBM) in a high-strength hard rock stratum results in significant cutter damage, adversely affecting the thrust and torque of the cutter head.
Hua Jiang +4 more
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Breaks in Resistivity Sounding Curves as Indicators of Hard Rock Aquifers [PDF]
Hydrology Research, 1983 In a previous paper (Nordic Hydrology, Vol. 12, 1981), the authors have discussed the inadequacies in the technique of resistivity method for location of sites for constructing deep water walls in hard rock areas. It was pointed out that the water bearing fracture zones in the bed rock could not be identified by merely considering geoelectrical ...
R. Baratan +2 more
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Simulation Analysis of the Influence of Amplitude on Deformation and Fracture Characteristics of Hard Rock under Ultrasonic Vibration Load [PDF]
, 2023 The utilization of auxiliary tools employing ultrasonic high-frequency vibration to enhance rock breaking efficiency holds significant potential for application in underground hard rock excavation engineering.
Zhijun Niu +3 more
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Rock Breaking under Rolling TBM Disc Cutters in Hard Rock Conditions – Visualization and documentation of cracks [PDF]
, 2019 Tunneler kan drives med boring og sprengning eller ved bruk av en tunnelboremaskin (TBM). Tunneboremaskinen har et roterende sirkulært hode med påmonterte kuttere av stål og kalles kutterhodet. Berget brytes ved at kutterene presses med stor kraft mot bergoverflaten samtidig som kutterhodet dreies rundt.
Vassenden, Solveig
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Research on influencing factors of rock breaking efficiency under ultrasonic vibration excitation
AIP Advances, 2023 The ultrasonic vibration rock-breaking technique shows broad application prospects in the hard-rock-breaking domain. The rock-breaking efficiency strongly depends on vibration parameters.
Zhanbiao Yang +3 more
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Research on the Hard-Rock Breaking Mechanism of Hydraulic Drilling Impact Tunneling [PDF]
Mathematical Problems in Engineering, 2015 In order to realize the rapid hard-rock tunneling in a safe, highly effective, and economic manner, the hydraulic drilling impact hard-rock tunneling (HDIHT) technology and method were introduced based on the theories of rock mechanics and hydraulic impact. The key parameters, including drilling radius and impact distance, were researched to reveal the
Risheng Long, Shaoni Sun, Zisheng Lian
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An innovative and effective approach to hard rock cutting [PDF]
, 2016 ISRM International Symoposium on Rock Mechanics and Rock Engineering - From the Past to the Future -- AUG 29-31, 2016 -- Cappadocia, TURKEYOne of the most important problems of hard rock cutting machines is machines are able to cut the rocks having ...
Ghamgosar, M., Erarslan, N.
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