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International Journal for Numerical and Analytical Methods in Geomechanics
ABSTRACT The wear problem of disc cutters during large‐diameter shield tunneling in hard rock stratum has become increasingly prominent, significantly increasing engineering construction costs. Aiming at the disc cutter wear problem during large‐diameter shield tunneling in hard rock stratum, this paper analyzes the rock‐breaking form
Shang‐Qu Sun +5 more
exaly +2 more sources
ABSTRACT The wear problem of disc cutters during large‐diameter shield tunneling in hard rock stratum has become increasingly prominent, significantly increasing engineering construction costs. Aiming at the disc cutter wear problem during large‐diameter shield tunneling in hard rock stratum, this paper analyzes the rock‐breaking form
Shang‐Qu Sun +5 more
exaly +2 more sources
Numerical simulation of rock-breaking mechanisms by triple-ridged PDC cutter in hard rocks
Geoenergy Science and Engineering, 2023Huai Zhong, Zhongwei Huang, Wenhao He
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Study on Mechanism and Regularity of Rock Breaking by Pulsed Water Injection with Particles [PDF]
Processes, 2023 In recent years, the drilling technology applied to deep and ultra-deep formations has developed rapidly, but the drilling speed for hard formations is low. Therefore, it is very important to study the drilling methods for deep and hard strata.
Qingxiang Wu +2 more
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Effect of microwave irradiation on the breaking and linear cutting of hard rock
Engineering Fracture MechanicsYixin Zhao, Sen Gao
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Characteristics of Conicl Diamond Tooth for Breaking Hard Rock Under Vibratory Percussion
57th U.S. Rock Mechanics/Geomechanics Symposium, 2023ABSTRACT The application of conicl PDC teeth to vibratory percussion drilling technology is expected to break deep hard rock efficiently and improve drilling efficiency. In this paper, the characteristics of conicl diamond tooth cutting and hard rock under percussion are investigated.
Ran Ji +5 more
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The Development of Microwave Assisted Machineries to Break Hard Rocks
Proceedings of the International Symposium on Automation and Robotics in Construction (IAARC), 2011Novel rock breakage techniques are becoming more viable. According to a major research report on explosive free rock breakage (EFRB) completed by the authors and others, the use of microwave energy was highlighted as a high potential technique in assisting the breaking of hard rocks.
Ferri Hassani, Pejman Nekoovaght
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Effectiveness of the use of high impact energies for breaking hard ledge rocks
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 19731. The higher the impact energy, the lower is the value of the stresses which must be induced in a rock mass being broken. 2. The use of high impact energies creates more favorable stresses for the percussion tool. 3. In the case of high-energy impact, with increasing hardness of the rock the rate of rock breaking will either
B. V. Voitsekhovskii +2 more
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Journal of Testing and Evaluation, 2023
ABSTRACT Rock breaking by double hydraulic hammers has a wide application prospect in hard-rock roadway excavation because of its environmental protection and strong rock-breaking ability, but the optimal spacing under double-indenter synchronous impact is not clear.
Zhongwen Yue +6 more
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ABSTRACT Rock breaking by double hydraulic hammers has a wide application prospect in hard-rock roadway excavation because of its environmental protection and strong rock-breaking ability, but the optimal spacing under double-indenter synchronous impact is not clear.
Zhongwen Yue +6 more
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A high-power hydraulic drill for breaking hard rock
Soviet Mining Science, 19741. Direct impact of the striker mass on the rock can greatly increase the impact energy and the efficiency of the apparatus. 2. Automatic operation of the mechanism for opening the ports increases the frequency of impacts of the hydraulic drill. 3. A hazardous state which can occur in the absence of obstacles to impact can be
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