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
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Research on surrounding rock control technology of roof cutting and pressure relieving for roadside filling in gob-side entry retaining of large mining height panel. [PDF]
Sci RepWeiyong L +5 more
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The characterisation and analysis of in-situ and blasted block-size distributions and the blastability of rock masses. [PDF]
, 1997 PhDIn this thesis, previous research on discontinuity geometry, in-situ block size distribution (IBSD), blasted block size distribution (BBSD), and blastability of rock mass is discussed.
Lu, Ping
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Advances in Materials Science and Engineering, 2020 Conical pick is a rock cutting tool that is commonly used in roadway driving. Pick wear frequently happens in the course of breaking hard rock. The current paper shows a new method to solve the problem of pick wear. The rock is preslit with the saw blade
Zhenguo Lu +4 more
doaj +1 more source
Research on cutting performance and fatigue life of conical pick in cutting rock process
Science Progress, 2021 The conical pick is the most crucial tool of roadheader for breaking rock, establishing the conical pick cutting rock and conical pick fatigue life numerical simulation models to investigate the influence of cutting parameters on rock damage, average ...
Qingliang Zeng +5 more
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Applied Sciences, 2022 During automatic and intelligent cutting at the coal mining face, complex geological conditions (fold structure, fault structure and magmatic intrusion) easily cause distinct occurrence conditions of coal rock seams (gangue, inclusion, or fault in the ...
Linlin Wang +3 more
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Rock Hardness Identification Based on Cutting Motor Current of Roadheader
Meikuang Anquan, 2020 It is difficult to monitor the cutting load directly during the driving process of roadheader for rock tunnel, which leads to the problem that the cutting speed and swing speed cannot be adjusted in time to adapt to the rock hardness change.
HE Ying, TIAN Muqin, SONG Jiancheng, FENG Junling, DONG Zonghui
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Study on vibration characteristics of roadheader cutting pre-cracked hard rock. [PDF]
Sci RepLiu H, Li F, He J, Wang W, Zhang H.
europepmc +3 more sources
Investigation of the influence mechanism of rock damage on rock fragmentation and cutting performance by the discrete element method [PDF]
Royal Society Open Science, 2019 Rock damage is one of the key factors in the design and model choice of mining machinery. In this paper, the influence of rock damage on rock fragmentation and cutting performance was studied using PFC2D.
Si-fei Liu +3 more
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Research on Cutting Characteristics of Rock Plate with Two Sides Fixed and Two Sides Free
Advances in Materials Science and Engineering, 2020 Conical pick wear is an urgent problem in the roadway excavation caused by hard rock difficult to break. The traditional method of increasing cutting power to improve cutting performance of conical pick significantly increases pick wear.
Zhenguo Lu +4 more
doaj +1 more source