Results 31 to 40 of about 361,142 (196)
Numerical studies of floor heave control by the rock bolts reinforcement technology in retained gob-side gateroad [PDF]
E3S Web of ConferencesThe effectiveness of modified rock bolts reinforcement technology for floor heave control in gob-side entry retaining was studied in this paper. A finite-element numerical simulation was used to analyse stress-strain state of surrounding rocks before and
Sakhno Ivan +3 more
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International Journal of Mining Science and Technology, 2013 Comparing with the resin bolt, the hydraulic expansion bolt has different anchoring mechanism and application advantage. According to the working mechanism of the hydraulic expansion bolt, its anchoring force is expressed in four forms including support ...
Qingliang Chang +3 more
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Study on floor heave mechanism and control technology of roadway based on slip line field theory
矿业科学学报, 2021 Based on the slip line field theory, the slip line field model of roadway floor is established.Taking 1021 roadway of Huipodi coal mine in Shanxi Province as the engineering background, the mechanism of asymmetric floor heave of roadway is studied, and ...
Cheng Hui +5 more
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The prediction of total heave of a slab-on-grade floor on Regina clay
Canadian Geotechnical Journal, 1983 Several analytical methods for the prediction of total heave of desiccated, expansive soils have been proposed for various geographic regions. The proposed method herein is based on a general theory for unsaturated soil. The in situ stress conditions, as assessed from the corrected swelling pressure and the required soil moduli, are deduced from the ...
Yoshida, R. T. +2 more
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An impedance approach to reduce the contact-instability whilst drilling with active heave compensation [PDF]
, 2012 The bit-bounce, or contact-instability, phenomenon which occurs in the drill string suspended from a floating vessel with an active drill string compensator to maintain a steady weight on the drill bit is investigated.
Hatleskog, Jan, Dunnigan, Mathew Walter
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Geofluids, 2022 A floor heave is usually a serious failure phenomenon in mine roadways, especially in the conditions of a wet soft rock. There are bright prospects for using a method of reinforcing for controlling a floor heave in mine roadways under a dramatic heave ...
Ivan Sakhno +3 more
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Computer modelling of a floor heave in coal mines
Journal of Physics: Conference Series, 2019 Abstract The paper presents results of numerical modeling of the longwall gateroad floor heave in the Taldinskaya-Zapadnaya-2 mine. The research is conducted using the finite element method. The research has shown that the floor heave can be reduced when using the relieve slots which are cut in two areas. The reasons and the mechanism of
A A Ilinets, A A Sidorenko, Y G Sirenko
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Yantu gongcheng xuebao, 2022 Under the complex stress environment of deep high ground stress and interlayer weak interlayer (structural surface), the deformation of the surrounding rock of composite coal (rock) roadway is severe, and the floor heave is particularly prominent.
ZHANG Dong 1, BAI Jian-biao 1, 2, YAN Shuai 2, WANG Rui 1, MENG Ning-kang 1, WANG Gong-yuan 1
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Floor heave due to biochemical weathering of shale
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1975 Eighth International Conference on Soil Mechanics and Foundation Engineering, 1973 ...
Penner, E., Eden, W. J., Gillott, J. E.
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Distributed optical fiber measurement of floor heave evolution in mining roadway
Meitan kexue jishu, 2023 With the deepening of coal mining and the upsizing of mining equipment, the floor heave of the mining roadway has become an important problem that restricts the efficient and safe mining of the working face.
CHAI Jing +11 more
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