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2016-7-3 · NDT of rock bolts after their installation is a vital issue to ensure safety of staff working at the rock facility as well as sustainable rock reinforcing [1],[2]. Techniques for the inspection of rock bolt integrity have been an issue addressed by various researchers [2-6].
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Get PriceLee, JS, Kim, HJ, Lee, IM, Han, SI & Lee, YJ 2007, Rock bolt integrity evaluation in tunnelling using ultrasonic NDT techniques. in Proceedings of the 33rd ITA-AITES World Tunnel Congress - Underground Space - The 4th Dimension of Metropolises. 'Proceedings of the 33rd ITA-AITES World Tunnel Congress - Underground Space …
Get PriceNDT.net Issue - 2017-11 - Articles ; NDT.net Issue: 2017-11 Publication: Review of Open Access Articles by NDT.net (NDT Review) Session: Sensors (MDPI) ARTICLE A Review of Rock Bolt Monitoring Using Smart Sensors Gangbing Song 1 4, Weijie Li 1, Bo Wang 2 2, Siu Chun Michael Ho 1 1 Department of Mechanical Engineering; …
Get Price2013-12-1 · In the mining industry the rock or roof bolts used are typically up to 3 m length depending on the height of the roadway.The components of a bolt system are the protruding, free and fixed lengths and an head assembly (bearing plate and a nut) through which load is transmitted to the surrounding rock mass or soil (see Fig. …
Get Price2003-6-1 · The rock bolt was modelled as a three layer axially symmetric system, consisting of a steel layer and an epoxy layer embedded in an infinite expanse of limestone, as shown in Fig. 3. Limestone was chosen as the embedding material to allow direct comparison with site test results from a limestone mine, although the effect of different rock …
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Get PriceA stress wave is induced down the bolt using 3 to 5 lateral blows of a small hammer near the end of the bolt. A receiving velocity transducer held against the end of the bolt detects the axial waveform from the stress wave echos and is recorded via an analogue to digital converter. Mod-Shock underground rock bolt being tested
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Get PriceLuoyang Sinorock Engineering Material Co.,Ltd is a professional self-drilling manufacturer, which has the ISO 9000 quality certification.It's mainly used in the mineral exploration,tunneling and slope stabilization project. Main Item: self-drilling rock bolt. Business Type: Manufacturer, Exporter.
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Get Price2021-7-5 · Rock bolts. Since its introduction 30 years ago the Swellex expandable rock-bolting system has gained wide recognition in the mining and tunneling industry. This unique rock bolt consists of a welded tube folded in upon itself, sealed at one end. It is re-expanded using a high pressure water flow provided by a special …
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