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A platform for research: civil engineering, architecture and urbanism
Medium-Term Strength and Electromagnetic Radiation Characteristics of Cemented Tailings Backfill Under Uniaxial Compression
https://orcid.org/0000-0003-4086-4922
Abstract It is important to grasp the medium-term mechanical properties of cemented tailings backfilling (CTB) for the structural parameter design. The CTB samples with the cement to tailings (c/t) ratio of 1:4, the slurry mass of 70 and 75%, respectively. The uniaxial compressive tests were carried out on the CTB samples of curing time of 56 and 90 days respectively by SANS servo and CTA-1 acoustic–electric dynamic data acquisition system. The experimental results show that: (1) the CTB samples are accompanied with the electromagnetic radiation signal release during the loading process. The stress of the CTB samples are almost linearly distributed before the peak compressive strength. After the peak strength, the uniaxial stress decreases rapidly with the increase of the loading time, and the specimens of CTB rapidly damage; (2) during the loading process, the pulse count and energy of the electromagnetic pulse show the initial calming stage, the first active stage, the second calm stage before the peak strength, second active and the calming stage with the increase of the loading time, showing “calm-active-calm-active-calm”. The accumulated pulse count and cumulative energy increase with the loading time, and gradually stabilize after the second active stage. And the results may provide a beneficial inference for researches on production mechanism and forecast of the fugitive disaster of CTB.
Medium-Term Strength and Electromagnetic Radiation Characteristics of Cemented Tailings Backfill Under Uniaxial Compression
https://orcid.org/0000-0003-4086-4922
Abstract It is important to grasp the medium-term mechanical properties of cemented tailings backfilling (CTB) for the structural parameter design. The CTB samples with the cement to tailings (c/t) ratio of 1:4, the slurry mass of 70 and 75%, respectively. The uniaxial compressive tests were carried out on the CTB samples of curing time of 56 and 90 days respectively by SANS servo and CTA-1 acoustic–electric dynamic data acquisition system. The experimental results show that: (1) the CTB samples are accompanied with the electromagnetic radiation signal release during the loading process. The stress of the CTB samples are almost linearly distributed before the peak compressive strength. After the peak strength, the uniaxial stress decreases rapidly with the increase of the loading time, and the specimens of CTB rapidly damage; (2) during the loading process, the pulse count and energy of the electromagnetic pulse show the initial calming stage, the first active stage, the second calm stage before the peak strength, second active and the calming stage with the increase of the loading time, showing “calm-active-calm-active-calm”. The accumulated pulse count and cumulative energy increase with the loading time, and gradually stabilize after the second active stage. And the results may provide a beneficial inference for researches on production mechanism and forecast of the fugitive disaster of CTB.
Medium-Term Strength and Electromagnetic Radiation Characteristics of Cemented Tailings Backfill Under Uniaxial Compression
https://orcid.org/0000-0003-4086-4922
Abstract It is important to grasp the medium-term mechanical properties of cemented tailings backfilling (CTB) for the structural parameter design. The CTB samples with the cement to tailings (c/t) ratio of 1:4, the slurry mass of 70 and 75%, respectively. The uniaxial compressive tests were carried out on the CTB samples of curing time of 56 and 90 days respectively by SANS servo and CTA-1 acoustic–electric dynamic data acquisition system. The experimental results show that: (1) the CTB samples are accompanied with the electromagnetic radiation signal release during the loading process. The stress of the CTB samples are almost linearly distributed before the peak compressive strength. After the peak strength, the uniaxial stress decreases rapidly with the increase of the loading time, and the specimens of CTB rapidly damage; (2) during the loading process, the pulse count and energy of the electromagnetic pulse show the initial calming stage, the first active stage, the second calm stage before the peak strength, second active and the calming stage with the increase of the loading time, showing “calm-active-calm-active-calm”. The accumulated pulse count and cumulative energy increase with the loading time, and gradually stabilize after the second active stage. And the results may provide a beneficial inference for researches on production mechanism and forecast of the fugitive disaster of CTB.
Medium-Term Strength and Electromagnetic Radiation Characteristics of Cemented Tailings Backfill Under Uniaxial Compression
Cao, Shuai (author) / Song, Weisong (author)
2018
Article (Journal)
Electronic Resource
English
BKL:
57.00$jBergbau: Allgemeines
/
38.58
Geomechanik
/
57.00
Bergbau: Allgemeines
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
Study on Damage Constitutive Model of Cemented Tailings Backfill under Uniaxial Compression
| British Library Conference Proceedings | 2013