Paper Title:
Mechanical Characteristic of Buffer/Backfilling Materials After Different Temperatures
  Abstract

Based on uniaxial compression test, the mechanical properties of buffer/backfilling materials after different temperatures are studied. The study analyzed buffer/backfilling materials of stress-strain curve,peak stress,modulus of elasticity,peak strain, with the variation of temperature. The buffer/backfilling materials of strengthening and degradation in different temperature are discussed briefly. The test result show that below 200°C, buffer/backfilling materials of stress-strain curve of slope,peak stress,modulus of elasticity,peak strain ,are increase with increasing temperature increase. The main reason is that with increasing temperature, adsorbed water in the sample will evaporate, and brittleness of sample will improve; mineral particles of expansion lead to the original cracks closing, the porosity will reduce, and improve friction properties between particles. 300 °C,buffer / backfill materials of stress - strain curve of slope, peak stress, elastic modulus, decreased to varying degrees compared to 200 °C. the main reason is that thermal stress damage to the internal structure of the samples, resulting in new small cracks. The peak strain of buffer / backfill materials in the 25 °C~100 °C is increase with increasing temperature increase.100°C~200°C, peak strain is decrease with the increase of temperature. In the 200 °C~300 °C, the peak strain change little.

  Info
Periodical
Advanced Materials Research (Volumes 347-353)
Chapter
Chapter 1: Development and Utilization of Solar Energy
Edited by
Weiguo Pan, Jianxing Ren and Yongguang Li
Pages
852-857
DOI
10.4028/www.scientific.net/AMR.347-353.852
Citation
M. Q. Yan, F. C. Yi, B. L. Zhu, "Mechanical Characteristic of Buffer/Backfilling Materials After Different Temperatures", Advanced Materials Research, Vols. 347-353, pp. 852-857, 2012
Online since
October 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yi Gao, Zhuo Bin Wei
Abstract:Frothing technics with mixed polyurethane materials have been widely used in the field of civil engineering. Polyurethane has many...
151
Authors: Bao Jie Fu, Min Tu
Abstract:High stress makes backfill body present the rheological properties in deep mine. This paper first uses RRTS-ⅢA to carry on creep test of...
3156
Authors: Shao Jie Chen, Wei Jia Guo, Hai Long Wang, Yi Tao Zhong
Chapter 1: Geotechnical Engineering
Abstract:In order to research the mechanical properties of the backfill cream-body under engineering conditions in the coal mine, the uniaxial...
533