NDLI: The mechanism and experimental study on fracture of thick-bedded backfill roof under high stress

Content Provider	IEEE Xplore Digital Library
Author	Xiao-jun Wang Jin-an Wang
Copyright Year	2011
Description	Author affiliation: School of Civil and Environment Engineering, Beijing University of Science and Technology, China (Xiao-jun Wang; Jin-an Wang)
Abstract	Simply supported beams subjected to uniform was considered mechanical model of backfill roof of underhand drift cut-and-filling stopping, because high-span ratio of stratified backfill was relatively large, there might be some errors in the bearing capacity calculation of material mechanics, through the analysis of the model boundary shape and mechanical distribution characteristic, a semi-inverse method of elasticity was used to obtain stress corrected solutions of load-bearing beam. So three mathematical models were created through different high-span ratios, that were 3∶10,3∶5,3∶3, and stress failure curve of elasticity solution was compared with stress failure curve of material mechanics solutions and to validated the correctness of the corrected formula. critical failure equation of backfill roof was derived based on maximum stress criterion, the critical failure curve of backfill was achieved by substituting the mechanics parameters of different stresses into the analytical formulas, and failure modes of backfill roof is found through physical modeling experiment. The results show that the failure of backfill roof is first happening from the center at the bottom of backfill, the final result is that falling arch. Finally, effective measures were proposed to avoid failure of backfill roof.
Starting Page	2770
Ending Page	2774
File Size	504210
Page Count	5
File Format	PDF
ISBN	9781457702891
e-ISBN	9781457702907
DOI	10.1109/ICETCE.2011.5774566
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-22
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Analytical models High-span ratio Backfill roof Metals Materials Rocks Mathematical model Semi-inverse method Falling arch Stress Strain
Content Type	Text
Resource Type	Article

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