|Table of Contents|

Numerical simulation of different combination of coal and rock sample mechanics and acoustic emission characteristics

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2016年04期
Page:
485-
Research Field:
Publishing date:

Info

Title:
Numerical simulation of different combination of coal and rock sample mechanics and acoustic emission characteristics
Author(s):
Fu BinZou ZonghongWang YouxinLiu SongXiao Yingchun
Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China
Keywords:
coal-rock combination body numerical simulation mechanical property acoustic emission characteristics
PACS:
TU45
DOI:
10.14177/j.cnki.32-1397n.2016.40.04.018
Abstract:
In order to study the mechanical properties and acoustic emission characteristics of different coal-rock combined bodies,the RFPA2D is used to simulate different combination modes include the rock and the combination inclined angle.Under different confining pressure,the mechanical properties and the AE characteristics are obtained.The results show that:the different samples have the similar uniaxial stress-strain curves and the peak strengths of the different coal-rock combined bodies are close to the strength of the coal.With the increasing of the combination inclined angle,the greater of the rock strength,the earlier the strength of coal-rock combined bodies decay quickly.The internal friction angles of the coal-rock combined bodies reduce with the increasing of the combination angle,while the cohesions of the samples increase firstly and then decrease.With the increase of the confining pressure,the maximum AE ringing counting rates of the samples have experienced the process that decrease firstly and then increase.The maximum AE ringing counting rates of the samples have a positive correlation with the strength of the rock in the coal-rock combination bodies.

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Last Update: 2016-06-30