Analysis on Water Affected to Mechanical Property and Acoustic-Electricity Characteristics of Coal Sample
SHEN Rong-xi
YANG Sheng-li
DENG Xiao-qian
BAN Qing-yu
QIU Li-ming
Abstract：In order to obtain water affected to the mechanics features and acoustic-electricity features of the coal sample,a tensile experi-ment was conducted on the dry coal sample and saturated coal sample.The variation differences between the stress strain and acoustic-e-lectric signal of the dry and saturated coal samples during the tensile process were compared and analyzed. The study showed that during the tensile process,the coal sample had experienced a stress liner increasing,plastic increasing and tensile fracturing stages and the elec-tromagnetic radiation and acoustic emission signal were basic synchronous correspondence to the deformation fracturing of the coal sample. At the initial loading period,the acoustic and electric signal was low and when a plastic deformation or a fracturing deformation occurred, the acoustic-eclectic signal was rapidly increased to the peak.Water could make the tensile strength of the coal sample reduced by 31.5%and could make the tensile stress increased by 101.1%.Water could reduce the strength and increase the plasticity of coal sample to make the acoustic-electric signal attenuation.The monitoring,measurement and analysis on acoustic-electric signal variation amplitude of the coal sample could evaluate the influence degree of mechanical property and acoustic-electricity characteristics of water to coal sample.
Keywords：coal strengthtensile failureelectromagnetic emissionacoustic emission
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 11-13,115 )