Acoustic Emission Prediction Technology for Coal and Gas Outburst in Torsion Structural Zone in Donglin Mine
KANG Jiandong
Abstract： To counter the insufficient research on the disaster characteristics of coal and gas outburst in the torsion structural zone and the non-contact continuous prediction technology in Donglin Mine of Nantong Coal Mining Area,research was carried out on the disaster characteristics of coal and gas outburst in the torsion structural zone and the acoustic emission prediction technology of coal and gas outburst through laboratory study and on-site investigation. The results indicated that the squeezing action and shearing and sliding action in the formation process of the torsion structural zone in Donglin Mine caused the sharp change of the seam thickness and the concentration of structural stress,the frequent occurrence of coal and gas outbursts and serous overrun of cuttings index,and showed the characteristics dominated by the stress. In addition, study was made on the disaster prediction indicators of coal and gas outburst in Donglin Mine by using acoustic emission prediction technology and the conventional cuttings index prediction technology,it was determined that the critical value of cuttings volume for coal and gas outburst was 15kg/m and that of the energy index of acoustic emission was 20.
Keywords：coal and gas outburstdisaster characteristicsacoustic emission technologyprediction indexes
Publication Date：2013-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 53-55,58 )