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Abstract In order to obtain the precursor information of intense instability destruction of coal and rock mass which is induced by the deep mining，roadway excavation and face mining disturbance，according to the abnormal signal of coal samples would produce under external loads，which include elastic wave，charge，temperature signals，etc.，monitoring devices including acoustic emission instrument，LCR bridge，infrared thermograph and static strain devices are used to synchronously monitor the failure process under uniaxial compression. In order to study the multiparameter evolution characteristics，all data are selected in the same time axis. Meanwhile，principal component analysis and factor analysis in multivariate statistical analysis are used to analyze the original monitoring results of multiparameter；and the results show that acoustic emission and stress monitoring results could better reflect the characteristics of the samples? precursor destruction and get the precursor information of coal samples? instability destruction.
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Received: 08 August 2011
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2012, Vol. 31 
