Study on the application of discrete wavelet on the risk diagnose of surrounding rock stability of gold Mine

摘要

In the area of underground mining space, crack or displacement in the surrounding rock may continuously accumulate somewhere, and finally lead to roof collapse and slabbing. It is very important to make effective risk diagnoses in underground working space. In the present paper, based on the test in laboratory and the test in-situ, Fiber Bragg Grating (FBG) sensor embedded in rock bolt as monitoring means were applied in the test in-situ. And by the blasting test in the mine, it is realized that the method by FBG is successful in obtaining the signals on the strain of the rock. It is understood that the signal analysis could be implemented by using discrete wavelet analysis that extracting damage information from the signal deference between static and dynamic response and estimating the signal abnormal. With the use of online FBG sensor and discrete wavelet analysis technology, the monitoring technology on risk diagnoses could be developed.