关键词:  , 采矿工程；光纤光栅传感器；岩层变形；钻孔；模型实验

Abstract:   To explore the rock deformation in coal mine by the monitoring of embedded fiber Bragg grating (FBG) through deep borehole，an experimental physical simulation model was built for simulating the strata compression and subsidence process．Additionally，a prefabricate concrete bar with three embedded FBG sensors was designed to simulate deep borehole，and was placed in the physical model．The deformation of the prefabricate concrete bar during strata compression and subsidence processes was measured by the wavelength changes of FBG sensors，and was compared to the strain changes monitored by a resistance strain gauge located on the prefabricate concrete bar at the same location．The test results show that the FBG monitoring system has the advantages of high sensitive，reliable and stable，etc，and can realize the real-time monitoring of rock deformation. It is proved that the FBG monitoring system is an efficient method for measuring and understanding deformation of deep rock strata through a surface borehole．

Key words:  , mining engineering；FBG sensor；rock deformation；borehole；simulation experiment