Traditional electric strain sensors have poor waterproof performance and low precision,so they are unsuitable for laneway water inrush model test.To solve these problems,a novel fiber-optic grating strain sensor based on similar material to model is developed.The fiber-optic sensing network is established using the wavelength division multiplexing(WDM) technology and F-P demodulating technology,and the software with real-time display and automatic warning is compiled.The system is used in laneway water inru...