光纤光栅测力锚杆在煤矿巷道围岩监测中的应用

FBG sensing technology is applied to coal mine safety monitoring gradually. One of them is the application in the transmission gate road surrounding rock project of Zhuji coal mine 1111(1) first mining face. According to this, three parts are mainly illustrated in this paper, they are respectively the working principle of tunnel monitoring system, the specific steps and methods of system installation and debugging, and the distribution and changing trend of bolt stress field and surrounding rock temperature field. The study result shows that the distribution of bolt stress presents heterogeneity, volatility and diversity: there are three kinds of types in the initial distribution of roof bolt stress which are increasing, decreasing and waving. For bolt bearing behavior, increasing type is ideal. Bending moment exists in partial bolts. Enhanced mining disturbance also leads to the growth of bolt stress. The temperature of surrounding rock decreases along with the increasing depth, and the temperature of the shallow rock changes significantly over time.