Dynamic measurements and behave laws of tunnel pressure in deep mining
With the deep mining development of coal resource, many safety problems have arisen and become serious gradually, such as tunnel deformation, rock burst, and so on. Multi-source techniques and methods must be used to monitor and study the behave laws of tunnel pressure, thus safety and efficient mining can be guaranteed. It takes the working face No. VI 15-22020 and its transportation tunnel of 2nd level of a mine in Hehan province as the research subject. Borehole stress meters, multi-point extensometers, instruments of roadway convergence were used to monitor the characteristics of abutment pressure of working face, roof displacement and section deformation of surrounding rock of tunnel in the influence of deep mining. And the behave laws of tunnel pressure in deep mining of the coal mine are summarized and analyzed, which have important directive to mining design and safety.