Theory of rockburst start-up and its complete technology system

The core of rock burst research is divided into two parts:one is the theoretical understanding of rock burst occurrence;the other is a set of technical system based on the theoretical understanding of rock burst occurrence. The traditional theory of rock burst does not correspond to the actual engineering structure problems such as stope and roadway. How to monitor and prevent rock burst in the next step still needs further development. At present,the appli- cation of monitoring and prevention technology in combination with the degree of disasters is based on the requirements of laws and regulations. Due to the lack of scientific technical system guidance for different periods of the mine,the effect of rock burst prevention is very little. In order to realize the prevention of rock burst in various stages of mine construction and production,the application of monitoring and prevention technology is carried out. With the goal of systematization and systematization, the theory of coal mine rockburst initiation and its technical system are stud- ied. Using cybernetics black box research method,taking the physical evolution process of rock burst as a breakthrough point,combining theory with engineering cases,the impact initiation principle of rock burst was analyzed emphatically. On the basis of supplementing and perfecting the theory of rock burst initiation,the theory of rock burst initiation was connected with monitoring and prevention technology,and the impact initiation principle was analyzed. The main types of start-up and the theory of rock burst start-up have four engineering guiding significance,thus establishing the theory of coal mine rock burst start-up and its set of technical system, and verifying the feasibility through field prac- tice. ① Coal mine geology and mining conditions provide static and dynamic load source for rock burst occurrence,and mainly affect the starting link of rock burst rather than the whole process;② In the engineering structure composed of coal seam,roof and floor,and cavity,the starting principle of rock burst is that the elastic-brittle single structure breaks through the material strength limit and material instability,resulting in the structure of Engineering structure. The re- sults of dynamic instability;③ Based on the four practical guiding significance of the improved shock start theory,the theory and technical system of regional prevention of rock burst with centralized static load dredging is put forward for the mine in construction period. For the mine in production period,on the basis of determining the type of shock start, it is proposed that the load source of induced shock start should be taken as the center,the source monitoring and the source prevention should be separated. The thought of “ unloading and supporting” coupling anti-scouring is mainly based on “unloading” and supplemented by “supporting”. The theory of coal mine rock burst initiation and its set of technical system have been applied in the construction and production stages of a mine in Binchang mining area, Shaanxi Province,respectively. Practice has proved that the theory and technical system of rock burst prevention and control in the whole period of the mine can be adapted,and the engineering application effect is good.