Study On Prewarning System Of Underground Engineering Excavating Disaster

The research on cataclysmic law of underground engineering excavating disasters is the basis of research on prewarning system of underground engineering excavating disasters. From analyzing the macroscopic failure characteristic of underground engineering excavating disasters, author cleared the main control factors or couple body of main control factors inducing underground engineering excavating disasters. With the cataclysmic law as key researching point, author established the forecasting formula system of underground engineering excavating disasters and provided the theoretical basis for critical hazard forecasting and adopting control disaster measures. The prewarning system of underground engineering excavating disasters with cataclysmic law, cataclysmic information monitoring and control disaster measures organically combined was primarily established in the thesis.The discrimination and classification of rock aeolotropy is an important problem of rock mechanics research. Using group theory, author researched the theoretical discriminating method of rock aeolotropy types from aeolotropy type of rock, elastic symmetrical direction and the number of independent elastic parameter of rock and established the aeolotropy discriminant criteria of transversely isotropic rock and orthotropic rock first time.The three basic types of disaster induced by underground engineering excavating as partial earth pressure disaster, earth surface depression and systematic earth pressure disaster were researched respectively and its researching forms of prewarning system of disaster were also established in the thesis.In the research on partial earth disaster induced by underground engineering excavating, the mathematical formulas of peripheral secondary earth pressure of various form caves by complex variable function method was developed and the distributing curves of pressure concentration factors were drowned. In the research on rockburst disaster, the discriminant criteria of rockburst tendency were established by statistical method and rockburst wasclassified for the purpose of disaster prewarning. The basis working principle of acoustic emission techniques to rock, limitations and developing direction of application to rockburst forecasting were discussed.In the research on prewarning system of earth surface depression disaster induced by underground engineering excavating, the mechanical essence established on self-weight stress field of Stochastic Medium Theory and it's engineering application were discussed. Author marked out that Stochastic Medium Theory aren't suitable for the researching on surface depression due to underground engineering excavating coupling tectonic stress action. To the researching on laws of surface depression of variable space-time allocation excavating, the "changed Stochastic Medium method" and it's formula system were developed. The mechanic model and researching methods of surface depression due to underground excavating on the action of tectonic stress were systematically researched first time and forecasting formula system of surface subsidence were also developed. For the purpose of engineering application, the engineering treatment method was viewed. From void source action theory, the void space diffusion model of rock dewatering was established and the forecasting formula system of void space diffusion earth surface subsidence resulted from rock dewatering was developed first time in the thesis.In the thesis, the concept, definition and intension of systematic earth pressure disaster were advanced first time, and systematic earth pressure disaster happened in our country were divided into three types. Looking the kinetic energy releasing of mine tremor due to falling-in and it's destruction as key researching point, author established the static-dynamic-static couple numerical calculation method and formula system of mine tremor due to falling-in. In the research on kinetic energy releasing of mine tremor due to falling-in, the influence to kinetic energy releasing of falli...