Soft Broken Roadway Control Technology Of Xin An Coal Mine

Coal mining depth increases every year, followed by the problem of large deformation, high pressure, difficult support issues in a deep roadway, especially in soft roadway. How to control the stability of deep soft roadway is becoming a big problem recognized by home and abroad scholars, attracting widespread attention. As one of the world's few countries with rich experience in coal, in addition to the introduction of foreign advanced technology, china also consent exploration and innovation, and go deep in the soft rock theory and practice and reach the world advanced level. The objective of this article is as follow:through the geological data of deep coal mine of Xin An, get a knowledge of the class of soft rock roadway which causes the deformation of soft road way in Xin an mine, and gets a further understand of the mechanism of deformation of soft rock, and then simulate the model in different ways by using numerical methods, and optimize a variety of targeted supporting parameters,then proposed a control method of rock deformation in deep,rich and develop the technologies for the stability of deep rock then provide us a theoretical foundation and a relevant filed examples.Rock tunnel based on the extent of damage and ability to continue to deformation in extraction space can be divided into four regions; in this paper, plastic and shape soft model is being used to establish the support system of the nonlinear mechanical model in deep soft rock tunnel, and obtains the analytical solution of broken zone, shaping zone. Elastic zone and the original stress zone. Using the analysis of numerical simulation of deep excavation, we get the soft rock stress and displacement distribution and the deformation of soft rock tunnel in three different sections without supporting condition, and get the best choice. After the choice of sections, we choose a seasonable supporting manner among three supporting methods to make the supporting system better by followed adjustment. In on-site observation, according the displacement and stress contour, companied by the experiment of anchor and cable pullout test, the deformation mechanic of the surrounding rock and the stress analysis of the supporting system are founded. It provides the date to the simulations. Xin An mine's actual support provide people a theoretical basis, gets a better social and safety benefits and provide us some soft road supporting experiment.