The Rule Of Deformation-Failure And Evolution Analysis Of Subgrde & Pavement Of Freeway In Stope Area

Due to the long history of underground mining in the mid-west part of our country where is rich in mineral resources, the finished stope is largely distributed. As the needs of China's Western Development Program, Promotes Old Industrial Base,Middle Rises, Sustainable development policy and the self-development of city contribution, many roads and railways must start or across from those finished stope, which bring us the problem of instability and damage of subgrade and pavement when the finished stope sink. Background on this situation, depending on the entity engineering, we give a reach to the rule of deformation-failure on subgrade and pavement of Finished Stope and its treatment.In the respects of subgrade and pavement of freeway finished stope, this paper summarized the influencing factor of its deformation and instability, its deformation analysis methods, its deformation rule and its treatments of deformation and instability from both home and aboard. Based on the different types of deformation and instability of subgrade and pavement, combining with its deformation influencing factor, we sum up the basic rule of its deformation through use of Tongji Software of GeoFBA@V3.0. Then we conclude the generally treatments and coordinated design methods of finished strope subgrade and pavement, which include finished strope groundwork treatment, subgrade coordinated design methods and pavement design methods. Meanwhile, we integrate those methods with the engineering examples; apply the corporation design method of finished strope subgrade and pavement, and propose some design suggestions on the typical subgrade and pavement area, such as, finished strope, high filling, parking, foundering, etc.Through the analysis of the deformation-failure rule on subgrade and pavement of Finished Stope and control engineering examples, based on the engineering examples of coal mine finished stope on Chaoyang ditch Yudeng freeway, Liubei temple parking, its ditch high filling, and Zhengxi coal mine foundering, we analyze the subgrade and pavement from the aspects of whole deformation, stress and strain, shear strain increment, maximum and minimum principal stresses. Meanwhile, we also analyze the typical profile and pavement, contrasting the numerical analysis results with field monitoring results, and give an evaluation and treatment at last.Through the preliminary study of this paper, we hope it can give certain consultation to deformation control engineering research, design and construction in the subgrade and pavement of freeway finished stope, and realize disaster prevention and mitigation.