Stability Analysis And Control Technology Of The New Road Under The Mined Area

As the rapid development of highway engineering, many highways will pass through the goaf of some mining areas. So the research of goaf is very important to highway engineering. According analyses and summarizes the predecessors' research achievement, the author gained some useful research results in order to serve for practical engineering and offer some available guidance.Firstly, the author comprehensive analyzed the relative research literature, explained the form of goaf and the basic characters and rules of rock movement, and summarized the sink pattern theories. Also, the author uses randomized medium theory to calculate the surface sink value, horizontal movement and deformation value. So, we can estimate the effect of the goaf and then decide whether the goaf needs to be treated or not. The author also build a simple but practical analysis model of goaf underlying highway adopting relative modeling methods of finite element and then carried through stability analysis of the model using ANS YS, a large universal finite element analysis software. The analysis achieved good results.Secondly, the author systematically discussed the methods to define treatment width and depth of goaf underlying highway to be built, put forward a way to define the treatment depth according to make sure if the load affect depth and fallen fissured zone height are coincided. Also, the author discussed the common methods to treat goaf and suggested a new way, which use clay-cement slurry to filling the goaf, as well as make a feasibility analysis.The research achievement will make a preferably direction to practical treatment project.