Research On Regulation Of Surface Movement And Deformation In Mountain And Repeated Mining

With China’s rapid economic development, the demand for coal resources getting stronger, With the increase of the amount of coal mined, the major mining area have entered into the deep coal mining, while the repeat mining lead the movement and deformation of surface more serious. The majority of our mountain contains a large number of coal resources, because of the large fluctuation in mountainous terrain, ground movement and deformation is not the law. So study the surface movement and deformation in mountain repeated mining is very important.This article is based on Taiyuan Coal Gasification Co., Ltd. Jia Lequan coal, Entering into the observatory in its9101work surface, Observation of the Surface Movement and Deformation caused by the9#coal mining, we have get large amounts of data from many times the regular observations. Through data processing, analysis, and combined with the observational data have been observed2#and8#coal, to strike and to calculate the parameters of the layers of coal and found that the measured parameters do not fully comply with repeated mining law. Based on the mountain model that He Wanlong teacher has established, analysis of the impact of mountainous terrain, and get rid of the mountainous region, has been the repeated mining parameters that similar to the ground model, and analyzed its own rules, the following conclusions: (1) The impact that mountainous terrain on the ground movement and deformation is mainly reflected in the horizontal direction, which is moving horizontally, resulting in the asymmetry of the horizontal movement, while repeatedly mining impact on ground movement and deformation is mainly reflected in the vertical direction, which is sinking, resulting in the sinking increase.(2) The characteristics of surface movement in mountain repeated mining is maximum subsidence and subsidence factor is significantly increased, no matter positive slope, or the counter-slope, subsidence increased in, only the slope surface subsidence value-added, the relatively flat areas of surface subsidence increment is small and the sinking value of some of the valley region but decreased, while Horizontal movement is irregular, Positive slope, the horizontal movement significantly increased, anti-slope region is significantly reduced, and even point to the direction of the coal pillar.(3) Prediction is an important content for surface movement and deformation, the key to the prediction is the selection of parameters, relative to the measured parameters, this article is on the basis of the model in the mountain, established the improvement method that use mountain model to strike a parameter, let the request parameters and the measured parameters into the probability integral method for calculation and accuracy is significantly improved, especially the horizontal movement, further description of the mountainous terrain on the horizontal movement of a greater impact.