Study On The Foundation Of Bearing Capacity By Simulation Experiments In Jiaozuo Coal Mining Subsidence Area

With the large amount of coal resources collected from the underground,the area of coal mining subsidence in China is increasing year by year.At the same time,due to the accelerated development of China's urbanization and industrialization process,the problem of urban construction land is increasingly prominent.In order to reasonably plan and use subsidence area of land resources,some mining city put the coal mining subsidence area as construction land.Taking into account the safe use of the building in the coal mining subsidence area,it is necessary to determine the bearing capacity of the foundation of the coal mining subsidence area.Therefore,to carry out of coal mining subsidence area foundation bearing force analysis and research for the rational development and utilization of coal mining subsidence area of land resources,improve the subsidence area of land utilization,and the collapse of safe use of building area has important significance.Firstly the related factors affecting the effect of coal mining subsidence area foundation bearing capacity were analyzed and summarized.Then by coal mining subsidence area foundation deformation control index,combined with the foundation and deformation and the bearing force between the relationships of to foundation settlement based on the coal mining subsidence area foundation bearing capacity determination standard.According to the geological and mining conditions about a mine of Jiaozuo coal mining area,using UDEC numerical simulation software for subcritical mining and supercritical mining under two conditions of coal mining subsidence area model partitioning the load test,and the regression analysis method for determine the coal mining subsidence area in different regions of the bearing capacity of foundation.Then combined with similar material simulation test,using the XJTUDP Photographic measurement system,the foundation bearing capacity of the similar model of the coal mining subsidence area under the supercritical mining condition about a mine of Jiaozuo coal mining area was analyzed.Finally,based on the "code for design of building foundation " on the foundation settlement calculation method,the calculation formula of foundation bearing capacity,combined with the coal mining subsidence area foundation bearing capacity determination standards and building load influence depth,calculate the coal mining subsidence area of central foundation bearing capacity.The research results of this paper have a certain theoretical guidance and reference value for the calculation and determination of the foundation bearing capacity of coal mining subsidence area.