| Xiaojihan Coal Mine wants to solve the problem of coal production in coal mine,the method used is to reconstruct anti-deformation building before mining.For safety reasons,a test building on the surface above No.11205 working face in the first panel shall be used to carry out the influence test of mining area.Firstly,analyze the feasibility of building activities in the mining area,and then analyzes the surface near the test building and the deformation of the test building.1)Based on synthetically considering the degree of surface deformation and site selection,the anti-deformation design of the test building is carried out from the aspects of foundation treatment,foundation anti-deformation and superstructure anti-deformation.2)Based on the calculation of the height of the failure zone and the depth of the construction load,the stability and feasibility of the foundations in the mining area were analyzed.The results show that the new buildings will not damage the stability of the gob area and the surface is not Will occur again unevenly large subsidence.3)Periodic observation of the surface deformation was carried out and the observed data were summarized and analyzed.The surface experienced severe deformation with a degree of deformation reaching Grade IV and the test building remained intact,indicating that the building was resistant to the effects of the corresponding surface deformation.4)Periodic observations of the test building was carried out and the observed data were summarized and analyzed.The measured data showed that the test building experienced severe deformation and the test building remained intact,indicating that the building can resist the corresponding deformation of the building.The test buildings have experienced the three complete periods of surface deformation,the basic condition of the test building remained intact.Therefore,the test results by No.11205 working face can apply to the first panel and the whole mining area. |
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