A Study On The Feasibility Of Construction Of A Mined-out Area In Chengde Yingshouyingzi

With the continuous development of the national economy, the need to build more buildings and structures, as the ground for the building restrictions in some areas of industrial plants and residential buildings can only be built on top of old goaf.Some major projects had to cross the goaf, such as some large-scale railway projects.Therefore carry out a feasibility study on the site of old goaf building is a serious problem.Author by reading a lot of Chinese and foreign journals and literature review of research on the ground movement and the old goaf venue construction feasibility is expected described.At the time of writing this paper,in the collection,study, based on datamining to determine the research to develop arigorous technical route.According surface deformation monitoring data, the use of probability integration method and finite element analysis software goaf venue construction feasibility studies and achieved some results.1.A study area venues flat, complex formation, seam dip angle, fault formation in development. Which at different times of the old mining goaf staggered distribution,influence each other. After the completion of coal mining in the mine goaf by strike and dip of two main sections were established to monitor horizontal and one vertical line, two lines transverse to monitor the average spacing of 50 m, three monitoring points to monitor online access to a total of 55 valid data. The use of monitoring data processing EXCEL settlement curve is generated, as the two evaluation methods following test.2.Before goaf surface construction of buildings, based on the principles of probability integration method, using MATLAB software development related engineering calculation program that calculates the value of surface residual deformation. The calculated data import SURFER software generates contour map, to judge the stability of its various regions, and to determine the appropriate scope of the construction of buildings. Including distribution west of the square in the industrial Midwest and northwest, south of the proposed main plant, east of the proposed coal yard, unstable region in the southwest corner,the basic stability of the southern area of the proposed main plant and only intendedmain plant was built in the northern part of the east-west direction banded stable distribution.3. Through the above analysis of the findings, detailed geological surveys to select six sections, the use of nonlinear finite element theory to model, analyze the gob roof and overlying rock and soil below the surface in the gravity stress vertical displacement,destruction of overlying rock internal situation the magnitude of the stress and displacement at different locations. The results showed that: the unstable region: Located east of Industrial Square, the proposed main plant southwest, basically in the middle of mined-out area; less stable region: unstable region with the majority located in the area between the relatively stable area; basically stable area: distributed west of the square in the industrial Midwest and northwest, south of the proposed main plant, east of the proposed coal yard,unstable region in the southwest corner, south of the proposed main plant; the stable region:Only in the proposed master plant in northern distribution to narrow east-west strip.