| Sandaogou Mine is located in the northwest of the genus Fugu County, Shaanxi Province in the Loess Plateau, the large coal mining height coal seam buried depth shallower bedrock on thin coal seam mining in the western Loess typical representation. Mined explore its surface subsidence law, and its subsidence threat risk forecast analysis has important implications for loess region in Western Mining Subsidence Law.In this paper, the existing mining subsidence theory and stability analysis of mined-out area as a guide to Sandaogou Mine 85201 Face of a mining area in situ data and geological and topographical data as a basis for writing papers. First, according to the mining process collected 85201 Face stations relevant information, including monitoring points measured data, geological and topographical data mining, coal seam distribution and other essential features of the mine, the above data to collate and summarize the analysis are summarized Sandaogou Mine a goaf ground displacement and deformation law. Secondly, the analytical method, regression analysis and computer simulation method of risk assessment index Surface goaf calculation and analysis of relevant results. In the analytical method, the use of probability integration method is expected to determine the parameters, combined with "three of" mining procedures selected correlation coefficient; in the regression analysis, we introduce the solution to the problem of missing data on the expected duration of surface movement logarithmic linear model fitting; numerical simulation method, the depth of the coal seam, coal seam thickness and the amount of face advance the impact of surface subsidence were analyzed. Finally, the results obtained by the three methods combined to Sandaogou a surface coal mine subsidence Gob comprehensive risk prediction and analysis, and conclusions based on an analysis of mine safety, mine ecological environment protection and construction of ground raised reasonable suggestions. |
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