Situ Stress Measurement And Inversion LONGMENSHAN Mine

Longmen mountain mining area had no prior work carried out before the original rock stressmeasurement. Insufficient knowledge for three-dimensional geostress characteristics anddistributional regularity of the mining area, especially in mining area size and direction ofgeostress. As in deep mining, initial geostress plays an important role to under grand mining. Inthis paper, through on-site stress relief method by overcoring for the determination, confiningpressure calibration test, theoretical analysis and inversion of in-situ stress, initial stress werestudied in mining area.(1) Set of hole stress release method was applied to three three points in the central part ofthe mining area was tested, and get the three points of Three-dimensional initial geostress state.Ground stress field and the regularity of the mining area has a certain understanding. Establish amining area in platform.(2) According to Data results of the stress relief method by overcoring to calculate the stressellipse, based on the analysis of stress ellipse to mine roadway stability; Mining area of deepground stress state is obtained by geostress test results analysis which will provide a scientificbasis for underground engineering design, construction and Produce,such as the stability ofroadway maintenance and deep roadway design and other projects.(3) Rock gravity and tectonic stress as the independent variable, combined with the geostressmeasurement. Apply of multiple regression equation of geostress inversion. There was nosignificant difference with the actually measured value, the multivariate regression equation withthe engineering practice. Can be used as function throughout the mining area ground stress field.Under the condition of the original rock stress test data can’t be provide more, the mining areaground stress inversion can think can meet the requirements of the mine underground engineeringnumerical simulation.