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Abstract Deep underground projects are usually connected with high in-situ stress environment. Based on the research on the evolution law of geologic construction for Pingdingshan mining area，local measurement information on in-situ stress of deep stratum were collected for the mining area，and the distribution of in-situ stress was analyzed. According to the type of in-situ stress field and the distribution characteristics for the mining area，spatial division was performed with three parts：Southwest area，I，where the self-weight stress field plays an important role in this area；Middle area，II，where the construction stress field is important，and the horizontal tectonics stress is faint；East area，III，where the construction stress field is important，and the horizontal construction stress field is important. Furthermore，the distribution characteristics and the relationships between the characteristics and geologic structures of each area were investigated. To validate the results of spatial division，hollow stress relaxation method was adopted，and in-situ stresses of nine points were tested locally at different positions and depths. It was found that the local measurement results are in good agreement with those of spatial division on in-situ stresses for the mining area. The result could provide dependable information for mine field exploration，laneway layout and support design of Pingdingshan mining area，and improve the scientific significance，rationality and reliability of engineering design.
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Received: 24 May 2013
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2014, Vol. 33 
