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Abstract Based on data mining and feature extracting of the source data of the in-situ stress field?s characters，and combined with the technology of multi-source information integration，the analytical method of multi-source information integration for in-situ stress field is proposed. And the method is organized by three gradational steps：the first time of multi-source information integration for the source data of the in-situ stress field?s characters→calculation of multi-source information integration→the second time of integration，feedback information integration. The calculation of multi-source information integrationis is carried out combining with uniform design and hybrid algorithm of simulated annealing and particle swarm optimization. This method is applied to simulate the in-situ stress field of Baihetan hydropower station，and the calculated results are consentaneous with the testing results. Meanwhile，the rock-core disking phenomenon when drilling and spalling phenomenon in the testing tunnel during excavation is compared with calculated results. It is shown that the proposed analytical method of multi-source information integration for in-situ stress field from the two sides of stress?s magnitude and azimuth，is reasonable and practicable.
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Received: 16 April 2012
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2012, Vol. 31 
