Abstract In the construction of underground engineering, the key-hole grouting method is first proposed in the treatment of high pressure water gushing problems of fractured rock mass. A key-hole optimization method of multilevel factors has been studied by analytic hierarchy process(AHP). In practical engineering applications,grouting holes have been optimal designed by conclusions of geological analysis and physical exploration. Then the key-hole optimization method is used to select holes. The grouting parameters have been designed referencing conclusions of interconnection test. Finally,a good plugging effect has been achieved by grouting. The key-hole grouting method has good popularized value to similar projects.
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Received: 31 January 2011
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