Received May 17, 1994,Revised , Accepted , Available online

Volume 7,1995,Pages 491-501

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The earth is an integral dynamic system , geologic environment and human engineering- technicaland economic activities constitute another complicated dynamic system ; geologic mineral resources are limited ,and there is a limit to the geologic environment capacity too; the human engineering - technical and economicactivities have exerted an unprecedented influence on earth. The laws of geologic environment deepen andraise man′s ability to prevent and control the geologic disasters and improve the environment should be understanded.

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