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第九届国际岩石力学大会于１９９９年８月在法国巴黎召开。会议的主题分成４大部分，每一部分又分成若干个分支。这次会议的主题及会议论文的主要内容如下所述。１应用岩石力学──环境安全和控制 （１）环境保护 涉及采矿引起的地面沉降，地下工程对环境的影响，废弃矿井的安
The 9th International Conference on Rock Mechanics was held in Paris, France, in August 1999. The theme of the conference is divided into 4 parts, each part is divided into several branches. The main topics of this meeting and conference papers are as follows. 1 Applications Rock Mechanics ─ ─ Environmental Safety and Control (1) Environmental protection involves the ground subsidence caused by mining, the environmental impact of underground works, the safety of abandoned mines