Sulphide minerals as well as gangues in these deposits have suffered intense pressure solution, and the sulphides have undergone multi_stage overgrowth.

Through an analysis of the basic characteristics of pressure solution of carbonate rocks, the authors present the thickness restoration principle and formula of pressure solution carbonate rock and discuss the organic matter abundance correction method and formula of stylolite.

On the basis of the experiments and Our theoretical analysis of electrochemistry, it isfound that inside the conductive minerals in contact with solutions in the shallow crust, there arevarious ga1vanic cells, and the pressure solution of conductive mineral is realized by the process ofthe stress galvanic ce.

According to compacting process of tamper device,this paper presents the principle of compaction is compressible compaction,the physical model of tamper is plane linkage mechnism,so provides theoretical foundation for design the tamper mechanism for paver.

With the improvement of casting automation, the technology of high pressure compaction molding has been adopted more and more extensively in practice.