According the data between direct tensile test and arc splitting test of ten kinds of rocks,the rule of 3-D stress because of central angle of arc loading area is analyzed;and adopting 3-D tensile strength principle to analyze the samples,.

Discreteness of splitting tensile strength of marble is very great and it is influenced by the factors such as heterogeneous,splitting type and size effect and so on.

Based on researches on characteristics of the He125 fault,the authors have found that the arcuate fault is parallel to the fault strike and is the combination of fault-trough and fault-ridge,as evidenced from the profile.

The arcuate fault is the combination of fault trough and fault ridge,it is found from the section that is parallel to the arcuate,the fault can be separately divided into three parts,vertical-slip part,dip-slip part and horizontal-slip part from the section that is perpendicula.

Dynamic stress concentration of SH-waves by arc cracks near a circular lining;

The reason of arc crack on retarder gear surface was analyzed by means of chemical composition analysis,hardness testing,macrostructure and microstructure examination.

Based on the characteristics in the strength of coal seam under the action of the ground pressure, the impact coal cutting is achieved in the coal winning technique by using the impact cutting tool to impact, split and cut the coal on the coal wall.

To the cracks on the bottom of the slabs,the effect of water is just like the uniform forces assigned on the crack face which lead to the cracks to split.

Plain high strength concr ete and plain normal strength concrete,fiber high strength concrete and fiber no rmal strength concrete were tested respectively with split test and their capaci ty to resist propagation of.