There exist a complex brittle fracture system and a tectonic stress field within 2000 m of the mainhole.
在主孔2000米之内，存在复杂的脆性破裂系统和构造应力场。
2
The main arch's mainhole and the both sides abdomen arch the eyelet is 20 red stone arches juxtaposes becomes.
主拱的主孔和双方的腹拱洞里形成并排20红石拱门。
3
The close study of the core rocks from 100 - 2000m of the mainhole of the Drilling has revealed that the major lithological types are: (1) Eclogites and garnet pyroxenites;