1. The experience of water danger reclamation in synclinal axis illustrating at T312 working face is introduced.

2. Tianmen Mountain is an integrated synclinal geological unit which has the landform of middle-mountain karst platform with peak groups and canyons.

3. Synclinal oil and gas pools have been discovered in the Tertiary, Gretaceous, Jurassic, Triassic and Permian rocks in the Songliao, Bohai Bay, Ordos and Sichuan basins in China.

4. Spacings between anticlinal crests and synclinal troughs in the be equal in some series of folds.

5. The experience of waterreclamation in synclinal axis illustrating at T 312 working face is introduced.

6. The Sankeng geothermal field is located on the northeastern side of the Wuchuan-Sihui deep fault and in the Sankeng synclinal karstic basin.

7. The Doulishan coal-mining district is an irregular triangle compound synclinal basin with a complex hydrogeologic setting. There are five karst collapse belts in the coal-mining district.