SOME KEY QUESTIONS IN THE FORMATION OF GROUND FISSURES IN THE FEN-WEI BASIN

The Fen-Wei basin is the most serious area of the ground fissure formation in China.This paper summarizes the distribution regularity of ground fissures in the basin.It analyses several key questions in the formation of ground fissures and emphasizes the origin of geotectonic ground fissures,puts forward some research ways as follows.By multi-disciplinary method,the distribution regularity of ground fissures and the relations to active tectonics are researched,and the tectonic ground fissures geological structural model is built.Through the modern numerical simulation with the high-precision observation techniques,the mechanical mechanics of ground fissures started by tectonization as well as the coupling rupture mechanics of tectonization and pumping actions are studied.Based on the observation data from GPS,the formation of the ground fissures on Qinghai-Tibet continent and the continent in north China,the intrinsic relations between regional ground fissures and the Chinese continental dynamics are studied,and the mechanism and model of continental drive force and the geological hazard are disclosed.