Study on the formation mechanism of the lime perilous rock in Guilin areas

Combining investigated work of the situation of geological disaster throughout the country, this paper has been a lot of researchs on formation mechanism by the perilous rock of lime rock in Guilin areas based on locale geological investigat, having an interview with the situation of a disaster and understanding environmental engineering geological conditions of the perilous rock of lime rock. At present, the main tasks have been done about the formation mechanism of the perilous rock of lime rock from landform and physiognomy, stratum lithology, geological structures, rock structure and karst development by selecting representational 9 mountains of the perilous rock of lime rock, combining a great lot of physicial and chemical parameters taken from representative the perilous rocks. There are 200 perilous rocks around 9 mountains of lime rocks, among the rest 22 ´the key perilous rock´ have been done researchs. Putting forward searching ´the key perilous rock´ is the key to prevent and control perilous rock. ´The key perilous rock´ is the first drop and collapse by itself, it is very dangerous rock. After ´the key perilous rock´ has dropped at first, the rest perilous rocks dropped as followed because of the changing of stress state and the existing of air face. Identifying quickly and accurately ´the key perilous rock´ is an important role to reinforcement and disposal perilous rock of lime rock in Guilin areas.