Research On The Unloading Rock Cliffs In Chongqing

Thesis in Chongqing typical hard rock cliffs as the research object, based on engineering geological survey analysis to Nanchuan Zhen child rock, Wanzhou Taibai rock, for example, using the methods of mathematical statistics and univariate analysis, analyzed the slope height, slope structural loft and intensity on unloading rock band width.Numerical simulation, the theoretical model calculation as the means to establish the Chongqing area of hard rock cliffs unloading planar and wedge shape with a dip angle of unloading zone calculation model: the theoretical calculation and the model is applied to calculate the angle of the cliffs unloading zone in order to test the research results of this paper is reasonable and reliable.The main results and conclusions are as follows:(1)On the basis of the Chongqing area typical of hard rock cliffs on the investigation, based on the relationship between the width of the scarp slope, slope height, statistical conclusions loft structure, rock strength, as well as the factors set forth separately and unloading zone. Presents a linear analysis of the characteristics of the cliffs and unloading zone between the four factors.(2)Analysis of the slope and high loft structure, size, strength rock cliffs of hard rock in the process of unloading slope with developmental role, in which the greatest impact on the slope, slope height minimal impact; describes the unloading zone development and verification mechanism is controlled by a scarp slope by numerical simulation method that scarp slope unloading belt slip into development mechanism-curved, slip- pressure-induced tension type, bending tension type three type numerical simulation types.(3)Chongqing area of hard rock cliffs planar unloading zone, the actual situation of the wedge-type unloading zone and stability of discrimination, equal to a limit equilibrium stability calculations, the projected planar unloading wedge shape with a dip and unloading zone inclination, combined with field investigation judge verified.