INFLUENCE OF WINDOW SIZE ON H-H CONNECTIVITY ESTIMA-TION MODEL

Connectivity can reflect the penetration of fractures in rock mass, and is one of the key parameters of slope stability evaluation. It is of great significance to the prevention and control of engineering geological disasters. H-H connectivity estimation model is based on the principle of H-H trace length estimation model, and is extended to the calculation of lock length. The H-H estimation model belongs to the rectangular window method. When the trace length is estimated by the window method, the results will be affected by the window scale. When the method is extended to the connection rate calculation, the influence of the window scale should be taken into account. Experimentation area is Changchun Jingyue Economic Development Zone Dongsheng quarry, obtain the slope geometry information using digital photogrammetry technology, set the window length of slope inherent length, respectively set the window height is 1, 2, 3, 5, 8, 10, 15, 20, 30meters 9 scale to calculate the connectivity rate, the calculated results were 0.57, 0.35, 0.21, 0.16, 0.10, 0.09, 0.06, 0.05, 0.03 respectively. The results show that with the increase of the window height, the calculation results are reduced gradually, and the window scale has a significant influence on the calculation results.