Characteristics of joints in karst area and their influence on karstification in Zhangfang in Fangshan region of Beijing

doi:10.7523/j.issn.2095-6134.2014.06.009

Abstract

Abstract:

Zhangfang area of Beijing is a typical example of the North China karst area, and the research on characteristics of joints and their impacts on karst and water enrichment is of great significance. In this paper, we attempt to study the characteristics of joints and discuss their influence on karstification with the method of probability and structural analysis. The earth's surface joint data that we use are got from geological surveys. Joints in this region have great influences on the karst development:1) the development extension of joints controls the extension and plane shape of karst development; 2) the oblique joints are favourable to the development of grikes and karst fracture zones while the intraformational joints are beneficial to the development of small and medium-sized interlayer karst caves; 3) the density of joints affects the degree of karst development; 4) joints filling with hard corrosion substance will restrain karst development while joints that filling with easy corrosion substance will be conducive to karst development; and 5) joints which formed early are more advantageous to the development of karst caves than the late joints.

Key words: karst region, joints, characteristics of development, karstification, Zhangfang area of Beijing

CLC Number:

P542+.33

DONG Ying, JU Yiwen, ZHANG Yuxiu, RUI Xiaoping, BU Hongling, GUO Gaoxuan. Characteristics of joints in karst area and their influence on karstification in Zhangfang in Fangshan region of Beijing[J]. , 2014, 31(6): 783-790.

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