中文摘要：

分析岩体和山体稳定性的主要问题也就是确定结构面及临空面之间的相对位置关系及组合方式。坐标投影作图法是一种以正投影为基础，以分析岩石工程中结构面的几何关系及由其切割出来的块体的稳定性为目的的图解方法。对于弯曲结构面，采用“以直代曲”的原理，将其简化为有限个小平面的集合体进行分析。以蛇蟠岛国际旅游度假村清风洞室群1号洞为例，采用坐标投影作图法对弯曲结构面进行分析，来解决弯曲结构面几何条件的描述和确定问题。

英文摘要：

It is very important to determine the relative ubiety and combination of discontinuities. Besides traditional projection on equatorial plane and numerical methods,a new method,coordinate projecting method,can be used in stability analyses of the blocks coordinate projection. It is important to simplify curved discontinuities as the collection of limited small planes when analyzing curved discontinuities. The Qingfeng cavities in Shepandao is given as an example to analyse curved discontinuities with coordinate projection.