Coordinate Projection Method's Computerization And Its Application To Stability Analysis Of The Structural Plane And Block

Based on coordinate projection theory, coordinate projection method has been computerized by means of object oriented programming in this paper. The corresponding software is named CPH. In view of further exploitation and visualization of it, CPH is programmed by VC++. In order to conquer the complexity and low efficiency of coordinate projection of block especially many blocks, CPH is put forward. CPH has three main functions as follows: determining structural planes occurrence; determining the geometry shape and number of potentially instable blocks; combining the elastic finite element atlas of plane problem in underground excavation, determining the safety factor of structural plane and block. The advantage of coordinate projection method is to analysis the stability of not only block but also structural plane and judge whether structural plane or block first collapses. Based on not collinear three points on the structural plane, structural plane equation can be determined correctly and thus its occurrence avoiding the error aroused by compass can be obtained. The above is just the innovation of the paper. The paper aims to underground excavation with circular arch and straight wall. By applying the research findings and CPH to Longtan hydroelectric station in Guangxi province and Nanwan reservoir in Henan province, CPH proves reasonable and valuable in the field of geomechanics and engineering. In addition, after being modified a bit, CPH can also be applied to slope and other underground excavations. Due to short time, visualization of CPH is not included in this paper, but CPH has provided platform for further exploitation. The trend and difficulty of the coordinate projection method and CPH are pointed out in the final of the paper in order to provide future research with references. Keywords: Coordinate projection method Block Stability VC++ CPH.