关键词: CAD, 离散点预计, 扩展属性, 参照块

Abstract: In the process of "three-under mining" research, it is often necessary to predict mining subsidence at discrete points of surface distribution in order to obtain specific values of movement and deformation of buildings and provide basis for design of underground mining scheme and prediction of damage level of surface buildings. According to the conventional prediction methods and technical means, the acquisition, organization and modification of basic data in the prediction process are inefficient and error-prone. In order to solve the above problems, this paper proposes to create attribute workface and discrete point reference block in AutoCAD, extract and construct workface prediction parameter data file and discrete point data file through AutoLisp program, and then call probability integral method prediction program to obtain discrete point prediction results. At the same time, relevant commands such as attribute extension, discrete point prediction and drawing discrete point movement and deformation curve are developed, and the program design and software implementation are carried out.