论文部分内容阅读
本文简介了边界元法的基本思想及其在岩石力学中的发展概况。本文在美国明尼苏达大学教授Crouch提供的TWOFS程序的基础上,利用改进的TEW程序,以某钨矿的试验区段为实例,结合钨矿地压研究的实践经验,通过输入现场实测的指标,对其单、双采场模型的不同埋深、不同初始应力条件下的8个计算方案,进行了平面应变问题的边界单元法计算。 经过计算,初步探讨了钨矿单、双采场开采后形成空场时,采场周边及围岩内部的应力和位移分布特点。其部分的结果,与长期以来有关单位在现场进行的大量调查和实测的成果,以及实验室中其它模拟工作的结果大体上吻合。本研究为探讨钨矿地压活动特征,提供了一种新的分析途径,并为深入分析该矿和其他钨矿的应力与位移规律,提出了一些有意义的结果。 由于这项工作是初次开展,经验不足,尚感对短边单元安排不够合理,因而影响到双采场模型中短边周边应力的精度,有待今后改进。
This paper briefly introduces the basic idea of boundary element method and its development in rock mechanics. Based on the TWOFS program provided by Professor Crouch of the University of Minnesota, this paper uses an improved TEW program, taking a test section of a tungsten mine as an example, combined with the practical experience of tungsten pressure study, by inputting the field measured index, The calculation of the boundary element method for the plane strain problem is carried out by using the eight calculation schemes under the different burial depth and different initial stress of single and double stopes. After calculation, the stress and displacement distribution around the stope and surrounding rock in the formation of an empty field after the mining of single and double stopes of tungsten ore are tentatively discussed. The results of this section are in broad agreement with the results of a large number of surveys and measurements conducted by the relevant agencies on the site for a long time and the results of other simulations in the laboratory. This study provides a new approach to the analysis of the characteristics of ground pressure in tungsten mines and provides some meaningful results for further analysis of the stress and displacement laws of the ore and other tungsten mines. Since this work was carried out for the first time and lack of experience, it is still not sensible for short-side unit arrangements to affect the accuracy of short-periphery stress in the double-stope model to be improved in the future.