龙游牛场古洞室群熨斗形岩柱工程问题探究

龙游牛场古洞室群隶属国家重点文物保护单位龙游石窟,该古洞室群蕴含着一系列古工程结构亮点。为研究1号洞熨斗形岩柱的受力特性,文章借助Geomagic软件分别建立设置熨斗形岩柱和矩形等截面岩柱的古洞室群三维模型,然后用Abaqus软件进行有限元网格划分,最后利用FLAC 3D软件对其在自重下的位移和应力进行分析。结果表明:与矩形岩柱相比,熨斗形结构的岩柱对牛场古洞室群的下沉量和应力值有不同程度的降低,原有的熨斗形岩柱更具有稳定性和受力科学性。这证明了古人设置熨斗形岩柱比普通的矩形岩柱更有利于古洞室群的长期稳定。

Analysis for interaction of supports and surrounding rock of gateways in longwall minging

Gateway supporting in long wall mining has been a problem that restricts the mine production and safety, the paper sets up an interaction model between support and surrounding rock (rock mass structure) and probes the elementary theory about ground pressure behaviors of gateway. Based on the analysis of supporting theories, some new viewpoints about gateways supporting and ground pressure controlling are put forward.