蒙陕矿区白垩系地层冻结壁厚度设计研究  

Study on Design of Freezing Wall Thickness in Cretaceous Strata of Inner Mongolia-Shanxi Mining Area

作　　者：王建平 叶建民 刘晓敏 管增伦 李昆 姚蔚利 王楷 

机构地区：[1]天地科技建井研究院,北京100013 [2]煤矿深井建设技术国家工程实验室,北京100013 [3]中煤能源集团有限责任公司,北京100120

出　　处：《建井技术》2016年第2期25-28,24,共5页Mine Construction Technology

基　　金："十二五"国家科技支撑计划资助项目(2012BAB13B02)

摘　　要：针对目前蒙陕矿区白垩系地层冻结壁厚度设计中控制层深度随意确定、冻结壁力学模型任意选取等的混乱状况,通过对该矿区白垩系地层力学性质特点与20多个相关井筒案例的分析与研究,提出了该矿区白垩系地层冻结壁厚度设计原则:计算冻结壁厚度的控制层应为白垩系底部岩层,冻结壁力学模型应选用无限长弹塑性厚壁圆筒,冻结壁荷载应为静水压力。并根据此原则,对该矿区已施工的21个冻结井筒进行了验算。结果表明:作者提出的蒙陕矿区冻结壁厚度设计原则,适用于该矿区白垩系地层冻结壁厚度设计。该设计原则对西部地区类似地层冻结壁厚度设计具有指导意义。According to an optional determination of a control layer thickness in the design of the freezing wall thickness in the Cretaceous strata of the present Inner Mongolia-Shanxi Mining Area,an optional selection of the freezing wall mechanics model and other confusion condition,with the analysis and study on the mechanics property features of the Cretaceous strata in the Mining Area and over 20 related mine shaft cases,a design principle of the freezing wall thickness in the Cretaceous strata of the Mining Area was provided.The control layer to calculate the freezing wall thickness should be the Cretaceous bottom strata,the freezing wall mechanics model should select and apply an infinite elasticplastic thick wall cylinder and a freezing wall load should be a hydrostatic pressure.According to the principle,a checking calculation was conducted on the 21 mine freezing shafts constructed in the mining area.The results showed that the design principle of the freezing wall thickness in Inner Mongolia-Shanxi Mining Area provided by the paper could be suitable to the design of the freezing wall thickness in the Cretaceous strata of the mining area.The design principle would have the guidance references to the design of the freezing wall thickness in the similar strata in the west part of China.

关 键 词：蒙陕矿区 白垩系 冻结壁厚度 含水砂岩 冻结壁力学模型 

分 类 号：TD265.31[矿业工程—矿井建设]