冻结壁形成特性综合分析方法在深井冻结精准调控中的应用  

Application of comprehensive analysis method of formation characteristics of freezing wall in precise control of deep shaft freezing

作　　者：陈道翀 高伟 李功洲 CHEN Dao-chong;GAO Wei;LI Gong-zhou(Beijing MKL Institute of Applied Technology,Beijing 100013,China;Beijing China Coal Mine Engineering Co.,Ltd.,Beijing 100013,China;China Electronics Engineering Design Institute Co.,Ltd.,State Development and Investment Corp.,Ltd.,Beijing 100142,China)

机构地区：[1]北京煤科联应用技术研究所,北京100013 [2]北京中煤矿山工程有限公司,北京100013 [3]国家开发投资集团有限公司,中国电子工程设计院有限公司,北京100142

出　　处：《煤炭工程》2020年第12期118-123,共6页Coal Engineering

摘　　要：冻结壁形成特性的精准预测预报与调控技术是深井冻结法凿井的重大技术难题之一。针对赵固二矿西风井深厚冲积层冻结过程更为复杂的调控情形,为了实现冻结壁形成特性精准预测预报和调控,科学指导冻结与掘砌施工,提出应用冻结壁形成特性综合分析方法,通过细化分解每日盐水运动状态因子,使其转化为动态的分析方法;引入等效冻结时间新概念,保持了综合分析方法的快捷分段计算;通过等效冻结时间应用的不断分析、调整,使复杂调控的冻结壁形成特性分析结果更接近于工程实际。应用表明,可实现实施的冻结壁有效厚度与设计的冻结壁有效厚度偏差小于2%,实施的冻结壁有效平均温度与设计的冻结壁有效平均温度偏差小于1℃,实施的井帮温度与设计的井帮温度偏差小于2℃。形成的冻结壁形成特性动态综合分析方法可精准实施冻结调控,满足快速施工的要求,为我国深厚冲积层冻结法凿井工程冻结壁形成特性的精准预测预报与调控提供了成功的经验。The accurate prediction and control technology of the formation characteristics of the freezing wall is one of the major technica lproblems in the deep shaft freezing sinking.The freezing process of deep alluvium in the West Ventilating Shaft of ZhaoguNo.2 Coal Mine is more complicated.In order to accurately predict and control the formation characteristics of the freezing wall and scientifically guide the construction of freezing and excavation,the comprehensive analysis method of the formation characteristics of the freezing wall is put forward,which can be transformed into a dynamic analysis method by refining and decomposing the state factors of daily salt water movement.The new concept of equivalent freezing time is introduced to keep the fast subsection calculation of comprehensive analysis method.Through the continuous analysis and adju stmentofthe a pplication of the equivalent freezingtime,the analysis results of the formation characteristics of the freezing wallwith co mplexregulation are closer to the engineering practice.The application shows that the deviation between the implemen tedand designed effective thickness of the fr eezing wall is less than 2%,the deviation between the implemented and designed effective average temperature of the freezingwall is less than 1℃,and the deviation between the implemented and designedshaft sidewall temperature is less than 2℃.The dynamic comprehensive analysis method of the formation characteristics of the freezing wall can accurately implement the freezin g control and meet the requirements of rapid construction.It provides a successful experience for the accurate prediction and control of the formation characteristics of the freezingwall of the deep alluvium in China.

关 键 词：冻结调控 等效冻结时间 动态分析方法 

分 类 号：TU265.3[建筑科学—建筑设计及理论]