沿海高渗流砂层立井井筒冻结事故分析  

Analysis on freezing accident of vertical shaft in coastal high permeability sand stratum

作　　者：蔡光辉 陈鑫源 王恒 张成涛 Cai Guanghui;Chen Xinyuan;Wang Heng;Zhang Chengtao(Laizhou Ruihai Mining Co.,Ltd.,Yantai 265400,China;Henan Coal Science Research Institute Co.,Ltd.,Zhengzhou 450001,China;Beijing China Coal Mine Engineering Co.,Ltd.,Beijing 100013,China)

机构地区：[1]莱州市瑞海矿业有限公司,山东烟台265400 [2]河南省煤炭科学研究院有限公司,河南郑州450001 [3]北京中煤矿山工程有限公司,北京100013

出　　处：《能源与环保》2021年第8期32-36,共5页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：山东省技术创新自主项目(202010606029);北京中煤矿山工程有限公司自立科技项目(202005)。

摘　　要：针对高地下水流速低结冰温度的砂性地层中冻结井筒冻结壁不交圈情况,以沿海地区某副井冻结为例,分析了冻结设计中冻结壁厚度、平均温度、冻结孔分布和深度等参数不合理之处,并提出了选取建议,同时对冻结期间盐水温度进行了统计。研究表明,机组配置不够、盐水进回水温度差过大是造成冻结壁未交圈的人为控制因素,认为在冻结施工全过程中排除人为因素干扰是冻结工程成败的关键之一。Aiming at the non-intersection of the freezing wall of the freezing shaft in the sandy formation with high groundwater flow rate and low freezing temperature,taking the freezing of an auxiliary well in coastal areas as an example,the freezing wall thickness,average temperature,freezing hole distribution and depth in the freezing design were analyzed.The parameters were unreasonable,and suggestions for selection were put forward,and the salt water temperature during freezing period was counted.Studies had shown that insufficient unit configuration and excessive temperature difference between brine inlet and return water were the artificial control factors that cause the freezing wall to fail to cross the circle.It was believed that eliminating the interference of human factors during the entire freezing construction process was one of the keys to the success of the freezing project.

关 键 词：高渗流 冻结壁 交圈 冻结设计 人为控制 

分 类 号：TD262.1[矿业工程—矿井建设]