深部高承压水地层裂隙岩体冻结温度场实测研究  

Monitoring and studying the freezing temperature field in deep fractured rock mass with high confined water

作　　者：李栋伟[1,2] 周艳[3] 靳鹏伟[4] 李阳[3] 张瀚[3] 

机构地区：[1]中国科学院寒区旱区与环境工程研究所冻土工程国家重点实验室,甘肃兰州730000 [2]福建工程学院土木工程学院,福建福州350108 [3]安徽理工大学土木建筑工程学院,安徽淮南232001 [4]湖南科技学院土木与环境工程学院,湖南永州425199

出　　处：《冰川冻土》2016年第1期140-144,共5页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金(41271071);国家重点基础研究计划973项目(2012CB026102);冻土工程国家重点实验室项目(SKLFSE201204);福建工程学院科研启动基金;湖南省教育厅重点项目(15A074)资助

摘　　要：通过深部高承压水地层冻结法凿井现场实测,获得矿井裂隙岩体各个层位测温孔的温度和盐水去回路干管温度变化规律.结果表明:测温孔实测温度在冻结初期呈线性下降规律;当温度继续降低到岩石的结冰温度以后,降温速率逐步增加;当冻结帷幕达到设计温度时,实测温度变化趋于平缓;外圈管外侧测温孔降温速率最慢,两圈管之间位置的测温孔降温速率最快;位于不同位置不同层位的测温孔降温速率不一致,其中位于92 m深度的卵石层(C1~#测温孔)降温速率为0.54℃·d^(-1),位于209 m深度的砂质泥岩(C3~#测温孔)降温速率为0.9℃·d^(-1);根据实测温度可以预测地层形成冻结帷幕的交圈时间、厚度、平均温度等冻结设计参数.深部裂隙岩体冻结温度实测资料对指导冻结帷幕设计与施工具有重要实践意义.Through the in-situ measurement of the mine sunken by freeze sinking in deep high-pressure water stratum,the temperatures of fractured rock mass monitored by thermometers allocated in various horizons and the variation of looping brine temperature were obtained.In the initial,temperatures in the monitoring holes dropped almost linearly.When temperature continuously decreased to the freezing temperature of the rock,the cooling rate gradually increased.When the frozen wall reached the design temperature,the monitored temperature changed gently.Cooling rate of the outside of the outer ring changed most slowly,and that between the two rings changed most fast.Cooling rate at different horizons and in different locations were inconformity,for example,cooling rate was 0.9 ℃ · d-1 at the temperature monitoring hole C3# of sandy mudstone at 209 m deep and cooling rate was 0.54 ℃ · d-1 at the temperature monitoring hole C1# of pebble bed at 92 m deep.Therefore,the design parameters such as the circle shift time,thickness and average temperature when frozen wall composed can be inferred from the monitored temperature.The monitored data have significant practical significance for guiding the design and construction of freeze sinking in deep fractured rock mass.

关 键 词：裂隙岩体 冻结法凿井 测温孔 冻结温度场 高承压水地层 

分 类 号：TD265.31[矿业工程—矿井建设]