郭屯煤矿主井冻结法凿井信息化监测技术研究

Monitoring of Freezing Shaft Sinking in Ultra-Deep Alluvium of Guotun Coal Mine

郭屯煤矿主井冻结冲积层厚度为587.5 m,是目前世界上冻结冲积层厚度最大的井筒.凿井过程中,为保证冻结壁和井壁安全,实现安全快速施工,开展了信息化施工技术研究.通过现场实测,获得了凿井过程中上部已成型外层井壁段的温度、受力与变形,掌握了深部冻结井壁的径向荷载、钢筋轴力、混凝土应变的变化规律.在此基础上,评价冻结壁和井壁的安全状况,为凿井过程中的工程决策提供了科学依据.实测成果表明,冻结井筒外层井壁径向荷载受深度、土层特性、冻结情况和井壁结构等因素的影响.本文成果对于深厚冲积层建井工程有重要意义,为探索深部(冻)土的力学特性积累了丰富资料.

The freezing alluvium depth of main shaft of Guotun Mine is 587.5m,which is the deepest of the world.In order to guarantee the safety of the frozen wall and the shaft wall and achieve rapid construction in the process of shaft sinking,we studied the informatization construction technology.The temperature,shaft load and deformation of completed outer shaft wall were monitored so as to grasp the changing rules of radial load,reinforcement stress,and concrete strain,of the deep shaft.On this basis,the evaluati...