松散承压含水层载荷传递机理的实验研究  

Experiment on Load Transfer Mechanism of Unconsolidated Confined Aquifer

作　　者：娄金福[1] 许家林[1] 庄德林[1] 蔡东[1] 

机构地区：[1]中国矿业大学能源与安全工程学院,江苏徐州221116

出　　处：《采矿与安全工程学报》2007年第1期47-50,共4页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(50374066);教育部"新世纪优秀人才支持计划"资助项目(NCET-05-0478)

摘　　要：利用专门设计的实验模拟装置,首次就松散承压含水层的载荷传递机理进行了实验研究.通过实验结果的对比分析,得出由于承压水的流动性和补给作用,松散承压含水层对载荷的传递起很大作用.有松散承压含水层时,上覆表土层的载荷通过松散承压含水层均匀地作用于下部基岩上,开挖过程中,基岩顶界面上的载荷基本保持恒定;无松散承压含水层时,基岩顶界面上的表土层载荷随煤层开挖而显著降低.结果表明,有松散承压含水层时两关键层复合破断,无松散承压含水层时,两关键层由下而上分步破断.By using the specially designed simulator for unconsolidated confined aquifer, experiments on the load transfer mechanism of unconsolidated confined aquifer were carried out for the first time both at home and abroad. The simulation results indicate that the unconsolidated confined aquifer plays a crucial role in the process of load transfer because of its fluidness and replenishment in time. The overburden soil layer loads are exerted uniformly on the bedrock through the unconsolidated confined aquifer, making the load keep a constant during the excavation process. However, the similar simulation shows that, without the unconsolidated confined aquifer, the load exerted on the bedrock decreases obviously during the excavation activity. Therefore, both of the two layers of key strata will be broken simultaneously if the unconsolidated confined aquifer exists, or they will be broken respectively from bottom to up if the unconsolidated confined aquifer does not exist.

关 键 词：松散承压含水层 载荷传递机理 关键层复合破断 相似材料模拟 

分 类 号：TD325[矿业工程—矿井建设]