摘要
在我国华北煤田石炭—二叠纪煤系地层的底部 ,存在着含水丰富的奥陶纪石灰岩。由于受采动的影响 ,煤层岩层的渗透能力会发生明显的变化 ,有时会导致承压水突入采空区。应用现场实验成果 ,利用有限元方法计算了底板岩体渗流场 ;在此基础上 ,进行了采动和渗流对煤层底板岩体稳定性影响的有限元分析计算。
Below Carboniferous-Permian coal-bearing formations in coal fields of North China, there is a stratum of Ordovician limestone containing an abundant supply of water. Because of the influence of mining, the permeability of footwall strata varies obviously. Confined water from Ordovician limestone might inrush into gob region. Based on in situ data, the permeability field of footwall rocks is evaluated by the finite element method (FEM). The influence of mining and seepage on footwall rocks is analyzed by the computer program of FEM.
出处
《地质与勘探》
CAS
CSCD
北大核心
2001年第5期91-93,共3页
Geology and Exploration
基金
国家自然科学基金项目资助 (NO .5 99740 15 )
