摘要
煤田上覆岩层中含水直接对煤层的开采构成威胁.本文先从理论上阐述了电阻率勘探可以探测煤层上覆地层含水不均匀性的可能性,然后用简单的断层型薄层含水模型的CSAMT正演模拟结果展示出:地下200m深处,尽管只有20m厚的的含水岩层,但在电阻率剖面上该薄层的反映具有非常明显的特征.从理论上和数值模拟实例说明,一定深度内一定厚度的薄层含水性的电阻率法探测是可能的.
One always worries about the thin water-bearing rock layer upper on the coal layers, because this thin earth layer can cause the water disaster to the coal mineral. The paper introduces theoretically that electric method can prospect the water-bearing earth layer upper on the coal layers, and then shows the CSAMT forward modeling results for a fault thin water-bearing model that are produced by finite element method, it tells us: the response for the thin water-bearing which is on a certain depth is very clear on CSAMT profiles, even the thin layer is about 20 meters. The theoretical and forward modeling results both show that it is possible to prospect the thin water-bearing earth layer with electric methods.
出处
《地球物理学进展》
CSCD
2003年第4期707-710,共4页
Progress in Geophysics
基金
国家自然科学基金项目(40027001)资助.
关键词
煤层
含水性
高密度电法
CSAMT
探测
coal layer, water-bearing, high-density electric method, CSAMT, prospecting
