瞬变电磁法在导水裂缝带高度探测中的应用

一般情况下,对导水裂缝带高度的确定主要借助经验公式法、钻孔实测法、周边煤矿类比法、数值模拟和相似材料物理试验等传统方法.为科学制定水害防治措施,以杭来湾煤矿30103回采工作面为研究对象,在以往通过钻孔实测导水裂缝带高度的基础上,引入了瞬变电磁探测方法.通过对探测结果进行分析和解读,确定301盘区分层开采条件下,采厚为...

Application of transient electromagnetic method in detecting the height of water flowing fracture zone

In general,the determination of the height of the water conduction fracture zone is mainly based on traditional methods,such as empirical formula method,borehole measurement method,analogy method,numerical simulation calculation and similar material physical test.In order to formulate water disaster prevention and control measures scientifically,taking 30103 working face of Hanglaiwan coal mine as the research object,the transient electromagnetic detection method is introduced based on the measured height of water flowing fracture zone by drilling.Based on the analysis of the detection results,it is determined that under the condition of slicing mining in 301 panel,when the mining thickness is 4.8 m,the height of water flowing fracture zone is 118 m,and the ratio of fracture zone height to mining height is 24.6,which is basically consistent with the measured data of borehole.This method has the advantages of low cost,high efficiency,simple operation and reliable results,which can provide the basis for the risk assessment of water inrush in mining face and the prevention and control of roof water disaster.