矿井音频电透视技术探查顶板砂岩水——以济三煤矿为例

The voice frequency electric perspective technique for detecting top sand water:A case study at Jisan coal mine

超前探查并正确处理煤层上覆含水层异常,是确保矿井安全生产的重要工作之一。应用矿井音频电透视技术,对济三煤矿二叠系山西组3煤层顶板砂岩及侏罗系蒙阴组底部砾岩充水含水层进行了探测。探采对比分析表明:在地层垂向结构相同,横向相对均一的情况下,视电导率值越高、异常幅度越大,地层的含水性越强;工作面回采涌水区段相对于物探异常位置滞后明显;涌水量的大小与音频电透视的视电导率值、异常幅度正相关。

In Jisan coal mine the NO. 3 coal seam top sandstone of Permian Shanxi Formation and the bottom conglomerate of Jurassic Mengyin Formation are mainly aquifer,which has obvious characteristics not only in nonhomogeneity but also in strip chart. It is one of important work to detect and deal with these anomalous geologic body rightly in order to insure safety production and improve production efficiencies. The comparison result indicated that when vertical structure of strata is similar and homogeneous in horizontal direction, the higher apparent resistivity and higher abnormal range, the more water is contained in the strata. The water yield is correlated to apparent electric conductivity and abnormal range of voice frequencv electric perspective.