采煤工作面顺煤层透视的电法探测方法

为了解决采煤工作面煤层屏蔽或吸收高频电磁波不能有效透视较宽工作面的难题,提供了一种采煤工作面顺煤层透视的直流电法探测方法（简称层透视法）。通过研究直流电法AB-MN装置在工作面两巷道透视的探测方法原理,使用地电成像方法计算出工作面内部视电阻率的分布规律,由此探测工作面煤层内部的电性变化。其特点：透视距离较大,工作条件要求较低,对煤层电阻率有“放大”作用,属于非破坏性探测方法。应用证明：本方法适用于探测采煤工作面内部煤层变薄或缺失带、含水断层、高水压导水突水灾害性地质构造等,可为煤矿安全生产提供比较可靠的地质资料。

A DC electrical penetration method for prospecting the coal face alone the same coal layer

A DC electrical prospecting method that can penetrate the coal face alone the same layer in coal face between two roadways(layer penetration method) was put forward,in order to solve the difficult problem that the high frequency electromagnetic waves can’t penetrate the wide coal face because of the shielding or absorb by the coal seam．Based on studying the prospecting method and theory of DC electrical penetration between two roadways in working face by AB MN devices,the distribution regularity of apparent resistivity inside coal face was calculated by geo electrical imaging method,and then the electrical changes were detected.The method has many characteristics,such as:long penetration distance,less demanding working conditions,amplification of the resistivity of coal and non destructive detection.The applications show that the method is able to prospect the coal seam losing zone,the coal seam thinning zone,water bearing fault and the disastrous geological structure of water inrush by high pressure and etc.The method can provide the reliable geological data for safety production in coal mine.