淮南矿区潘北矿A组煤层首采工作面开采地质条件探查分析

淮南矿区A组煤层进入开采实施阶段,潘北矿A3层工作面作为全区首采面,其安全开采地质条件评价至关重要。针对矿区A组煤层特殊的地质条件,综合钻探及地球物理探查成果,运用无线电波透视以及三维并行电法技术,对潘北矿A3层首采工作面的煤层、构造及水文地质条件进行了分析与评价。其中无线电波透视技术解释工作面内7处构造异常,其中1处异常断层及裂隙发育、局部煤层变薄,对回采影响很大;并行电法技术发现顶板异常5处、底板异常3处,根据异常范围,分别圈定顶板3处、底板2处为重点防治水区域。该结论经钻孔验证可靠性较高。

Initial Working Face Mining Geological Condition Exploration and Analysis in Coal Group A,Panbei Coalmine

The coal group A in Huainan mining area begins to mining stage, as the initial working face in the mining area, the mining safety geological condition assessment of coal No.3 in Panbei coalmine is essential. In allusion to special geological condition of coal seams in group A, integrated drilling and geophysical prospecting results, using radio wave penetration and 3D parallel electrical tech-niques carried out initial working face coal seams, structures and hydrogeological condition analysis and assessment. The radio wave penetration method has interpreted 7 structural anomalies in the working face, one of them has found developed faults and fissures, coal seam thinned locally, thus may impact coal winning greatly. The parallel electrical method has found 5 roof and 3 floor anomalies;ac-cording to the range of anomalies has delineated 3 roof and 2 floor intensive water controlling limits. The dependability of results has been validated through drilling.