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为防止二1煤层顶板第三、四系底含水层,需要提前采取顶板水综合防治措施。根据周边钻孔及巷道实际揭露资料分别绘制基岩等厚线图、二1煤层距第四系底等值线图、二1煤层距第三系细砂等值线图、冒落带高度+10m等值线图、导水裂隙带+20m等高线图,以导水裂隙带高度+20m保护层不波及第四系底含水层,冒落带高度+10m保护层不波及第三系底含水层为标准,分析、圈定工作面受影响区域。重点对该区域进行钻孔探查、疏放,以地面疏水钻孔与井下探查钻孔相结合,对12205工作面区域顶板水进行探查、疏放。
In order to prevent the third and fourth strata aquifers of the second coal seam roof, it is necessary to take comprehensive measures to prevent and control roof and roof water. Based on the actual data of the surrounding boreholes and tunnels, the contour maps of bedrock are plotted respectively. The contour map of the second coal seam from the bottom of the Quaternary system, the contour map of fine sand of the second coal seam from the Tertiary, the height of the caving zone + 10m contour map, water-conducting fracture zone +20 m contour map to the water-bearing fracture zone height +20 m protective layer does not affect the Quaternary aquifer, the mining zone height +10 m protective layer does not affect the third line Aquifer as a standard, analysis, delineation of the affected area of the work surface. Focus on the region to drill exploration, dredging, with groundwater drilling and underground exploration drilling combined with the 12205 face area of the roof water exploration, dredging.