迁安市长城金矿Ⅰ号矿体帷幕注浆工程超硬地层的钻探施工方法

Drilling methods for ultra-hard stratum for the curtain groutingproject of No. Ⅰ ore body of Great Wall Gold Mine, Qian’an

摘要:

迁安市长城金矿Ⅰ号矿体帷幕注浆工程是一大型的帷幕注浆项目，该矿区地质结构复杂，施工中帷幕钻孔钻遇白云岩超硬“打滑”地层，该地层钻进进尺缓慢，对项目工期影响很大，故在施工过程中针对该地层采用各种施工工艺进行试验，并以实际钻进过程中采集的钻头类型、钻进工艺及钻进参数等数据，分析得出一套最有效的钻探方法，为该地区日后矿区勘查、二期帷幕钻探施工提供参照依据。

Abstract:

The curtain grouting project of No. I ore body of Great Wall Gold Mine in Qian’an is of a large-scale, and the geological structure of this mine area is complex. When curtain drilling entered the ultra-hard “slippery” dolomite stratum, the penetration rate became low, which greatly affected the construction schedule. Therefore, various construction technologies have been tested for this stratum in the drilling process, and with the analysis based on the data collected about drill bit types, drilling technologies and drilling parameters in the real drilling process, the most effective drilling methods have been established, which can provide good reference for future prospecting and the second stage curtain drilling project in this area.