Key Construction Technology of Vertical Feeding Bore Hole for Solid Materials in Backfilling Coal Mining

摘要：   为了提高充填采煤固体物料垂直投料井施工速度及成孔质量，基于固体物料垂直投料井结构特征，分析了投料井成井技术难点，并研究了投料孔施工、投料管安装，以及投料孔测斜等一整套施工工艺。结果表明，采用多级钻进扩孔、浮板法下管和多种测斜相结合的工艺可确保投料井施工质量。该工艺在我国某煤矿进行了应用，投料井钻进速度达6 m/d，垂直度为1‰。

关键词: 综合机械化固体充填采煤；投料井施工；成孔

Abstract:   To increase the construction speed and hole quality of vertical feeding bore hole for solid materials in backfilling coal mining，based on analyzing the structure characteristcis of vertical feeding system，we analyzed the technological difficulties in drilling of vertical feeding system，and studied a set of construction techniques including the job practice，the pipeline installation，the method of inclination surveyor，et al．The results show that when using the technology which covers multistage drilling and chambering method，heavy crane or frame crane and float panel sinking method，and a variety of lateral deformation methods，the construction quality of vertical feeding system can be guaranteed．The technology has been successfully applied to a coal mine in China，while the bore hole driving speed can be reached to about 6 m/d，and the verticality is 1‰．

Key words: fully mechanized backfilling coal mining with solid material；construction technology of vertical feeding bore；bore hole performing