【作者】 郝世俊；

【导师】 石智军；

【作者基本信息】 煤炭科学研究总院 ， 矿产普查与勘探， 2007， 博士

【摘要】 瓦斯抽采对煤矿安全生产和能源利用有重要意义,目前我国煤矿瓦斯抽采的主要方法有钻孔法和巷道法。对于容易成孔的硬煤层采取本煤层钻孔预抽瓦斯,对于难成孔的松软煤层采取邻近层岩石长钻孔、穿层钻孔以及巷道抽采。上述方法存在的问题是钻孔法有效抽采孔段长度短、终孔孔径小、抽采效果差,巷道法施工工期长、费用昂贵、不利于瓦斯利用。本文针对上述我国煤矿瓦斯抽采方法普遍存在的问题,在以下3方面进行了试验研究工作:(1)设计了两种强造斜组合钻具并在阳泉矿区试验,施工出造斜强度1.2°/m以上的大直径拐弯钻孔,使穿层钻孔在卸压带高瓦斯浓度区域的孔段大幅度延长,终孔孔深64.8m,终孔孔径153mm,钻孔瓦斯抽采效果比常规穿层钻孔有显著提高;(2)对稳定组合钻具进行了理论分析,并将研究成果在晋城、铜川矿区试验,完成了目前国内顺煤层钻进深度最深的865m的顺煤层长钻孔,终孔孔径153mm,钻孔瓦斯抽采效果比常规顺层钻孔有显著提高;(3)针对煤矿井下定向钻孔测孔数据处理工作量大的问题,利用Visual Basic编制了水平孔测点坐标计算及输出钻孔轨迹的程序,程序和实测点轨迹拟合程度好,可操作性强,可用于指导煤矿井下水平定向孔施工。通过以上工作得出结论:研制的强造斜组合钻具用于穿层瓦斯抽采孔,钻孔瓦斯抽采效果比常规穿层钻孔有显著提高,部分瓦斯抽采参数优于倾斜高抽巷:经过理论分析设计的三种典型稳定组合钻具,在顺煤层钻孔试验中取得良好的试验效果,钻孔顺煤层钻孔最深达到865m;编制的煤矿井下水平定向孔测点数据处理和轨迹模拟程序,可以节省大量的人工工作量,高效实用。更多还原

【Abstract】 coalbed gas Discharge is very important for mining safely, borehole and laneway play a leading role of coalbed gas discharging in China. Drilling borehole in hard coal seam is mostly used to discharge gas,and cross layer borehole, roof rock borehole and laneway are mainly used to discharge gas in soft coal seam. The effect of gas discharging is limited by length ,diameter of borehole in coal seam and high cost of laneway development.Aimed at aboved-mentioned key problems, The research of this paper mainly focus on following aspects: firstly, designed strongly deflecting assembled drilling rigs and tested its function in Yangquan mining area, accomplished six large diameter bent boreholes with more than 1.2°/m the deflecting intensity, increase the length of borehole in crack zone from 10m to 16m with 153mm terminal diameter. secondly, calculated, analyzed and tested three kinds of the stabilized assembled drilling rigs in Jincheng and Tongchuan mining area, accomplished the longest borehole in coal seam in China, and the length of borehole is up to 865m with 153mm terminal diameter, the effect of gas discharging with new drilling rigs is significantly improved than that with traditional drilling rigs. Thirdly, compiled program by Visual Basic for processing measured data and outputting trail of borehole. The outputed trail is accord with measured trail, and can be used to guide drilling directional borehole.The conclusions of research show that drilling borehole can greatly improved the effect of gas discharging by the horizontal directional drilling technology and the strongly deflecting drilling technology, some discharging parameters show that the effect of discharging is better with large diameter bent borehole than that of with traditional borehole and the laneway. The program can be use to effectively process measured data of borehole and output trail of borehole.更多还原