东欢坨矿8煤层顶板疏放水规律研究

发布时间：2018-06-17 20:53

  本文选题：顶板含水层 + 疏水钻孔　； 参考：《煤炭工程》2017年01期

【摘要】：为优化疏水钻孔布置与设计,提高钻孔疏放水实效,对开滦东欢坨矿北二采区8煤层顶板含水层疏水孔的出水规律性开展研究。理论分析了向斜仰起端构造控制下8煤层顶板充水含水层段赋存与富水规律,统计了32个疏水钻孔疏水量及其6个影响指标,研究了疏水量 时间动态特征、疏水量与影响因素之间的相关性。结果表明:针对8煤层顶板煤5以上0~30m范围内的沿倾向顺层水力联系好,沿走向水力联系差的直接充水含水层段,宜沿巷道走向分散布设钻窝,上下巷道钻窝宜错列布置;6个指标中钻孔的位置、钻孔初放水时间对钻孔出水量影响最为显著,钻孔与裂隙发育方向的关系对出水量也有明显影响;该区域疏水超前时间宜为8~10个月。
[Abstract]:In order to optimize the arrangement and design of hydrophobic boreholes and improve the effectiveness of borehole drainage, this paper studies the regularity of the drainage water of the roof aquifer of No. 8 coal seam in Bei No.2 mining area of Donghuantuo Coal Mine, Kailuan. In this paper, the occurrence and accumulation of water-filled aquifer section in roof of 8 coal seam under the control of syncline upside-end structure are analyzed theoretically, 32 hydrophobic boreholes and its six influencing indexes are counted, and the dynamic characteristics of hydrophobic capacity and time are studied. Correlation between hydrophobic capacity and influencing factors. The results show that for the direct water-filled aquifer where the roof coal of 8 coal seam is more than 0 ~ 30 m along the inclined bedding and the direct water-filling aquifer with poor hydraulic connection along the direction, it is appropriate to distribute the drilling nest along the roadway. The location of the borehole and the time of initial water release have the most significant influence on the water output of the borehole, and the relationship between the borehole and the developing direction of the fissure also has an obvious effect on the water output. The hydrophobic advance time in this area should be 810 months.
【作者单位】： 华北理工大学矿业工程学院;河北省矿业开发与安全技术重点实验室;
【基金】：河北省自然基金“司家营矿区基岩风化带渗透性动态研究”(D2015209327)
【分类号】：TD745.2
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本文编号：2032416