分层开采注氮置换上分层采空区瓦斯技术研究

发布时间：2018-04-15 07:00

本文选题：分层开采 + 综放开采　；参考：《煤炭科学技术》2017年01期

【摘要】：针对灵泉矿巨厚煤层下分层综放开采时,上分层泄水巷中的瓦斯极易进入下分层上平巷内的问题,采用从下分层上平巷向泄水巷中打钻孔注氮置换瓦斯的技术措施,通过CFD数值模拟了上分层泄水巷及采空区内的瓦斯运移规律,求出了合理的注氮参数,分析了不同注氮速率、注氮间距时泄水巷内瓦斯浓度的变化。结果表明:注氮参数变化时,瓦斯在泄水巷内的分布规律存在差异性;当钻孔间距为30 m、注氮量为800 m3/h时,置换瓦斯的效果最佳。最终将合理的注氮参数应用于工业现场,下分层开采时不再出现瓦斯超限的现象。
[Abstract]:In view of the problem that the gas in the upper stratified drainage roadway is easy to enter the upper layer and the upper roadway when fully mechanized caving under the thick coal seam of Lingquan Mine, the technical measures of nitrogen injection and gas replacement by drilling into the drainage roadway from the lower layer and the upper roadway are adopted.By means of CFD numerical simulation of gas migration law in upper stratified drainage roadway and goaf, reasonable nitrogen injection parameters are obtained, and the variation of gas concentration in drainage roadway with different nitrogen injection rate and spacing is analyzed.The results show that there are differences in the distribution of gas in the drainage roadway when the nitrogen injection parameters change, and when the borehole spacing is 30 m and the nitrogen injection amount is 800 m3 / h, the effect of gas replacement is the best.Finally, the reasonable nitrogen injection parameters are applied to the industrial site, and the gas overrun is no longer seen in the next stratified mining.
【作者单位】：煤炭科学研究总院开采研究分院;天地科技股份有限公司开采设计事业部;煤炭科学研究总院;扎赉诺尔煤业有限责任公司;
【基金】：国家自然科学基金青年基金资助项目(51504135) 煤炭科学研究总院科技创新基金资助项目(2015ZYJ001) 中国煤炭科工集团公司科技创新基金资助项目(2014MS034)
【分类号】：TD712

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