“三堵两注”本煤层瓦斯抽采封孔技术研究
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摘要
针对新景矿3216工作面本煤层瓦斯抽采效果较差的问题,提出了"三堵两注"本煤层瓦斯抽采封孔技术。该技术分为密封和封堵裂隙两个步骤,对此技术进行了地面和井下试验。结果表明,注浆处全部充满浆液无空隙,密封效果良好。"三堵两注"封孔技术的瓦斯抽采效果相较于传统封孔技术有较大提升,抽采瓦斯浓度平均为58.71%,是对照孔的1.43倍;抽采瓦斯浓度达50%以上的比例是80%,是对照孔的2.67倍。
In view of the poor efficiency of gas in-seam drainage in the 3216 working face of Xinjing coal mine, three blocks and two injections sealing technology is proposed. The technology includes two steps of sealing and blocking. and the technology is tested both on the surface and underground. The results show that the grouting is completely filled without tiny rift and the sealing effect is good. The efficiency of gas drainage with three blocks and two injections technology is greatly higher compared with the traditional one. The average gas concentration is 58.71%, which is 1.43 times of the previous one, and more than 80% of the sealed boreholes created gas concentration of 50% or above, 2.67 times higher than that of the reference one.
In view of the poor efficiency of gas in-seam drainage in the 3216 working face of Xinjing coal mine, three blocks and two injections sealing technology is proposed. The technology includes two steps of sealing and blocking. and the technology is tested both on the surface and underground. The results show that the grouting is completely filled without tiny rift and the sealing effect is good. The efficiency of gas drainage with three blocks and two injections technology is greatly higher compared with the traditional one. The average gas concentration is 58.71%, which is 1.43 times of the previous one, and more than 80% of the sealed boreholes created gas concentration of 50% or above, 2.67 times higher than that of the reference one.
引文
[1] 张彦克,陈学习,杨庚宇,等.顺煤层聚氨酯-胶囊带压注浆封孔测压技术[J].煤炭技术,2016,35(10):186-188.
[2] 申茂良,陈学习,徐永,等.胶囊-水泥浆-聚氨酯联合带压注浆封孔测压技术[J].煤炭技术,2016,35(08):204-206.
[3] 陈学习,张亮,毕瑞卿,等.聚氨酯—胶囊二次注浆封孔测压技术[J].华北科技学院学报,2016,13(02):1-6.
[4] 赵学军,霍晓林,邱国良.万峰煤矿抽采钻孔封孔方法对比试验研究[J].煤炭技术,2018,37(10):225-227.
[5] 谭永福.抽采钻孔“二堵一注”带压封孔技术的研究与应用[J].煤矿安全,2017,48(06):135-137+141.
[6] 杨宏民,杨峰峰,陈向军.穿层钻孔“两堵一注”囊袋式快速封孔自动测压技术[J].煤矿安全,2015,46(05):78-80.
[7] 王志明,刘广超.囊袋式注浆封孔法钻孔支护作用分析[J].煤炭技术,2015,34(09):177-179.
[8] 令狐建设,王玉禄,张淦星.新型囊袋式注浆封孔器在阳煤集团的研发与应用[J].煤炭技术,2015,34(05):152-153.
[2] 申茂良,陈学习,徐永,等.胶囊-水泥浆-聚氨酯联合带压注浆封孔测压技术[J].煤炭技术,2016,35(08):204-206.
[3] 陈学习,张亮,毕瑞卿,等.聚氨酯—胶囊二次注浆封孔测压技术[J].华北科技学院学报,2016,13(02):1-6.
[4] 赵学军,霍晓林,邱国良.万峰煤矿抽采钻孔封孔方法对比试验研究[J].煤炭技术,2018,37(10):225-227.
[5] 谭永福.抽采钻孔“二堵一注”带压封孔技术的研究与应用[J].煤矿安全,2017,48(06):135-137+141.
[6] 杨宏民,杨峰峰,陈向军.穿层钻孔“两堵一注”囊袋式快速封孔自动测压技术[J].煤矿安全,2015,46(05):78-80.
[7] 王志明,刘广超.囊袋式注浆封孔法钻孔支护作用分析[J].煤炭技术,2015,34(09):177-179.
[8] 令狐建设,王玉禄,张淦星.新型囊袋式注浆封孔器在阳煤集团的研发与应用[J].煤炭技术,2015,34(05):152-153.