瓦斯抽采“两堵一注一排”新工艺技术
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摘要
为提高瓦斯抽采钻孔的抽采浓度,实现煤矿瓦斯回收利用,针对现有的"一体式囊袋两堵一注"封孔器漏气问题,对其工艺进行改进,设计出"两堵一注一排"封孔装置,并进行井上试验研究和井下工程试验,对比分析2种封孔器的抽采效果。结果显示:井上试验"两堵一注一排"新工艺注浆段密实,"一体式囊袋两堵一注"出现明显的空白段;井下在相同煤层条件下,"两堵一注一排"新工艺抽采90天平均瓦斯体积分数为75%,"一体式囊袋两堵一注"抽采瓦斯体积分数为55%。
For the sake of increasing the extraction concentration of gas extraction drilling and achieving gas recovery and utilization of coal mine,the paper was aimed at improving the existing process of " onepiece bladder double plugging and one injection" plugging process. A new type of " two plugging,one injection and one discharge" was sealing device designed and made. Laboratory researches and downhole engineering experiments were conducted to compare and analyze the effects of the two types of plugging devices. The results show that the grouting section of the " two plugging,one injection and one discharge" new process in the in-hole experiment is dense,but there is an obvious blank section in the " integrated pouch double plugging and single injection",that under the same coal seam condition,the average gas volume fraction is 75% in 90 days with the new process of " two plugging,one injection and one discharge",but the volume fraction is 55% with the existing process.
For the sake of increasing the extraction concentration of gas extraction drilling and achieving gas recovery and utilization of coal mine,the paper was aimed at improving the existing process of " onepiece bladder double plugging and one injection" plugging process. A new type of " two plugging,one injection and one discharge" was sealing device designed and made. Laboratory researches and downhole engineering experiments were conducted to compare and analyze the effects of the two types of plugging devices. The results show that the grouting section of the " two plugging,one injection and one discharge" new process in the in-hole experiment is dense,but there is an obvious blank section in the " integrated pouch double plugging and single injection",that under the same coal seam condition,the average gas volume fraction is 75% in 90 days with the new process of " two plugging,one injection and one discharge",but the volume fraction is 55% with the existing process.
引文
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[9]王婷.囊袋式“两堵一注”带压注浆排水排气封孔技术[J].煤,2017,26(6):24-25,35.WANG Ting.Bag type“two sealing and one grouting”with pressure grouting drainage and exhaust sealing technology[J].Coal,2017,26(6):24-25,35.
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[12]张福旺,范付恒,秦汝祥.囊袋式两堵一注封孔装置在顺层钻孔瓦斯抽采中的应用[J].煤炭工程,2013,45(11):57-59.ZHANG Fuwang,FAN Fuheng,QIN Ruxiang.The application of two injection sealing devices in the hole gas extraction in the bedding[J].Coal Engineering,2013,45(11):57-59.
[13]李辉,郭绍帅,苏勋.分体式囊袋注浆封孔器的研制与应用[J].中国安全科学学报,2018,28(1):112-117.LI Hui,GUO Shaoshuai,SU Xun.Development and application of split bag grouting device[J].China Safety Science Journal,2018,28(1):112-117.
[14]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(5):152-153.LINGHU Jianshe,WANG Yulu,ZHANG Ganxing.Research and application of new capsule bag grouting sealing device in Yangquan Coal industry(Group)Co.,Ltd[J].Coal Technology,2015,34(5):152-153.
[2]周心权.基于瓦斯爆炸事故剖析突发事件应急处置的重要性[J].煤炭科学技术,2014,42(1):40-43.ZHOU Xinquan.Analysis of emergency management importance based on mine gas explosion accidents[J].Coal Science and Technology,2014,42(1):40-43.
[3]郭玉森,林柏泉,吴传始.低瓦斯矿井瓦斯爆炸事故的主要原因及防治对策[J].中国安全科学学报,2007,17(5):53-57.GUO Yusen,LIN Baiquan,WU Chuanshi.Main causes and preventing strategies to gas explosion accidents in low gas mines[J].China Safety Science Journal,2007,17(5):53-57.
[4]俞启香,程远平.矿井瓦斯防治[M].徐州:中国矿业大学出版社,2012:97-98.
[5]徐超,刘辉辉,邹伟.浅谈我国煤矿瓦斯抽放技术[J].山东煤炭科技,2010,28(2):196-198.XU Chao,LIU Huihui,ZOU Wei.Discussion on gas drain technology in Chinese coal mine[J].Shandong Science and Technology,2010,28(2):196-198.
[6]王兆丰,刘军.我国煤矿瓦斯抽放存在的问题及对策探讨[J].煤矿安全,2005,36(3):29-32,44.WANG Zhaofeng,LIU Jun.Problems and countermeasures of gas drainage in coal mines in China[J].Safety in Coal Mines,2005,36(3):29-32,44.
[7]朱克仁.“两堵一注”瓦斯封孔工艺存在的问题及解决对策[J].能源与环保,2017,39(1):182-185.ZHU Keren.Problems of“two sealing and one grouting”gas hole-sealing technology and its solutions[J].China Energy and Environmental Protection,2017,39(1):182-185.
[8]王兆丰,武炜.煤矿瓦斯抽采钻孔主要封孔方式剖析[J].煤炭科学技术,2014,42(6):31-34,103.WANG Zhaofeng,WU Wei.Analysis on major borehole sealing methods of mine gas drainage boreholes[J].Coal Science and Technology,2014,42(6):31-34,103.
[9]王婷.囊袋式“两堵一注”带压注浆排水排气封孔技术[J].煤,2017,26(6):24-25,35.WANG Ting.Bag type“two sealing and one grouting”with pressure grouting drainage and exhaust sealing technology[J].Coal,2017,26(6):24-25,35.
[10]王重文,连现忠.瓦斯抽采钻孔“两堵一注”带压封孔技术及装置研究[J].世界科技研究与发展,2016,38(2):357-359,370.WANG Zhongwen,LIAN Xianzhong.Researches on pressurized sealing method of“two sealing and one grouting”and sealing device of gas drainage borehole[J].World Sci-tech R&D,2016,38(2):357-359,370.
[11]宋宇辰,张朋伟,吕旭明.两堵一注装置在封孔技术中的研究与应用[J].煤矿机械,2015,36(8):261-264.SONG Yuchen,ZHANG Pengwei,LYU Xuming.Research and application of two sealing and one grouting equipment in sealing technique[J].Coal Mine Machinery,2015,36(8):261-264.
[12]张福旺,范付恒,秦汝祥.囊袋式两堵一注封孔装置在顺层钻孔瓦斯抽采中的应用[J].煤炭工程,2013,45(11):57-59.ZHANG Fuwang,FAN Fuheng,QIN Ruxiang.The application of two injection sealing devices in the hole gas extraction in the bedding[J].Coal Engineering,2013,45(11):57-59.
[13]李辉,郭绍帅,苏勋.分体式囊袋注浆封孔器的研制与应用[J].中国安全科学学报,2018,28(1):112-117.LI Hui,GUO Shaoshuai,SU Xun.Development and application of split bag grouting device[J].China Safety Science Journal,2018,28(1):112-117.
[14]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(5):152-153.LINGHU Jianshe,WANG Yulu,ZHANG Ganxing.Research and application of new capsule bag grouting sealing device in Yangquan Coal industry(Group)Co.,Ltd[J].Coal Technology,2015,34(5):152-153.