深部低透煤层瓦斯抽采钻孔封孔方式研究
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摘要
针对深部低透煤层瓦斯抽采钻孔封孔质量差的问题,分析了我国煤矿瓦斯抽采主要封孔方式技术特点以及存在的问题,认为巷帮及钻孔周围煤体应力"三带"分布、贯通裂隙发育情况及合理封孔深度的研究不够透彻,注浆压力和时间不足,钻孔应力失稳流动通道闭合、塌孔、淤塞等情况无法有效防治,是造成瓦斯抽采封孔效果不理想的主要原因。提出了研究扰动影响下钻孔周围煤体贯通裂隙发育情况,合理封孔深度,提高"两堵一注"囊袋堵头强度、注浆压力和时间,实施二次封孔以及孔壁支护等方面的改进对策,对深部矿井提高瓦斯抽采效率和安全生产具有重要的理论和现实意义。
Aiming at the problem of poor sealing quality of gas drainage boreholes in deep low permeability coal seams,the technical characteristics and existing problems of main sealing methods for gas drainage were analyzed in coal mines in China.It was considered that the study on stress distribution in three zones,development of through cracks and reasonable sealing depth around roadways and boreholes was not thorough enough,and grouting pressure and time were insufficient,and the flow passage of borehole stress instability was closed.The main reason for the unsatisfactory sealing effect of gas drainage was that the situation of closure,collapse and silting can not be effectively prevented and cured.It was of great theoretical and practical significance to improve gas extraction efficiency and safe production in deep mines by studying the development of coal seam through cracks around boreholes under the influence of disturbance,reasonable sealing depth,increasing the strength,grouting pressure and time of "two plugs and one injection" bag plug,implementing secondary sealing and hole wall support.
Aiming at the problem of poor sealing quality of gas drainage boreholes in deep low permeability coal seams,the technical characteristics and existing problems of main sealing methods for gas drainage were analyzed in coal mines in China.It was considered that the study on stress distribution in three zones,development of through cracks and reasonable sealing depth around roadways and boreholes was not thorough enough,and grouting pressure and time were insufficient,and the flow passage of borehole stress instability was closed.The main reason for the unsatisfactory sealing effect of gas drainage was that the situation of closure,collapse and silting can not be effectively prevented and cured.It was of great theoretical and practical significance to improve gas extraction efficiency and safe production in deep mines by studying the development of coal seam through cracks around boreholes under the influence of disturbance,reasonable sealing depth,increasing the strength,grouting pressure and time of "two plugs and one injection" bag plug,implementing secondary sealing and hole wall support.
引文
[1] 张国枢.通风安全学[M].徐州:中国矿业大学出版社,2011.
[2] 俞启香.矿井瓦斯防治[M].徐州:中国矿业大学出版社,1992.
[3] 魏风清,连少朋,张川,等.孟津煤矿顺层抽采钻孔合理封孔深度[J].河南理工大学学报(自然科学版),2013,32(6):686-690.Wei Fengqing,Lian Shaopeng,Zhang Chuan,et al.Study on reasonable hole-sealing-depth down the seam of Mengjin Mine[J].Journal of Henan Polytechnic University(Natural Science),2013,32(6):686-690.
[4] 尚群.赵庄矿3号煤层瓦斯抽采钻孔合理封孔深度研究[D].焦作:河南理工大学,2010.
[5] 申宏敏,毛桃良,张雷林,等.基于钻屑理论的抽采钻孔合理封孔深度研究[J].煤矿安全,2014,45(8):39-41,45.Shen Hongmin,Mao Taoliang,Zhang Leilin,et al.Research on reasonable sealing hole depth of extraction borehole based on drilling cuttings theory[J].Safety in Coal Mines,2014,45(8):39-41,45.
[6] 何俊,董开元.大断面煤层巷道瓦斯抽采钻孔合理封孔深度研究[J].中国煤炭,2014(2):101-104.He Jun,Dong Kaiyuan.Research on rational sealing depth of gas drainage borehole in large section roadway[J].China Coal,2014(2):101-104.
[7] 魏引尚,梅振华.采空区瓦斯分布与蓄热区位置判定[J].煤炭安全,2009,40(11):32-34.Wei Yinshang,Mei Zhenhua.Methane distribution and determine location of thermal storage in gob[J].Safety in Coal Mines,2009,40(11):32-34.
[8] 陶斌.李雅庄矿顺层钻孔两堵一注带压注浆封孔技术[J].煤,2018,27(1):44-45.Tao Bin.Sealing technology of two blockages and one injection with pressure grouting for bed drilling in Liyazhuang Coal Mine[J].Coal,2018,27(1):44-45.
[9] 高振勇.二次注浆封孔技术对提高瓦斯抽采效率的应用研究[J].煤炭技术,2017,36(10):141-143.Gao Zhenyong.Application of secondary grouting sealing technology to improve gas extraction efficiency[J].Coal Technology,2017,36(10):141-143.
[10] 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(6):135-137,141.Tan Yongfu.Research and application of "two-sealing and one-grouting" hole sealing technique with pressure for extraction boreholes[J].Safety in Coal Mines,2017,48(6):135-137,141.
[11] 王伟,刘啸,付红波.高瓦斯矿带压注浆封孔工艺应用研究[J].能源与环保,2017,39(3):99-102,107.Wang Wei,Liu Xiao,Fu Hongbo.Study on application of pressure grouting sealing technology in high gassy mine[J].China Energy and Environmental Protection,2017,39(3):99-102,107.
[12] 胡胜勇,刘红威.煤层瓦斯抽采钻孔漏气机理及应用研究进展[J].煤矿安全,2016,47(5):170-173.Hu Shengyong,Liu Hongwei.Leakage mechanism of coal seam gas drainage borehole and its application research progress[J].Safety in Coal Mines,2016,47(5):170-173.
[13] 靳随军.高瓦斯工作面自燃发火事故处理与教训[J].煤矿安全,2005,36(8):26-28.Jin Suijun.Spontaneous combustion accidents treatments and lessons in gassy faces[J].Safety in Coal Mines,2005,36(8):26-28.
[14] 罗伙根,李振兴.保德煤矿顺层瓦斯抽采钻孔封孔工艺研究[J].煤炭工程,2017,49(S2):88-90.Luo Huogen,Li Zhenxing.Study on sealing pore technique of gas drainage hole in-seam in Baode Mine[J].Coal Engineering,2017,49(S2):88-90.
[15] 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.
[2] 俞启香.矿井瓦斯防治[M].徐州:中国矿业大学出版社,1992.
[3] 魏风清,连少朋,张川,等.孟津煤矿顺层抽采钻孔合理封孔深度[J].河南理工大学学报(自然科学版),2013,32(6):686-690.Wei Fengqing,Lian Shaopeng,Zhang Chuan,et al.Study on reasonable hole-sealing-depth down the seam of Mengjin Mine[J].Journal of Henan Polytechnic University(Natural Science),2013,32(6):686-690.
[4] 尚群.赵庄矿3号煤层瓦斯抽采钻孔合理封孔深度研究[D].焦作:河南理工大学,2010.
[5] 申宏敏,毛桃良,张雷林,等.基于钻屑理论的抽采钻孔合理封孔深度研究[J].煤矿安全,2014,45(8):39-41,45.Shen Hongmin,Mao Taoliang,Zhang Leilin,et al.Research on reasonable sealing hole depth of extraction borehole based on drilling cuttings theory[J].Safety in Coal Mines,2014,45(8):39-41,45.
[6] 何俊,董开元.大断面煤层巷道瓦斯抽采钻孔合理封孔深度研究[J].中国煤炭,2014(2):101-104.He Jun,Dong Kaiyuan.Research on rational sealing depth of gas drainage borehole in large section roadway[J].China Coal,2014(2):101-104.
[7] 魏引尚,梅振华.采空区瓦斯分布与蓄热区位置判定[J].煤炭安全,2009,40(11):32-34.Wei Yinshang,Mei Zhenhua.Methane distribution and determine location of thermal storage in gob[J].Safety in Coal Mines,2009,40(11):32-34.
[8] 陶斌.李雅庄矿顺层钻孔两堵一注带压注浆封孔技术[J].煤,2018,27(1):44-45.Tao Bin.Sealing technology of two blockages and one injection with pressure grouting for bed drilling in Liyazhuang Coal Mine[J].Coal,2018,27(1):44-45.
[9] 高振勇.二次注浆封孔技术对提高瓦斯抽采效率的应用研究[J].煤炭技术,2017,36(10):141-143.Gao Zhenyong.Application of secondary grouting sealing technology to improve gas extraction efficiency[J].Coal Technology,2017,36(10):141-143.
[10] 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(6):135-137,141.Tan Yongfu.Research and application of "two-sealing and one-grouting" hole sealing technique with pressure for extraction boreholes[J].Safety in Coal Mines,2017,48(6):135-137,141.
[11] 王伟,刘啸,付红波.高瓦斯矿带压注浆封孔工艺应用研究[J].能源与环保,2017,39(3):99-102,107.Wang Wei,Liu Xiao,Fu Hongbo.Study on application of pressure grouting sealing technology in high gassy mine[J].China Energy and Environmental Protection,2017,39(3):99-102,107.
[12] 胡胜勇,刘红威.煤层瓦斯抽采钻孔漏气机理及应用研究进展[J].煤矿安全,2016,47(5):170-173.Hu Shengyong,Liu Hongwei.Leakage mechanism of coal seam gas drainage borehole and its application research progress[J].Safety in Coal Mines,2016,47(5):170-173.
[13] 靳随军.高瓦斯工作面自燃发火事故处理与教训[J].煤矿安全,2005,36(8):26-28.Jin Suijun.Spontaneous combustion accidents treatments and lessons in gassy faces[J].Safety in Coal Mines,2005,36(8):26-28.
[14] 罗伙根,李振兴.保德煤矿顺层瓦斯抽采钻孔封孔工艺研究[J].煤炭工程,2017,49(S2):88-90.Luo Huogen,Li Zhenxing.Study on sealing pore technique of gas drainage hole in-seam in Baode Mine[J].Coal Engineering,2017,49(S2):88-90.
[15] 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.