抽采钻孔水力修复及二次增透技术在郑煤集团的试验应用
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摘要
告成煤矿主采煤层赋存不稳定、透气性差,采取水力冲孔增透措施后,抽采过程中依然存在瓦斯流量衰减快、钻孔塌孔、堵孔的现象,瓦斯抽采效果较差。通过试验应用水力修复及二次增透技术,对抽采效果不好的钻孔进行透孔修复及二次对煤层进行增透,单孔瓦斯抽采浓度由5%提高到100%,单孔抽采量提高了200～500 m~3,钻孔有效抽采时间延长了15～30 d,取得了良好的抽采效果。
The occurrence of main mineable coal seam in Gaocheng Coal Mine is instable,and the permeability is poor.After adopting hydraulic punching anti-reflection measures,there are the phenomena of gas flow fast attenuation in the extraction process,borehole collapse plugging,the effect of gas drainage is poor.Through experimental application hydraulic remediation and secondary permeability improvement high technology,repair the borehole of poor drainage efficiency and anti-reflection the coal seam for the second time,the gas extraction concentration of single borehole increased from 5% to 100%,the gas extraction capacity of single borehole increased by 200～500 m~3,the effective extraction time of the borehole is extended for 15～30 days,good extraction results are obtained.
The occurrence of main mineable coal seam in Gaocheng Coal Mine is instable,and the permeability is poor.After adopting hydraulic punching anti-reflection measures,there are the phenomena of gas flow fast attenuation in the extraction process,borehole collapse plugging,the effect of gas drainage is poor.Through experimental application hydraulic remediation and secondary permeability improvement high technology,repair the borehole of poor drainage efficiency and anti-reflection the coal seam for the second time,the gas extraction concentration of single borehole increased from 5% to 100%,the gas extraction capacity of single borehole increased by 200～500 m~3,the effective extraction time of the borehole is extended for 15～30 days,good extraction results are obtained.
引文
[1] 常利铭.水力压裂技术在煤矿瓦斯治理方面的应用[J].矿业安全与环保,2015(2):109-111.Chang Liming.Application of hydraulic fracturing technology in coal mine gas control[J].Mining Safety & Environmental Protection,2015(2):109-111.
[2] 郭臣业,沈大富,张翠兰,等.煤矿井下控制水力压裂煤层增透关键技术及应用[J].煤炭科学技术,2015,43(2):114-118,122.Guo Chenye,Shen Dafu,Zhang Cuilan,et al.Key technology and application of controlling hydraulic fracturing coal seam permeability in coal mine[J].Coal Science and Technology,2015,43(2):114-118,122.
[3] 林柏泉,孟杰,宁俊,等.含瓦斯煤体水力压裂动态变化特征研究[J].采矿与安全工程学报,2012,29(1):106-110.Lin Boquan,Meng Jie,Ning Jun,et al.Study on dynamic characteristics of hydraulic fracturing of gas containing coal[J].Journal of Mining and Safety Engineering,2012,29(1):106-110.
[4] 李波,张路路,孙东辉,等.水力冲孔措施研究进展及存在问题分析[J].河南理工大学学报(自然科学版),2016,35(1):16-22.Li Bo,Zhang Lulu,Sun Donghui,et al.Research progress and existing problems of hydraulic punching measures[J].Journal of Henan Polytechnic University(Natural Science),2016,35(1):16-22.
[5] 蔺海晓,杨志龙,范毅伟.煤层钻孔周围应力场的分析与模拟[J].河南理工大学学报(自然科学版),2011,30(2):137-144.Lin Haixiao,Yang Zhilong,Fan Yiwei.Analysis and simulation of stress field around coal seam boreholes[J].Journal of Henan Polytechnic University(Natural Science),2011,30(2):137-144.
[6] 张金波,吴财芳.煤层气开采技术应用现状及其改进[J].煤炭科学技术,2012,40(8):88-91,96.Zhang Jinbo,Wu Caifang.Application status and improvement of coalbed methane mining technology[J].Coal Science and Technology,2012,40(8):88-91,96.
[7] 肖长河,王春光,白振峰,等.突出煤层水力冲孔卸压增透效果数值模拟研究[J].煤炭技术,2015,34(7):147-149.Xiao Changhe,Wang Chunguang,Bai Zhenfeng,et al.Numerical simulation study on pressure relief and permeability enhancement effect of hydraulic punching in outburst coal seam[J].Coal Technology,2015,34(7):147-149.
[8] 程庆迎.低透煤层水力致裂增透与驱赶瓦斯效应研究[D].徐州:中国矿业大学,2012.
[9] 梁运培.高压水射流钻孔破煤机理研究[D].济南:山东科技大学,2007.
[10] 郑春山.穿层钻孔煤或瓦斯喷出机理及防治关键技术研究[D].徐州:中国矿业大学,2014.
[11] 彭伟.低透气性煤层水力冲孔卸压抽采瓦斯试验研究[D].淮南:安徽理工大学,2012.
[12] 任培良.水力冲孔卸压增透技术的研究与应用[D].焦作:河南理工大学,2009.
[13] 张子敏.中国煤层瓦斯分布特征[M].北京:煤炭工业出版社,1998.
[14] 张子敏.瓦斯地质学[M].徐州:中国矿业大学出版社,2008.
[15] 于不凡.煤矿瓦斯灾害防治及利用技术手册[M].北京:煤炭工业出版社,2005.
[16] 冯增朝.低渗透煤层瓦斯抽采理论及应用[M].北京:科学出版社,2008.
[17] W.C.Zhu,J.Liu,J.C.Sheng,et al.Analysis of coupled gas flow and deformation process with desorption and klinkenberg effects in coal seams[J].International Journal of Rock Mechanics and Mining Sciences,2007(7):45-48.
[18] D.A.Barry,D.A.Lockington,D.S.Jeng,et al.Analytical approximations for flow in compressible,saturated,one-dimensional porous media[J].Advances in Water Resources,2006(4):121-123.
[19] E.Chekhonin,K.Levonyan.Hydraulic fracture propagation in highly permeable formations,with applications to tip screenout[J].International Journal of Rock Mechanics and Mining Sciences,2011:132-136.
[20] Bingxiang Huang,Changyou Liu,Junhui Fu,et al.Hydraulic fracturing after water pressure control blasting for increased fracturing[J].International Journal of Rock Mechanics and Mining Sciences,2011(6):145-148.
[2] 郭臣业,沈大富,张翠兰,等.煤矿井下控制水力压裂煤层增透关键技术及应用[J].煤炭科学技术,2015,43(2):114-118,122.Guo Chenye,Shen Dafu,Zhang Cuilan,et al.Key technology and application of controlling hydraulic fracturing coal seam permeability in coal mine[J].Coal Science and Technology,2015,43(2):114-118,122.
[3] 林柏泉,孟杰,宁俊,等.含瓦斯煤体水力压裂动态变化特征研究[J].采矿与安全工程学报,2012,29(1):106-110.Lin Boquan,Meng Jie,Ning Jun,et al.Study on dynamic characteristics of hydraulic fracturing of gas containing coal[J].Journal of Mining and Safety Engineering,2012,29(1):106-110.
[4] 李波,张路路,孙东辉,等.水力冲孔措施研究进展及存在问题分析[J].河南理工大学学报(自然科学版),2016,35(1):16-22.Li Bo,Zhang Lulu,Sun Donghui,et al.Research progress and existing problems of hydraulic punching measures[J].Journal of Henan Polytechnic University(Natural Science),2016,35(1):16-22.
[5] 蔺海晓,杨志龙,范毅伟.煤层钻孔周围应力场的分析与模拟[J].河南理工大学学报(自然科学版),2011,30(2):137-144.Lin Haixiao,Yang Zhilong,Fan Yiwei.Analysis and simulation of stress field around coal seam boreholes[J].Journal of Henan Polytechnic University(Natural Science),2011,30(2):137-144.
[6] 张金波,吴财芳.煤层气开采技术应用现状及其改进[J].煤炭科学技术,2012,40(8):88-91,96.Zhang Jinbo,Wu Caifang.Application status and improvement of coalbed methane mining technology[J].Coal Science and Technology,2012,40(8):88-91,96.
[7] 肖长河,王春光,白振峰,等.突出煤层水力冲孔卸压增透效果数值模拟研究[J].煤炭技术,2015,34(7):147-149.Xiao Changhe,Wang Chunguang,Bai Zhenfeng,et al.Numerical simulation study on pressure relief and permeability enhancement effect of hydraulic punching in outburst coal seam[J].Coal Technology,2015,34(7):147-149.
[8] 程庆迎.低透煤层水力致裂增透与驱赶瓦斯效应研究[D].徐州:中国矿业大学,2012.
[9] 梁运培.高压水射流钻孔破煤机理研究[D].济南:山东科技大学,2007.
[10] 郑春山.穿层钻孔煤或瓦斯喷出机理及防治关键技术研究[D].徐州:中国矿业大学,2014.
[11] 彭伟.低透气性煤层水力冲孔卸压抽采瓦斯试验研究[D].淮南:安徽理工大学,2012.
[12] 任培良.水力冲孔卸压增透技术的研究与应用[D].焦作:河南理工大学,2009.
[13] 张子敏.中国煤层瓦斯分布特征[M].北京:煤炭工业出版社,1998.
[14] 张子敏.瓦斯地质学[M].徐州:中国矿业大学出版社,2008.
[15] 于不凡.煤矿瓦斯灾害防治及利用技术手册[M].北京:煤炭工业出版社,2005.
[16] 冯增朝.低渗透煤层瓦斯抽采理论及应用[M].北京:科学出版社,2008.
[17] W.C.Zhu,J.Liu,J.C.Sheng,et al.Analysis of coupled gas flow and deformation process with desorption and klinkenberg effects in coal seams[J].International Journal of Rock Mechanics and Mining Sciences,2007(7):45-48.
[18] D.A.Barry,D.A.Lockington,D.S.Jeng,et al.Analytical approximations for flow in compressible,saturated,one-dimensional porous media[J].Advances in Water Resources,2006(4):121-123.
[19] E.Chekhonin,K.Levonyan.Hydraulic fracture propagation in highly permeable formations,with applications to tip screenout[J].International Journal of Rock Mechanics and Mining Sciences,2011:132-136.
[20] Bingxiang Huang,Changyou Liu,Junhui Fu,et al.Hydraulic fracturing after water pressure control blasting for increased fracturing[J].International Journal of Rock Mechanics and Mining Sciences,2011(6):145-148.