被保护层工作面瓦斯来源分析及治理技术
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摘要
为研究被保护层高瓦斯工作面瓦斯来源,综合运用分源预测、统计、碳同位素分析等方法,首次发现了被保护层工作面上覆围岩一次破坏形成的裂隙中残存有大量游离瓦斯。在朱集东煤矿被保护层1111(3)工作面进行工程实践,优化了"顶板走向钻孔+边孔"系统布置,改进了护孔套管连接方式,"管到底"率达到95%,单孔瓦斯抽采量增加3. 5倍左右,工作面瓦斯抽采率达到88%,回风瓦斯浓度控制在0. 36%以下,平均0. 12%,平均日产量8 300 t,实现了安全高产高效。
In order to study source of gas in high gas workface of protected coal seam,through comprehensive application of different sources prediction method,statistical method and carbon isotope analysis method,a large amount of free gas in fracture formed by a destruction of overlying surrounding rock in the working face of protected layer was first discovered. In the practice of gas control engineering of 1111(3) protected working face in Zhujidong Coal Mine,system arrangement of " roof strike hole and side hole" was optimized,and the connection way of hole casing pipe was improved. By using the above technology,the " pipe to bottom" rate was 95% and single hole gas extraction increased by about 3. 5 times,and the gas drainage rate was 88% and the concentration of return air gas was below0. 36%,and the average of which was 0. 12%,and daily output can reach 8 300 t,and gaining safety,high yield and high efficiency.
In order to study source of gas in high gas workface of protected coal seam,through comprehensive application of different sources prediction method,statistical method and carbon isotope analysis method,a large amount of free gas in fracture formed by a destruction of overlying surrounding rock in the working face of protected layer was first discovered. In the practice of gas control engineering of 1111(3) protected working face in Zhujidong Coal Mine,system arrangement of " roof strike hole and side hole" was optimized,and the connection way of hole casing pipe was improved. By using the above technology,the " pipe to bottom" rate was 95% and single hole gas extraction increased by about 3. 5 times,and the gas drainage rate was 88% and the concentration of return air gas was below0. 36%,and the average of which was 0. 12%,and daily output can reach 8 300 t,and gaining safety,high yield and high efficiency.
引文
[1]李思乾.深井远距离上保护层开采卸压效果研究[J].煤矿安全,2018,49(10):179-182.Li Siqian. Study on relief effect of upper protective coal seam mining at long distance in deep mine[J]. Safety in Coal Mines,2018,49(10):179-182.
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[10]梁运培,于不凡.顶板岩层水平长钻孔合理布孔层位的研究[J].矿业安全与环保,2000,27(6):3-5.Liang Yunpei,Yu Bufan. Research on rationally arranging position of horizontal boreholes in roof rock stratum[J]. Mining Safety&Environmental Protection,2000,27(6):3-5.
[11]袁亮.煤与瓦斯共采[M].徐州:中国矿业大学出版社,2016.
[12]袁亮.低透气煤层群首采关键层卸压开采采空侧瓦斯分布特征与抽采技术[J].煤炭学报,2008,33(12):1362-1367.Yuan Liang. Gas distribution of the mined-out side and extraction technology of first mined key seam relief-mining in gassy multiseams of low permeability[J]. Journal of China Coal Society,2008,33(12):1362-1367.
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[14]刘林,马怀加.“钻到位、管到底、孔封严、水放通”实现瓦斯抽采最大化[C]//安徽省煤炭学会通风安全专业委员会六届三次学术交流会,2012.
[15]刘景顺,滕振兴.煤矿瓦斯抽放钻孔轨迹控制的理论探讨[J].煤矿安全,1995,26(7):27-31.Liu Jingshun,Teng Zhenxing. Theoretical discussion on trajectory control of gas drainage borehole in coal mine[J]. Safety in Coal Mines,1995,26(7):27-31.
[16]王克君,姜小冰,王新艳.煤矿瓦斯抽放钻孔曲线轨迹的测试分析[J].中国新技术新产品,2008,16(14):95.Wang Kejun,Jiang Xiaobing,Wang Xinyan. Coal mine gas drainage test and analysis of borehole trajectory curve[J]. New Technology&New Products of China,2008,16(14):95.
[17]刘喜龙,张军,赵明校,等.钻孔轨迹测量技术及应用研究[J].西部探矿工程,2016,28(11):17-20.Liu Xilong,Zhang Jun,Zhao Mingxiao,et al. Borehole trajectory measurement technology and application research[J]. West-China Exploration Engineering,2016,28(11):17-20.
[18]邓明明.全孔深大孔径插接花管瓦斯抽采技术[J].煤矿安全,2018,49(10):69-71.Deng Mingming. Gas drainage technology of full-hole depth and large diameter socket pipe[J]. Safety in Coal Mines,2018,49(10):69-71.
[2]梁冰,石占山,姜福利,等.远距离薄煤上保护层开采方案保护有效性论证[J].中国安全科学学报,2015,25(4):17-22.Liang Bing,Shi Zhanshan,Jiang Fuli,et al. Research on protection result of extra-thin protective coal seam mining[J]. China Safety Science Journal,2015,25(4):17-22.
[3]袁亮.松软低透煤层群瓦斯抽采理论与技术[M].北京:煤炭工业出版社,2004.
[4]袁亮,薛俊华.低透气性煤层群无煤柱煤与瓦斯共采关键技术[J].煤炭科学技术,2013,41(1):5-11.Yuan Liang,Xue Junhua. Key technology of pillarless coal and gas simultaneous mining in low permeability seam group[J]. Coal Science and Technology,2013,41(1):5-11.
[5]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.
[6]袁亮.煤矿总工程师技术手册[M].北京:煤炭工业出版社,2010.
[7]袁亮,刘泽功,章立清,等.开采煤层顶板瓦斯抽放的方法:CN03113021. 6[P].淮南矿业(集团)有限责任公司,2007.
[8]张士环,方良才,朱贵旺.高瓦斯回采面顶板走向钻孔抽采技术的实践[J].矿业安全与环保,2000,27(3):11-12.Zhang Shihuan,Fang Liangcai,Zhu Guiwang. Practice of gas drainage from boreholes along roof strike in high gassy faces[J]. Mining Safety&Environmental Protection,2000,27(3):11-12.
[9]刘泽功.开采煤层顶板抽采瓦斯流场分析[J].矿业安全与环保,2000,27(3):4-6.Liu Zegong. Analysis of flow field of gas drained from roof of working seams[J]. Mining Safety&Environmental Protection,2000,27(3):4-6.
[10]梁运培,于不凡.顶板岩层水平长钻孔合理布孔层位的研究[J].矿业安全与环保,2000,27(6):3-5.Liang Yunpei,Yu Bufan. Research on rationally arranging position of horizontal boreholes in roof rock stratum[J]. Mining Safety&Environmental Protection,2000,27(6):3-5.
[11]袁亮.煤与瓦斯共采[M].徐州:中国矿业大学出版社,2016.
[12]袁亮.低透气煤层群首采关键层卸压开采采空侧瓦斯分布特征与抽采技术[J].煤炭学报,2008,33(12):1362-1367.Yuan Liang. Gas distribution of the mined-out side and extraction technology of first mined key seam relief-mining in gassy multiseams of low permeability[J]. Journal of China Coal Society,2008,33(12):1362-1367.
[13]张再镕.钻孔施工与瓦斯抽采精细化管理模式的探讨与实践[J].内蒙古煤炭经济,2016(3):43-44.Zhang Zairong. Drilling construction and gas extraction refinement of study and practice of management model[J]. Inner Mongolia Coal Economy,2016(3):43-44.
[14]刘林,马怀加.“钻到位、管到底、孔封严、水放通”实现瓦斯抽采最大化[C]//安徽省煤炭学会通风安全专业委员会六届三次学术交流会,2012.
[15]刘景顺,滕振兴.煤矿瓦斯抽放钻孔轨迹控制的理论探讨[J].煤矿安全,1995,26(7):27-31.Liu Jingshun,Teng Zhenxing. Theoretical discussion on trajectory control of gas drainage borehole in coal mine[J]. Safety in Coal Mines,1995,26(7):27-31.
[16]王克君,姜小冰,王新艳.煤矿瓦斯抽放钻孔曲线轨迹的测试分析[J].中国新技术新产品,2008,16(14):95.Wang Kejun,Jiang Xiaobing,Wang Xinyan. Coal mine gas drainage test and analysis of borehole trajectory curve[J]. New Technology&New Products of China,2008,16(14):95.
[17]刘喜龙,张军,赵明校,等.钻孔轨迹测量技术及应用研究[J].西部探矿工程,2016,28(11):17-20.Liu Xilong,Zhang Jun,Zhao Mingxiao,et al. Borehole trajectory measurement technology and application research[J]. West-China Exploration Engineering,2016,28(11):17-20.
[18]邓明明.全孔深大孔径插接花管瓦斯抽采技术[J].煤矿安全,2018,49(10):69-71.Deng Mingming. Gas drainage technology of full-hole depth and large diameter socket pipe[J]. Safety in Coal Mines,2018,49(10):69-71.
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