深部高瓦斯矿井大采高工作面立体抽采瓦斯技术
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摘要
为了有效提高瓦斯抽采效率,以黄陵二号煤矿瓦斯(油层气)抽采为研究对象,采用现场调查、数值计算和现场监测等方法,综合分析深部高瓦斯矿井瓦斯(油层气)涌入路径,实施了综合立体抽采技术。工作面存有的4个砂岩储气层,均受采动影响,其分别处于上覆岩层的弯曲下沉带、垮落带和裂隙带之间,以及底部扰动范围,为采空区和工作面涌出瓦斯源。依据上覆岩层结构和采动影响程度,将抽采区分为采空区、采动区、未采煤层区,建立动态综合立体抽采技术。研究结果表明:工作面综合抽采技术实现了空间全覆盖的瓦斯抽采,各位置抽采量增加、瓦斯浓度降低。围岩及采空区瓦斯体积分数降低了40%、68%、41%。综合抽采技术提高了矿井的瓦斯抽采率,为矿井开采瓦斯治理提供了有力支撑。
In order to effectively improve the gas drainage efficiency,taking the gas( oil bed gas) drainage in Huangling Mine as a target,a site investigation,numerical calculation and site monitoring as well as other methods were applied to comprehensively analyze the gas inflow path of a deep high gassy mine. A comprehensive 3 D gas drainage technology was implemented. The study showed that four sandstone gas reservoirs in the coal mining face were all affected by the mining and were individually within the subsidence zone,collapsed zone and cracking zone as well as bottom disturbance scope. Those reservoirs would provide the gas disaster sources to the goaf and coal mining face. According to the rock strata structure and mining influences,the whole gas drainage could be divided into a goaf,mining zone and non mined seam. A dynamic comprehensive 3 D gas drainage technology was established. A site survey was conducted on the gas-oil strata content at each location. The evaluation results showed that the comprehensive gas drainage technology of the coal mining face could realize a space fully covered gas drainage. The gas drainage volume of each location could be increased and the gas concentration would be decreased. The gas volume fraction in the surrounding rock and the goaf was reduced by 40%,68% and 41%.The comprehensive gas drainage technology could improve the mine gas drainage rate and could provide a powerful support to the mine gas control.
In order to effectively improve the gas drainage efficiency,taking the gas( oil bed gas) drainage in Huangling Mine as a target,a site investigation,numerical calculation and site monitoring as well as other methods were applied to comprehensively analyze the gas inflow path of a deep high gassy mine. A comprehensive 3 D gas drainage technology was implemented. The study showed that four sandstone gas reservoirs in the coal mining face were all affected by the mining and were individually within the subsidence zone,collapsed zone and cracking zone as well as bottom disturbance scope. Those reservoirs would provide the gas disaster sources to the goaf and coal mining face. According to the rock strata structure and mining influences,the whole gas drainage could be divided into a goaf,mining zone and non mined seam. A dynamic comprehensive 3 D gas drainage technology was established. A site survey was conducted on the gas-oil strata content at each location. The evaluation results showed that the comprehensive gas drainage technology of the coal mining face could realize a space fully covered gas drainage. The gas drainage volume of each location could be increased and the gas concentration would be decreased. The gas volume fraction in the surrounding rock and the goaf was reduced by 40%,68% and 41%.The comprehensive gas drainage technology could improve the mine gas drainage rate and could provide a powerful support to the mine gas control.
引文
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[8]付江伟,傅雪海,刘琦,等.低渗高突煤层体系化瓦斯治理关键技术研究[J].中国安全科学学报,2018,28(7):109-115.FU Jiangwei,FU Xuehai,LIU Qi,et al. Research on key technologies for systematic control of gas incoal seam having low permeability and high outburst risk[J]. Chinese Journal of Safety Science,2018,28(7):109-115.
[9]姚宁平,张杰,张国亮,等.晋城矿区井下梳状钻孔瓦斯抽采技术体系[J].煤炭科学技术,2015,43(2):88-95.YAO Ningping,ZHANG Jie,ZHANG Guoliang,et al. System of gas drainage technology of comb-like directional drilling in Jincheng Mining Area[J].Coal Science and Technology,2015,43(2):88-95.
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[11]王春光.瓦斯智能抽采发展探讨[J].煤矿安全,2015,46(12):179-183.WANG Chunguang. Discussion on development of gas intelligent extraction[J]. Safety in Coal Mines,2015,46(12):179-183.
[12]林海飞,李树刚,赵鹏翔,等.我国煤矿覆岩采动裂隙带卸压瓦斯抽采技术研究进展[J].煤炭科学技术,2018,46(1):28-35.LIN Haifei,LI Shugang,ZHAO Pengxiang,et al. Research progress on pressure released gas drainage technology of mining cracking zone in overburden strata of coal mine in China[J].Coal Science and Technology,2018,46(1):28-35.
[13]刘军,李生舟,姚明柱.远距离下保护层底板穿层钻孔卸压瓦斯抽采研究[J].煤矿安全,2017,48(12):127-134.LIU Jun,LI Shengzhou,YAO Mingzhu. Study on gas drainage by pressure relief for floor through beds holes in far distance lower protective coal seam[J]. Safety in Coal Mines,2017,48(12):127-134.
[14]申健,李雪冰.瓦斯抽采达标评价AHP-FCE模型及应用[J].辽宁工程技术大学学报,2015,34(5):578-583.SHEN Jian,LI Xuebing. AHP-FCE model and application of gas drainage up to standard evaluation[J]. Journal of Liaoning Technical University,2015,34(5):578-583.
[15]唐恩贤,党利鹏,闫国锋.基于时空属性的黄陵矿区瓦斯精准化预抽实践[J].煤炭科学技术.2018,46(8):87-92.TANG Enxian,DANG Lipeng,YAN Guofeng. Practices on precision gas pre-drainage based on time-space attribute in Huangling Mining Area[J]. Coal Science and Technology,2018,46(8):87-92.
[16]汪有刚.高瓦斯矿井综放工作面瓦斯综合治理技术研究[J].煤炭工程,2018,50(10):106-108.WANG Yougang.Comprehensive gas control technology of fullymechanized top-coal caving face in high gas mine[J].Coal Engineering,2018,50(10):106-108.
[17]尹永明,姜福兴,谢广祥,等.基于微震和应力动态监测的煤岩破坏与瓦斯涌出关系研究[J].采矿与安全工程学报,2015,32(2):325-330.YIN Yongming,JIANG Fuxing,XIE Guangxiang,et al. Relation between coal-rock failure and methane emission based on microseismic and dynamic stress monitoring[J]. Journal of Mining&Safety Engineering,2015,32(2):325-330.
[2]谢和平,王金华,申宝宏,等.煤炭开采新理念—科学开采与科学产能[J].煤炭学报,2012,37(7):1069-1080.XIE Heping,WANG Jinhua,SHEN Baohong,et al.New idea of coal mining scientific mining and sustainable mining capacity[J].Journal of China Coal Society,2012,37(7):1069-1080.
[3]聂百胜,卢红奇,李祥春,等.煤体吸附-解吸瓦斯变形特征实验研究[J].煤炭学报,2015,40(4):754-760.NIE Baisheng,LU Hongqi,LI Xiangchun,et al.Experimental study on the characteristic of coal deformation during gas adsorption and desorption[J].Journal of China Coal Society,2015,40(4):754-760.
[4]杨天鸿,徐涛,刘建新,等.应力-损伤-渗流耦合模型及在深部煤层瓦斯卸压实践中的应用[J].岩石力学与工程学报,2005,24(16):2900-2905.YANG Tianhong,XU Tao,LIU Jianxin,et al. Coupling model of stress-damage-flow and its application to the investigation of instantaneous seepage mechanism for gas during unloading in coal seam with depth[J]. Chinese Journal of Rock Mechanics and Engineering,2005,24(16):2900-2905.
[5]俞启香,王凯,杨胜强.中国采煤工作面瓦斯涌出规律及其控制研究[J].中国矿业大学学报,2000,29(1):9-14.YU Qixiang,WANG Kai,YANG Shengqiang.Study on pattern and control of gas emission at coal face in China[J]. Journal of China University of Mining&Technology,2000,29(1):9-14.
[6]郝富昌,刘明举,孙丽娟.基于多物理场耦合的瓦斯抽放半径确定方法[J].煤炭学报,2018,38(S1):106-111.HAO Fuchang,LIU Mingju,SUN Lijuan. Determination method of gas drainage radius based on multi-physics coupling[J].Journal of China Coal Society,2018,38(S1):106-111.
[7]褚廷湘,余明高,姜德义,等.“U+I”型采煤工作面采空区瓦斯抽采量理论研究[J].中国矿业大学学报,2015,44(6):1008-1016.CHU Tingxiang,YU Minggao,JIANG Deyi,et al. Theory of gas extraction amount in The gob of“U+I”type panel[J].Journal of China University of Mining&Technology,2015,44(6):1008-1016.
[8]付江伟,傅雪海,刘琦,等.低渗高突煤层体系化瓦斯治理关键技术研究[J].中国安全科学学报,2018,28(7):109-115.FU Jiangwei,FU Xuehai,LIU Qi,et al. Research on key technologies for systematic control of gas incoal seam having low permeability and high outburst risk[J]. Chinese Journal of Safety Science,2018,28(7):109-115.
[9]姚宁平,张杰,张国亮,等.晋城矿区井下梳状钻孔瓦斯抽采技术体系[J].煤炭科学技术,2015,43(2):88-95.YAO Ningping,ZHANG Jie,ZHANG Guoliang,et al. System of gas drainage technology of comb-like directional drilling in Jincheng Mining Area[J].Coal Science and Technology,2015,43(2):88-95.
[10]韩真理.煤矿瓦斯抽采达标与抽采管理技术途径探讨[J].煤矿安全,2013,44(5):147-150.HAN Zhenli. Discussion on technique approaches of gas drainage reaching the standard and gas drainage management in coal mine[J]. Safety in Coal Mines,2013,44(5):147-150.
[11]王春光.瓦斯智能抽采发展探讨[J].煤矿安全,2015,46(12):179-183.WANG Chunguang. Discussion on development of gas intelligent extraction[J]. Safety in Coal Mines,2015,46(12):179-183.
[12]林海飞,李树刚,赵鹏翔,等.我国煤矿覆岩采动裂隙带卸压瓦斯抽采技术研究进展[J].煤炭科学技术,2018,46(1):28-35.LIN Haifei,LI Shugang,ZHAO Pengxiang,et al. Research progress on pressure released gas drainage technology of mining cracking zone in overburden strata of coal mine in China[J].Coal Science and Technology,2018,46(1):28-35.
[13]刘军,李生舟,姚明柱.远距离下保护层底板穿层钻孔卸压瓦斯抽采研究[J].煤矿安全,2017,48(12):127-134.LIU Jun,LI Shengzhou,YAO Mingzhu. Study on gas drainage by pressure relief for floor through beds holes in far distance lower protective coal seam[J]. Safety in Coal Mines,2017,48(12):127-134.
[14]申健,李雪冰.瓦斯抽采达标评价AHP-FCE模型及应用[J].辽宁工程技术大学学报,2015,34(5):578-583.SHEN Jian,LI Xuebing. AHP-FCE model and application of gas drainage up to standard evaluation[J]. Journal of Liaoning Technical University,2015,34(5):578-583.
[15]唐恩贤,党利鹏,闫国锋.基于时空属性的黄陵矿区瓦斯精准化预抽实践[J].煤炭科学技术.2018,46(8):87-92.TANG Enxian,DANG Lipeng,YAN Guofeng. Practices on precision gas pre-drainage based on time-space attribute in Huangling Mining Area[J]. Coal Science and Technology,2018,46(8):87-92.
[16]汪有刚.高瓦斯矿井综放工作面瓦斯综合治理技术研究[J].煤炭工程,2018,50(10):106-108.WANG Yougang.Comprehensive gas control technology of fullymechanized top-coal caving face in high gas mine[J].Coal Engineering,2018,50(10):106-108.
[17]尹永明,姜福兴,谢广祥,等.基于微震和应力动态监测的煤岩破坏与瓦斯涌出关系研究[J].采矿与安全工程学报,2015,32(2):325-330.YIN Yongming,JIANG Fuxing,XIE Guangxiang,et al. Relation between coal-rock failure and methane emission based on microseismic and dynamic stress monitoring[J]. Journal of Mining&Safety Engineering,2015,32(2):325-330.
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