超大直径钻孔采空区瓦斯抽采技术研究
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摘要
为了降低U型通风采煤工作面上隅角瓦斯浓度,弥补高抽巷层位布置不合理造成的抽采量的不足,节省前期采用Y型通风进行沿空留巷的施工成本,提出了超大直径钻孔(550 mm)采空区瓦斯抽采技术。基于理论分析和现场分析试验,发现超大直径钻孔间距定为15 m或者20 m时抽采效果较为理想。现场应用实践表明:大直径钻孔抽采采空区瓦斯与普通采空区埋管抽采相比,抽采纯量提高了54.9%,抽采瓦斯体积分数提高了1.33倍。和沿空留巷"偏Y型通风"治理瓦斯相比,可使得回风流中的平均瓦斯体积分数降低12.7%,大幅节省了人员的投入。U型通风采煤工作面上隅角的瓦斯浓度得到有效控制,有效取代了上隅角埋管和沿空留巷,大幅提高了煤矿的生产效益。
This paper proposes a gas extraction technology-super large diameter borehole gob gas extraction technology. The technology is devoted to reduce gas concentration of working face upper corner in U-shaped ventilation,solve the problem of extraction deficiency caused by the unreasonable high-level drainage roadway layout,and reduce the construction cost of using Y-type ventilation gob side entry retaining in the early stage. Based on theoretical analysis and field tests,it is concluded that the extraction is most efficient when the spacing of boreholes is 15 m or 20 m.Field application shows that,compared to conventional gas extraction,the pure quantity of gob gas extraction in the large-diameter extraction increases by 54.9% and the extraction concentration increases by 1.33 times. The technology is also superior to Y-type ventilation gob side entry retaining,which is evidenced by 12.7% reduction of average gas concentration in return air flow,and reduction of labor requirement. Applying this gas extraction technology,gas concentration of upper corner of U-shaped ventilation can be effectively controlled and buried pipe on upper corner and gob side entry retaining can be removed,which greatly improves the mining productivity.
This paper proposes a gas extraction technology-super large diameter borehole gob gas extraction technology. The technology is devoted to reduce gas concentration of working face upper corner in U-shaped ventilation,solve the problem of extraction deficiency caused by the unreasonable high-level drainage roadway layout,and reduce the construction cost of using Y-type ventilation gob side entry retaining in the early stage. Based on theoretical analysis and field tests,it is concluded that the extraction is most efficient when the spacing of boreholes is 15 m or 20 m.Field application shows that,compared to conventional gas extraction,the pure quantity of gob gas extraction in the large-diameter extraction increases by 54.9% and the extraction concentration increases by 1.33 times. The technology is also superior to Y-type ventilation gob side entry retaining,which is evidenced by 12.7% reduction of average gas concentration in return air flow,and reduction of labor requirement. Applying this gas extraction technology,gas concentration of upper corner of U-shaped ventilation can be effectively controlled and buried pipe on upper corner and gob side entry retaining can be removed,which greatly improves the mining productivity.
引文
[1]王增全.高瓦斯工作面立体瓦斯抽采技术[J].煤炭科学技术,2013,10(5):86-89.WANG Zengquan.Gas cubic drainage technology of high gassy coal mining face[J]. Coal Science and Technology,2013,10(5):86-89.
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[5]吴兵,雷柏伟,华明国,等.回采工作面上隅角瓦斯拖管抽采技术参数研究[J].采矿与安全工程学报,2014,5(2):315-321.WU Bing,LEI Baiwei,HUA Mingguo,et al.Parameters of gas tube extraction technology in the upper corner of working face[J].Journal of Mining and Safety Engineering,2014,5(2):315-321.
[6]陈殿赋,鲁义.工作面上隅角瓦斯综合治理技术的研究及应用[J].煤炭科学技术,2013,10(9):57-59,63.CHEN Dianfu,LU Yi. Research and application on comprehensive gas treatment technology in upper corner of working face[J]. Coal Science and Technology,2013,10(9):57-59,63.
[7]程建圣.高瓦斯矿井近煤层群综采工作面上隅角瓦斯治理[J].矿业安全与环保,2011,38(11):54-56,59.CHENG Jiansheng.Fully mechanized coal mining face of near coal seam group in high gas mine of the gas control in upper corner[J].Mining Safety&Environmental Protection,2011,38(11):54-56,59.
[8]王克武,孙福玉,姜伟东.低瓦斯矿井工作面上隅角瓦斯超限治理技术[J].煤炭科学技术,2012,40(5):49-51,54.WANG Kewu,SUN Fuyu,JIANG Weidong. Gas over limit control technology of top corner in coal mining face of low gassy mine[J].Coal Science and Technology,2012,40(5):49-51,54.
[9]游继军,蒋承林,张超杰.兴隆煤矿15211工作面上隅角瓦斯治理技术研究[J].中国矿业,2013,11(2):104-106.YOU Jijun,JING Chenglin,ZHANG ChaoJie. Upper corner gas treatment technology research of 15211 working face in Xinglong coal mine[J].China Mining Magazine,2013,11(2):104-106.
[10]陈学习,金文广,毕瑞卿,等.气动风机配合涡流区置换治理上隅角瓦斯技术[J].辽宁工程技术大学学报:自然科学版,2014,9(12):1590-1593.CHEN Xuexi,JIN Wenguang,BI Ruiqing,et al. Technology of controlling upper corner gas by pneumatic fan with vortex zone replacement[J]. Journal of Liaoning Technical University:Natural Science,2014,9(12):1590-1593.
[11]徐景德,彭兴力,齐睿琛,等.低渗透率煤层采煤工作面上隅角瓦斯治理方法研究[J].华北科技学院学报,2015,10(6):14-19.XU Jingde,PENG Xingli,QI Ruichen,et al. Study on the upper corner gas control of working face in coal seam with low permeability[J].Journal of North China Institute of Science and Technology,2015,10(6):14-19.
[12]周爱桃,李志磊,杜锋,等.采空区埋管抽放治理上隅角瓦斯技术研究[J].煤炭技术,2015,5(2):114-116.ZHOU Aitao,LI Zhilei,DU Feng,et al. Research on gas prevent technology of upper corner by buried pipe drainage[J]. Coal Technology,2015,5(2):114-116.
[13]李国玉,李田华.大直径钻孔卸压技术防治巷道冲击危险的研究应用[J].中国煤炭,2016,8(12):76-80.LI Guoyu,LI Tianhua.Research and application on with large-diameter drillhole pressure relief technology for preventing roadway rock burst[J].China Coal,2016,8(12):76-80.
[14]贾传洋,蒋宇静,张学朋,等.大直径钻孔卸压机理室内及数值试验研究[J].岩土工程学报,2017,7(6):1115-1122.JIA Chuanyang,JIANG Yujing,ZHANG Xuepeng,et al.Laboratory and numerical experiments on pressure relief mechanism of large-diameter boreholes[J]. Chinese Journal of Geotechnical Engineering,2017,7(6):1115-1122.
[15]田莉梅,张英,张景华.深部开采高地应力区钻孔卸压数值模拟及应用[J].金属矿山,2017,8(4):31-35.TIAN Limei, ZHANG Ying, ZHANG Jinghua. Numerical simulation and application of boreholes destressing technology in high in-situ stress zone during deep mining[J]. Metal Mine,2017,8(4):31-35.
[2]魏宏超,杨慧琳,王洪涛,等.大直径顶板定向钻孔在亭南煤矿上隅角瓦斯治理中的应用[J].煤炭工程,2017,49(4):64-67.WEI Hongchao,YANG Huilin,WANG Hongtao,et al. Application of large diameter directional roof drilling in upper corner gas control[J].Coal Engineering,2017,49(4):64-67.
[3]王志亮,陈善文,上官昌培,等.孔庄矿7354工作面上隅角瓦斯治理模式研究[J].中国煤炭,2012,11(3):107-109.WANG Zhiliang,CHEN Shanwen,SHANGGUAN Changpei,et al.Research on gas control mode in upper corner at 7354 coal face of Kongzhuang Coal Mine[J].China Coal,2012,11(3):107-109.
[4]邢纪伟,邬剑明.低瓦斯矿井上隅角瓦斯超限原因分析及治理技术[J].煤炭技术,2016,8(1):188-190.XING Jiwei,WU Jianming.Management technology and cause analysis of upper corner gas overrun in low gas mine[J].Coal Technology,2016,8(1):188-190.
[5]吴兵,雷柏伟,华明国,等.回采工作面上隅角瓦斯拖管抽采技术参数研究[J].采矿与安全工程学报,2014,5(2):315-321.WU Bing,LEI Baiwei,HUA Mingguo,et al.Parameters of gas tube extraction technology in the upper corner of working face[J].Journal of Mining and Safety Engineering,2014,5(2):315-321.
[6]陈殿赋,鲁义.工作面上隅角瓦斯综合治理技术的研究及应用[J].煤炭科学技术,2013,10(9):57-59,63.CHEN Dianfu,LU Yi. Research and application on comprehensive gas treatment technology in upper corner of working face[J]. Coal Science and Technology,2013,10(9):57-59,63.
[7]程建圣.高瓦斯矿井近煤层群综采工作面上隅角瓦斯治理[J].矿业安全与环保,2011,38(11):54-56,59.CHENG Jiansheng.Fully mechanized coal mining face of near coal seam group in high gas mine of the gas control in upper corner[J].Mining Safety&Environmental Protection,2011,38(11):54-56,59.
[8]王克武,孙福玉,姜伟东.低瓦斯矿井工作面上隅角瓦斯超限治理技术[J].煤炭科学技术,2012,40(5):49-51,54.WANG Kewu,SUN Fuyu,JIANG Weidong. Gas over limit control technology of top corner in coal mining face of low gassy mine[J].Coal Science and Technology,2012,40(5):49-51,54.
[9]游继军,蒋承林,张超杰.兴隆煤矿15211工作面上隅角瓦斯治理技术研究[J].中国矿业,2013,11(2):104-106.YOU Jijun,JING Chenglin,ZHANG ChaoJie. Upper corner gas treatment technology research of 15211 working face in Xinglong coal mine[J].China Mining Magazine,2013,11(2):104-106.
[10]陈学习,金文广,毕瑞卿,等.气动风机配合涡流区置换治理上隅角瓦斯技术[J].辽宁工程技术大学学报:自然科学版,2014,9(12):1590-1593.CHEN Xuexi,JIN Wenguang,BI Ruiqing,et al. Technology of controlling upper corner gas by pneumatic fan with vortex zone replacement[J]. Journal of Liaoning Technical University:Natural Science,2014,9(12):1590-1593.
[11]徐景德,彭兴力,齐睿琛,等.低渗透率煤层采煤工作面上隅角瓦斯治理方法研究[J].华北科技学院学报,2015,10(6):14-19.XU Jingde,PENG Xingli,QI Ruichen,et al. Study on the upper corner gas control of working face in coal seam with low permeability[J].Journal of North China Institute of Science and Technology,2015,10(6):14-19.
[12]周爱桃,李志磊,杜锋,等.采空区埋管抽放治理上隅角瓦斯技术研究[J].煤炭技术,2015,5(2):114-116.ZHOU Aitao,LI Zhilei,DU Feng,et al. Research on gas prevent technology of upper corner by buried pipe drainage[J]. Coal Technology,2015,5(2):114-116.
[13]李国玉,李田华.大直径钻孔卸压技术防治巷道冲击危险的研究应用[J].中国煤炭,2016,8(12):76-80.LI Guoyu,LI Tianhua.Research and application on with large-diameter drillhole pressure relief technology for preventing roadway rock burst[J].China Coal,2016,8(12):76-80.
[14]贾传洋,蒋宇静,张学朋,等.大直径钻孔卸压机理室内及数值试验研究[J].岩土工程学报,2017,7(6):1115-1122.JIA Chuanyang,JIANG Yujing,ZHANG Xuepeng,et al.Laboratory and numerical experiments on pressure relief mechanism of large-diameter boreholes[J]. Chinese Journal of Geotechnical Engineering,2017,7(6):1115-1122.
[15]田莉梅,张英,张景华.深部开采高地应力区钻孔卸压数值模拟及应用[J].金属矿山,2017,8(4):31-35.TIAN Limei, ZHANG Ying, ZHANG Jinghua. Numerical simulation and application of boreholes destressing technology in high in-situ stress zone during deep mining[J]. Metal Mine,2017,8(4):31-35.
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