塔山煤矿综采工作面切顶留巷技术
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摘要
为解决塔山煤矿三采区采掘接替紧张的问题,采用切顶卸压沿空留巷无煤柱开采技术在该采区进行切顶留巷试验研究。首先,系统介绍了切顶留巷技术原理、工艺流程及切顶留巷关键技术;其次,结合该煤矿工程地质条件,采用理论分析计算、数值软件模拟和现场爆破试验等方法,得出顶板预裂切缝高度为7.5 m、切缝角度为15°、恒阻锚索长度为9 m等关键参数,单孔最优装药结构为4+3+3+2,孔间距500 mm。留巷稳定后,顶板最大下沉量为188 mm,底鼓最大值为100 mm,两帮收缩最大值为164 mm,监测结果表明切顶卸压条件下,留巷效果满足生产需求。
In order to solve the problem of mining and excavation alternation tension of Tashan Coal Mine,the technology of gob-side entry retaining by roof cutting and pressure releasing was carried out in the mining area. Firstly,the technical principle,technological process and key technology of gob-side entry retaining by roof cutting and pressure releasing are systematically introduced. Secondly,combined with the mine engineering geological conditions,using theoretical analysis calculation,numerical software simulation and field blasting test,it concluded that the pre-splitting kerf of the roof is 7.5 m,the angle of the kerf is 15°,the length of the constant-resistance cable is9 m,the optimal charging structure of single hole is 4+ 3+ 3+ 2 and the of hole spacing is 500 mm. After the roadway is stabilized,the maximum subsidence amount of the roof is 188 mm,the maximum of the floor heave is 100 mm and the maximum shrinkage of two sides is164 mm. The monitoring results show that the effect of gob-side entry retaining meets the production demand under the condition of roof cutting and pressure releasing.
In order to solve the problem of mining and excavation alternation tension of Tashan Coal Mine,the technology of gob-side entry retaining by roof cutting and pressure releasing was carried out in the mining area. Firstly,the technical principle,technological process and key technology of gob-side entry retaining by roof cutting and pressure releasing are systematically introduced. Secondly,combined with the mine engineering geological conditions,using theoretical analysis calculation,numerical software simulation and field blasting test,it concluded that the pre-splitting kerf of the roof is 7.5 m,the angle of the kerf is 15°,the length of the constant-resistance cable is9 m,the optimal charging structure of single hole is 4+ 3+ 3+ 2 and the of hole spacing is 500 mm. After the roadway is stabilized,the maximum subsidence amount of the roof is 188 mm,the maximum of the floor heave is 100 mm and the maximum shrinkage of two sides is164 mm. The monitoring results show that the effect of gob-side entry retaining meets the production demand under the condition of roof cutting and pressure releasing.
引文
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[5]康红普,牛多龙,张镇,等.深部沿空留巷围岩变形特征与支护技术[J].岩石力学与工程学报,2010,29(10):1977-1987.KANG Hongpu,NIU Duolong,ZHANG Zhen,et al. Deformation characteristics of surrounding rock and supporting technology of gob-side entry retaining in deep coal mine[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(10):1977-1987.
[6]谭云亮,于凤海,宁建国,等.沿空巷旁支护适应性原理与支护方法[J].煤炭学报,2016,41(2):376-382.TAN Yunliang,YU Fenghai,NING Jianguo,et al. Adaptability theory of roadside support in gob-side entry retaining and its supporting design[J]. Journal of China Coal Society,2016,41(2):376-382.
[7]张东升,马立强,冯光明.综放巷内充填原位沿空留巷技术[J].岩石力学与工程学报2005,24(4):1164-1168.ZHANG Dongsheng,MA Liqiang,FENG Guangming.The technique of gob-side entry retaining with entry-in packing on its original position in fully-mechanized coal face with top-coal caving[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(4):1164-1168.
[8]张农,陈红,陈瑶.千米深井高地压软岩巷道沿空留巷工程案例[J].煤炭学报,2015,40(3):494-501.ZHANG Nong,CHEN Hong,CHEN Yao. An engineering case of gob-side entry retaining in one kilometer-depth soft rock roadway with high ground pressure[J].Journal of China Coal Society,2015,40(3):494-501.
[9]漆泰岳,郭育光,侯朝炯.沿空留巷整体浇注护巷带适应性研究[J].煤炭学报,1999,24(3):256-260.QI Taiyue,GUO Yuguang,HOU Chaojiong. Study on the adaptability for the pack-fillings of the gob-side entry retaining[J].Journal of China Coal Society,1999,24(3):256-260.
[10]陈勇,柏建彪,王襄禹,等.沿空留巷巷内支护技术研究与应用[J].煤炭学报,2012,37(6):903-910.CHEN Yong,BAI Jianbiao,WANG Xiangyu,et al. Support technology research and application inside roadway of gob-side entry retaining[J].Journal of China Coal Society,2012,37(6):903-910.
[11]何满潮,宋振骐,王安,等.长壁开采切顶短壁梁理论及其110工法—第三次矿业科学技术变革[J].煤炭科技,2017(1):1-9.HE Manchao,SONG Zhenqi,WANG,An,et al.Theory of longwall mining by using roof cutting shortwall team and 110 method[J].Coal Science&Technology Magazine,2017(1):1-9.
[12]何满潮,高玉兵,杨军,等.厚煤层快速回采切顶卸压无煤柱自成巷工程试验[J].岩土力学,2018,39(1):254-264.HE Manchao,GAO Yubing,YANG Jun,et al.Engineering experimentation of gob-side entry retaining formed by roof cutting and pressure release in a thick-seam fast-extracted mining face[J].Rock and Soil Mechanics,2018,39(1):254-264.
[13]何满潮,王炯,孙晓明,等.负泊松比效应锚索的力学特性及其冲击地压防治中的应用研究[J],煤炭学报,2014,39(2):214-221.HE Manchao,WANG Jiong,SUN Xiaoming,et al.Mechanics characteristics and applications of prevention and control rock bursts of the negative poisson’s ratio effect anchor[J].Journal of China Coal Society,2014,39(2):214-221.
[14]马新根,何满潮,王炯,等.雁崖煤矿8304工作面沿空留巷条件下切眼后方硐室支护设计研究[J].煤炭科技,2017(12):30-33.MA Xingen,HE Manchao,WANG Jiong,et al.Study on design of chamber supporting behind cutting hole under condition of gobside entry retaining in 8304 Face of Yanya coal mine[J]. Coal Science&Technology Magazine,2017(12):30-33.
[15]孙晓明,刘鑫,梁广峰,等.薄煤层切顶卸压沿空留巷关键参数研究[J].岩石力学与工程学报,2014,33(7):1449-1456.SUN Xiaoming,LIU Xin,LIANG Guangfeng,et al.Key parameters of gob-side entry retaining formed by roof cut and pressure releasing in thin coal seams[J]. Chinese Journal of Rock Mechanics and Engineering,2014,33(7):1449-1456.
[16]郭志飚,王将,曹天培,等.薄煤层切顶卸压自动成巷关键参数研究[J].中国矿业大学学报,2016,45(9):879-885.GUO Zhibiao,WANG Jiang,CAO Tianpei,et al. Research on key parameters of gob-side entry retaining automatically formed by roof cutting and pressure release in thin coal seam mining[J].Journal of China University of Mining and Technology,2016,45(9):879-885.
[17]迟宝锁,周开放,何满潮,等.大采高工作面切顶留巷支护参数优化研究[J].煤炭科学技术,2017,45(8):128-133.CHI Baosuo,ZHOU Kaifang,HE Manchao. Optimization research on supporting parameters of roof cutting entry retaining with large mining height face[J]. Coal Science and Technology,2017,45(8):128-133.
[18]王建文,王世彬,杨军,等.切顶卸压沿空留巷顶板破坏机理及控制技术[J].煤炭科学技术,2017,45(8):80-84.WANG Jianwen,WANG Shibin,YANG Jun,et al. Roof failure mechanism of gob-side entry retaining by roof cutting andpressure releasing and its control technology[J]. Coal Science and Technology,2017,45(8):80-84.
[19]何东升,刘旦龙,张洋.复合顶板中厚煤层切顶卸压留巷无煤柱开采技术[J].煤炭科学技术,2018,46(9):126-132.HE Dongsheng,LIU Danlong,ZHANG Yang. Non-pillar mining technology of medium thick seam with roof cutting and pressure released retained gateway and complex roof[J].Coal Science and Technology,2018,46(9):126-132.
[20]朱珍,张科学,袁红平.切顶卸压沿空留巷碎石巷帮控制技术及应用[J].煤炭科学技术,2018,46(3):25-32.ZHU Zhen,ZHANG Kexue,YUAN Hongping. Control technology and its application of roadway side wall formed by gangue in gobside entry retaining formed by roof cutting and pressure releasing[J].Coal Science and Technology,2018,46(3):25-32.
[2]华心祝,赵少华,朱昊,等.沿空留巷综合支护技术研究[J].岩土力学,2016,27(12):2225-2228.HUA Xinzhu,ZHAO Shaohua,ZHU Hao,et al. Research on combined support technique of gob-side entry retaining[J]. Rock and Soil Mechanics,2016,27(12):2225-2228.
[3]布铁勇,冯光明,贾凯军,等.大采高综采沿空留巷巷旁充填支护技术[J].煤炭科学技术,2010,38(11):41-44.BU Tieyong,FENG Guangming,JIA Kaijun,et al. Gateway Side backfilling support technology of goaf side gateway in fully mechanized high cutting longwall mining face[J].Coal Science and Technology,2010,38(11):41-44.
[4]柏建彪,周华强,侯朝炯,等.沿空留巷巷旁支护技术的发展[J].中国矿业大学学报,2004,33(2):183-186.BAI Jianbiao,ZHOUHuaqiang,HOU Chaojiong,et al.Development of support technology beside roadway in gob-side entry retaining for next sublevel[J]. Journal of China University of Mining and Technology,2004,33(2):183-186.
[5]康红普,牛多龙,张镇,等.深部沿空留巷围岩变形特征与支护技术[J].岩石力学与工程学报,2010,29(10):1977-1987.KANG Hongpu,NIU Duolong,ZHANG Zhen,et al. Deformation characteristics of surrounding rock and supporting technology of gob-side entry retaining in deep coal mine[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(10):1977-1987.
[6]谭云亮,于凤海,宁建国,等.沿空巷旁支护适应性原理与支护方法[J].煤炭学报,2016,41(2):376-382.TAN Yunliang,YU Fenghai,NING Jianguo,et al. Adaptability theory of roadside support in gob-side entry retaining and its supporting design[J]. Journal of China Coal Society,2016,41(2):376-382.
[7]张东升,马立强,冯光明.综放巷内充填原位沿空留巷技术[J].岩石力学与工程学报2005,24(4):1164-1168.ZHANG Dongsheng,MA Liqiang,FENG Guangming.The technique of gob-side entry retaining with entry-in packing on its original position in fully-mechanized coal face with top-coal caving[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(4):1164-1168.
[8]张农,陈红,陈瑶.千米深井高地压软岩巷道沿空留巷工程案例[J].煤炭学报,2015,40(3):494-501.ZHANG Nong,CHEN Hong,CHEN Yao. An engineering case of gob-side entry retaining in one kilometer-depth soft rock roadway with high ground pressure[J].Journal of China Coal Society,2015,40(3):494-501.
[9]漆泰岳,郭育光,侯朝炯.沿空留巷整体浇注护巷带适应性研究[J].煤炭学报,1999,24(3):256-260.QI Taiyue,GUO Yuguang,HOU Chaojiong. Study on the adaptability for the pack-fillings of the gob-side entry retaining[J].Journal of China Coal Society,1999,24(3):256-260.
[10]陈勇,柏建彪,王襄禹,等.沿空留巷巷内支护技术研究与应用[J].煤炭学报,2012,37(6):903-910.CHEN Yong,BAI Jianbiao,WANG Xiangyu,et al. Support technology research and application inside roadway of gob-side entry retaining[J].Journal of China Coal Society,2012,37(6):903-910.
[11]何满潮,宋振骐,王安,等.长壁开采切顶短壁梁理论及其110工法—第三次矿业科学技术变革[J].煤炭科技,2017(1):1-9.HE Manchao,SONG Zhenqi,WANG,An,et al.Theory of longwall mining by using roof cutting shortwall team and 110 method[J].Coal Science&Technology Magazine,2017(1):1-9.
[12]何满潮,高玉兵,杨军,等.厚煤层快速回采切顶卸压无煤柱自成巷工程试验[J].岩土力学,2018,39(1):254-264.HE Manchao,GAO Yubing,YANG Jun,et al.Engineering experimentation of gob-side entry retaining formed by roof cutting and pressure release in a thick-seam fast-extracted mining face[J].Rock and Soil Mechanics,2018,39(1):254-264.
[13]何满潮,王炯,孙晓明,等.负泊松比效应锚索的力学特性及其冲击地压防治中的应用研究[J],煤炭学报,2014,39(2):214-221.HE Manchao,WANG Jiong,SUN Xiaoming,et al.Mechanics characteristics and applications of prevention and control rock bursts of the negative poisson’s ratio effect anchor[J].Journal of China Coal Society,2014,39(2):214-221.
[14]马新根,何满潮,王炯,等.雁崖煤矿8304工作面沿空留巷条件下切眼后方硐室支护设计研究[J].煤炭科技,2017(12):30-33.MA Xingen,HE Manchao,WANG Jiong,et al.Study on design of chamber supporting behind cutting hole under condition of gobside entry retaining in 8304 Face of Yanya coal mine[J]. Coal Science&Technology Magazine,2017(12):30-33.
[15]孙晓明,刘鑫,梁广峰,等.薄煤层切顶卸压沿空留巷关键参数研究[J].岩石力学与工程学报,2014,33(7):1449-1456.SUN Xiaoming,LIU Xin,LIANG Guangfeng,et al.Key parameters of gob-side entry retaining formed by roof cut and pressure releasing in thin coal seams[J]. Chinese Journal of Rock Mechanics and Engineering,2014,33(7):1449-1456.
[16]郭志飚,王将,曹天培,等.薄煤层切顶卸压自动成巷关键参数研究[J].中国矿业大学学报,2016,45(9):879-885.GUO Zhibiao,WANG Jiang,CAO Tianpei,et al. Research on key parameters of gob-side entry retaining automatically formed by roof cutting and pressure release in thin coal seam mining[J].Journal of China University of Mining and Technology,2016,45(9):879-885.
[17]迟宝锁,周开放,何满潮,等.大采高工作面切顶留巷支护参数优化研究[J].煤炭科学技术,2017,45(8):128-133.CHI Baosuo,ZHOU Kaifang,HE Manchao. Optimization research on supporting parameters of roof cutting entry retaining with large mining height face[J]. Coal Science and Technology,2017,45(8):128-133.
[18]王建文,王世彬,杨军,等.切顶卸压沿空留巷顶板破坏机理及控制技术[J].煤炭科学技术,2017,45(8):80-84.WANG Jianwen,WANG Shibin,YANG Jun,et al. Roof failure mechanism of gob-side entry retaining by roof cutting andpressure releasing and its control technology[J]. Coal Science and Technology,2017,45(8):80-84.
[19]何东升,刘旦龙,张洋.复合顶板中厚煤层切顶卸压留巷无煤柱开采技术[J].煤炭科学技术,2018,46(9):126-132.HE Dongsheng,LIU Danlong,ZHANG Yang. Non-pillar mining technology of medium thick seam with roof cutting and pressure released retained gateway and complex roof[J].Coal Science and Technology,2018,46(9):126-132.
[20]朱珍,张科学,袁红平.切顶卸压沿空留巷碎石巷帮控制技术及应用[J].煤炭科学技术,2018,46(3):25-32.ZHU Zhen,ZHANG Kexue,YUAN Hongping. Control technology and its application of roadway side wall formed by gangue in gobside entry retaining formed by roof cutting and pressure releasing[J].Coal Science and Technology,2018,46(3):25-32.