急倾斜煤层铣采机机械化采煤方法
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摘要
针对倾角大于70°、煤层厚度3～5 m的急倾斜煤层难以实现机械化开采的难题,通过应用铣采机,配合柔性掩护支架,提出了走向长壁伪俯斜柔性掩护支架后退式铣采机械化采煤法。在弘利煤矿80°急倾斜煤层布置沿走向推进的伪俯斜长壁工作面,上巷回风,下巷运输;履带式铣采机由截割部、推运部等7个大部件组成,可以对急倾斜煤层机械铣挖;在工作面铺设搪瓷溜槽,铣挖破碎的煤体在重力作用下从搪瓷溜槽向下运输;设计的柔性支架成组布置在伪俯斜工作面,随着煤体的采出逐渐向下移动,形成稳定的回采空间。这种新型急倾斜煤层机械化开采方法的提出与应用,实现了该类煤层条件下落煤方式的机械化,有效提高了工作面效率。
It is difficult to realize mechanized mining for steeply inclined coal seams with dip angle greater than 70° and seam thickness of3 ～ 5 m.Through the use of flexible shield supports and the rotary drum cutter,the pseudo inclined mechanized retreating-longwall mining method with flexible shield support and milling excavation technology( RLFM) is proposed.In the steeply inclined coal seam with an dip angle of 80° in the Hongli Coal Mine,a pseudo inclined longwall working face was arranged.The upper roadway was used as return air and the lower roadway was served as transportation.The rotary drum cutter was composed of seven parts,such as the cutting unit,the pushing unit,the frame unit,et al,which realized the mechanical milling in steeply inclined seam.Enamel chutes were laid on the working face and the broken coal transported downwards from the enamel chute under gravity.The flexible supports were arranged in groups in a pseudo inclined working face and gradually moved downward with the coal mining to form a stable recovery space.The proposed and applied mechanized mining method for steeply inclined coal seams has truly realized the mechanization of mining under such seam conditions.
It is difficult to realize mechanized mining for steeply inclined coal seams with dip angle greater than 70° and seam thickness of3 ～ 5 m.Through the use of flexible shield supports and the rotary drum cutter,the pseudo inclined mechanized retreating-longwall mining method with flexible shield support and milling excavation technology( RLFM) is proposed.In the steeply inclined coal seam with an dip angle of 80° in the Hongli Coal Mine,a pseudo inclined longwall working face was arranged.The upper roadway was used as return air and the lower roadway was served as transportation.The rotary drum cutter was composed of seven parts,such as the cutting unit,the pushing unit,the frame unit,et al,which realized the mechanical milling in steeply inclined seam.Enamel chutes were laid on the working face and the broken coal transported downwards from the enamel chute under gravity.The flexible supports were arranged in groups in a pseudo inclined working face and gradually moved downward with the coal mining to form a stable recovery space.The proposed and applied mechanized mining method for steeply inclined coal seams has truly realized the mechanization of mining under such seam conditions.
引文
[1]姚琦,冯涛,廖泽.急倾斜走向分段充填倾向覆岩破坏特性及移动规律[J].煤炭学报,2017,42(12):3096-3105.YAO Qi,FENG Tao,LIAO Ze.Damage characteristics and movement of inclined strata with sublevel filling along the strike in the steepseam[J].Journal of China Coal Society,2017,42(12):3096-3105.
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[9] BROWN E T. Strength of models of rock with intermittent joints[J].Journal of Soil Mechanics&Foundations Division,1970,96(6):1935-1949.
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[12]李俊斌.急(倾)斜煤层柔性掩护支架采煤法[M].徐州:中国矿业大学出版社,2011:7-8.
[13]费巨云,郑超.急倾斜特厚煤层水平分段冲击矿压防治技术研究[J].煤炭工程,2018,50(4):66-69,74.FEI Juyun,ZHENG Chao. Study on rock-burst prevention with horizontal section top coalcaving in steep-inclined and thick coal seam[J].Coal Engineering,2018,50(4):66-69,74.
[14]刘小军.急倾斜厚煤层水平分段综放开采合理段高研究[D].西安:西安科技大学,2014:4-10.
[15]邵小平,张红祥,石平五.急斜煤层分段放顶煤开采合理段高选择研究[J].中国矿业大学学报,2009,38(4):544-548.SHAO Xiaoping,ZHANG Hongxiang,SHI Pingwu. Selection of reasonable section heights duringtop-coal caving to steep seams[J].Journal of China University of Mining&Technology,2009,38(4):544-548.
[16]王家臣,赵兵文,赵鹏飞,等.急倾斜极软厚煤层走向长壁综放开采技术研究[J].煤炭学报,2017,42(2):286-292.WANG Jiachen,ZHAO Bingwen,ZHAO Pengfei,et al. Research on the longwall top-coal caving mining technique in extremely inclined and softthick coal seam[J].Journal of China Coal Society,2017,42(2):286-292.
[17]刘昌平.大倾角厚煤层长壁综放工面端头支护技术研究[D].西安:西安科技大学,2005:1-7.
[18]贠东风,刘柱,程文东,等.大倾角厚煤层综放支架侧护板载荷监测研究[J].煤炭科学技术,2016,44(9):145-149.YUN Dongfeng,LIU Zhu,CHENG Wendong,et al. Study on loading monitoring of side guard plate powered support of fullymechanized top coal caving mining in high inclined thick seam[J].Coal Science and Technology,2016,44(9):145-149.
[19]伍永平,员东风,张淼丰.大倾角煤层综采基本问题研究[J].煤炭学报,2000,25(5):465-468.WU Yongping,YUAN Dongfeng,ZHANG Miaofeng. Study on the elementary problems of full-mechanized coal mining in greater pitching seam[J]. Journal of China Coal Society,2000,25(5):465-468.
[2] TU Hongsheng,TU Shihao,ZHANG Cun,et al. Characteristics of the roof behaviors and mine pressure manifestations during the mining of steep coal seam[J].Archives of Mining Sciences,2017,62(4):871-891.
[3]谢俊文,高小明,上官科峰.急倾斜厚煤层走向长壁综放开采技术[J].煤炭学报,2005,30(5):3-7.XIE Junwen,GAO Xiaoming,SHANG GUAN Kefeng.Longwall mechanized top-caving techniques along strike in steep-inclined thick coal seam[J].Journal of China Coal Society,2005,30(5):3-7.
[4]黄旭超.急倾斜煤层开采应力及裂隙演化规律研究[J].煤炭科学技术,2018,46(S1):93-96.HUANG Xuchao. Study on stress and fracture evolution law of steeply inclined coal seam[J]. Coal Science and Technology,2018,46(S1):93-96.
[5]孙秉成,李春阁.急倾斜特厚煤层复杂结构条件冲击地压防治技术[J].煤炭科学技术,2017,45(S1):13-15.SUN Bingcheng,LI Chunge.Rock burst control technology of steep and extra thick coal seam under complex structure condition[J].Coal Science and Technology,2017,45(S1):13-15.
[6]李伟,刘俊峰,代少军,等.薄及中厚急倾斜煤层综采工艺及装备研究[J].煤炭科学技术,2017,45(7):27-32.LIWei,LIU Junfeng,DAI Shaojun,et al.Research on fully-mechanized coal mining technology and equipment in thin and medium extremely inclined coal seam[J]. Coal Science and Technology,2017,45(7):27-32.
[7]冯锦艳,刘旭杭,于志全.大倾角煤层采动裂隙演化规律[J].煤炭学报,2017,42(8):1971-1978.FENG Jinyan,LIU Xuhang,YU Zhiquan. Numerical simulation study on the mining-induced fracture evolution of steep coal seam[J].Journal of China Coal Society,2017,42(8):1971-1978.
[8]李小萌.急倾斜综放采场围岩控制技术及支架稳定性研究[D].北京:中国矿业大学(北京),2016:2-10.
[9] BROWN E T. Strength of models of rock with intermittent joints[J].Journal of Soil Mechanics&Foundations Division,1970,96(6):1935-1949.
[10] KULAKOV V N.Stress state in the face region of a sleep coal bed[J].Jounal of Mining Science,1995(9):161-168.
[11]华乐.天河煤矿急倾斜厚煤层采煤方法优化研究[D].淮南:安徽理工大学,2014:6-7.
[12]李俊斌.急(倾)斜煤层柔性掩护支架采煤法[M].徐州:中国矿业大学出版社,2011:7-8.
[13]费巨云,郑超.急倾斜特厚煤层水平分段冲击矿压防治技术研究[J].煤炭工程,2018,50(4):66-69,74.FEI Juyun,ZHENG Chao. Study on rock-burst prevention with horizontal section top coalcaving in steep-inclined and thick coal seam[J].Coal Engineering,2018,50(4):66-69,74.
[14]刘小军.急倾斜厚煤层水平分段综放开采合理段高研究[D].西安:西安科技大学,2014:4-10.
[15]邵小平,张红祥,石平五.急斜煤层分段放顶煤开采合理段高选择研究[J].中国矿业大学学报,2009,38(4):544-548.SHAO Xiaoping,ZHANG Hongxiang,SHI Pingwu. Selection of reasonable section heights duringtop-coal caving to steep seams[J].Journal of China University of Mining&Technology,2009,38(4):544-548.
[16]王家臣,赵兵文,赵鹏飞,等.急倾斜极软厚煤层走向长壁综放开采技术研究[J].煤炭学报,2017,42(2):286-292.WANG Jiachen,ZHAO Bingwen,ZHAO Pengfei,et al. Research on the longwall top-coal caving mining technique in extremely inclined and softthick coal seam[J].Journal of China Coal Society,2017,42(2):286-292.
[17]刘昌平.大倾角厚煤层长壁综放工面端头支护技术研究[D].西安:西安科技大学,2005:1-7.
[18]贠东风,刘柱,程文东,等.大倾角厚煤层综放支架侧护板载荷监测研究[J].煤炭科学技术,2016,44(9):145-149.YUN Dongfeng,LIU Zhu,CHENG Wendong,et al. Study on loading monitoring of side guard plate powered support of fullymechanized top coal caving mining in high inclined thick seam[J].Coal Science and Technology,2016,44(9):145-149.
[19]伍永平,员东风,张淼丰.大倾角煤层综采基本问题研究[J].煤炭学报,2000,25(5):465-468.WU Yongping,YUAN Dongfeng,ZHANG Miaofeng. Study on the elementary problems of full-mechanized coal mining in greater pitching seam[J]. Journal of China Coal Society,2000,25(5):465-468.