急倾斜厚煤层走向长壁综放开采支架稳定性分析
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摘要
针对急倾斜厚煤层走向长壁综放开采中支架参数设计问题,根据工作面支架与围岩关系特点,分析了支架侧护板抗挤压能力的重要性;结合"下行动态分段、段内上行放煤"的采放工艺,通过支架受力分析建立了平衡方程,分别计算出了段内支架侧护板抗倾倒和抗下滑受力大小;以大远煤业1201急倾斜工作面为背景建立PFC2D计算模型,得出了保持支架稳定的侧护板抗挤压能力为763 k N,验证了现场所用ZFY4800/17/28型综放支架的可靠性;对影响支架稳定性的各因素进行了分析,提出了在急倾斜走向长壁综放开采工作面应采用大宽高比、低重心、低重量综放支架,应合理控制采高、工作面倾角以及增大支架与顶底板间摩擦等措施,以减小支架发生倾倒下滑的可能性,确保支架侧护板可以发挥良好的导向、调架功能。
Aimed at the problems of support parameter around the longwall top-coal caving mining in steeply thick coal seam,it determines the importance of the side plate's anti-extrusion capacity based on analyzing the relationship of support and surrounding rock in the working face.The force of resisting dumping and glide on the side plate of supports is calculated by combining the method of drawing downward segment by segment while drawing upward in each segment with supports' mechanical equilibrium equation.The side plate's anti-extrusion capacity eventually presents 763 k N which is obtained from distinct element numerical calculations established in PFC2 Dbased on the extremely inclined panel No.1201 in Dayuan Coal Mine,then the function of support is proved credible in fully mechanized caving face equipped with ZFY4800/17/28.Analyzing influences of support stability,the measures,such as equipping support with large aspect ratio,low center of gravity and low weight,matching general mining height,adjusting face inclination and increasing frictions among support,roof and floor,are put forward to decrease the unfavorable factors for supports and ensure fine guide and adjust function.
Aimed at the problems of support parameter around the longwall top-coal caving mining in steeply thick coal seam,it determines the importance of the side plate's anti-extrusion capacity based on analyzing the relationship of support and surrounding rock in the working face.The force of resisting dumping and glide on the side plate of supports is calculated by combining the method of drawing downward segment by segment while drawing upward in each segment with supports' mechanical equilibrium equation.The side plate's anti-extrusion capacity eventually presents 763 k N which is obtained from distinct element numerical calculations established in PFC2 Dbased on the extremely inclined panel No.1201 in Dayuan Coal Mine,then the function of support is proved credible in fully mechanized caving face equipped with ZFY4800/17/28.Analyzing influences of support stability,the measures,such as equipping support with large aspect ratio,low center of gravity and low weight,matching general mining height,adjusting face inclination and increasing frictions among support,roof and floor,are put forward to decrease the unfavorable factors for supports and ensure fine guide and adjust function.
引文
[1]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):545-549.XIE Junwen,GAO Xiaoming,SHANGGUAN Kefeng.Long wall m-echanized top-caving techniques along strike in steepinclined thick coal seam[J].Journal of China Coal Society,2005,30(5):545-549.
[2]章之燕.大倾角综放液压支架稳定性动态分析和防倒防滑措施[J].煤炭学报,2007,32(7):705-709.ZHANG Zhiyan.Dynamic analysis on stability of hydraulic powered support in deep inclined fully mechanized wall and prevention slips measures[J].Journal of China Coal Society,2007,32(7):705-709.
[3]石建军,师皓宇,包寿胜,等.大倾角综采工作面液压支架参数设计及其与围岩关系[J].煤炭学报,2012,37(S2):313-318.SHI Jianjun,SHI Haoyu,BAO Shousheng,et al.The hydraulic support parameter design in lean coal seam and numerical simulation about the relation hydraulic support and surround rock[J].Journal of China Coal Society,2012,37(S2):313-318.
[4]王金安,焦军灵,程文东.论大倾角长壁综放工作面圆弧段对支架稳定性的控制作用[J].煤炭学报,2015,40(10):2361-2369.WANG Jin’an,JIAO Junling,CHENG Wendong.Roles of arc segment in controlling the support stability in longwall fully mechanized top coal caving mining face of steeply inclined coal seam[J].Journal of China Coal Society,2015,40(10):2361-2369.
[5]伍永平.大倾角煤层开采“顶板-支护-底板”系统稳定性及动力学模型[J].煤炭学报,2004,29(5):527-531.WU Yongping.Dynamic model and stability of system“roof-supportfloor”in steeply dipping seam mining[J].Journal of China Coal Society,2004,29(5):527-531.
[6]伍永平.大倾角煤层开采“顶板-支护-底板”系统的动力学方程[J].煤炭学报,2005,30(6):685-690.WU Yongping.Dynam ic equation of system“roof(R)-support(S)-floor(F)”in steeply dipping seam mining[J].Journal of China Coal Society,2005,30(6):685-690.
[7]伍永平.大倾角采场“顶板-支护-底板”系统动力学方程求解及其工作阻力的确定[J].煤炭学报,2006,31(6):736-741.WU Yongping.Keys to dynamic equations of system R-S-F and determ ination on working resistance of face support in steeply dipping seam mining[J].Journal of China Coal Society,2006,31(6):736-741.
[8]解盘石,伍永平,王红伟,等.大倾角煤层长壁采场倾斜砌体结构与支架稳定性分析[J].煤炭学报,2012,37(8):1275-1280.XIE Panshi,WU Yongping,WANG Hongwei,et al.Stability analysis of incline masonry structure and support around longwall mining face area in steeply dipping seam[J].Journal of China Coal Society,2012,37(8):1275-1280.
[9]王红伟,伍永平,解盘石,等.大倾角特厚煤层综放液压支架工作阻力确定[J].辽宁工程技术大学学报(自然科学版),2014,33(8):1020-1024.WANG Hongwei,WU Yongping,XIE Panshi,et al.Determination of support working resistance of fully-mechanized caving in steeply dipping seam with ultra thick[J].Journal of Liaoning Technical University(Natural Science),2014,33(8):1020-1024.
[10]张勇,张保,刘金凯.急倾斜厚煤层走向长壁开采底板破坏滑移机理[J].煤炭科学技术,2013,41(10):9-12.ZHANG Yong,ZHANG Bao,LIU Jinkai.Damage and slip mechanism of floor in longwall mining on the strike of steep and thick coal seam[J].Coal Science and Technology,2013,41(10):9-12.
[11]QIAO Jianyong.On the preimages of parabolic periodic points[J].Nonlinearity,2000,13(3):813-818.
[12]王家臣,张锦旺.综放开采顶煤放出规律的BBR研究[J].煤炭学报,2015,40(3):487-493.WANG Jiachen,ZHANG Jinwang.BBR study of top-coal drawing law in longwall top-coal caving mining[J].Journal of China Coal Society,2015,40(3):487-493.
[13]王家臣,魏立科,张锦旺,等.综放开采顶煤放出规律三维数值模拟[J].煤炭学报,2013,38(11):1905-1911.WANG Jiachen,WEI Like,ZHANG Jinwang,et al.3-D numerical simulation on the top-coal movement law under caving mining technique[J].Journal of China Coal Society,2013,38(11):1905-1911.
[14]WANG Jiachen,YANG Shengli,LI Yang,et al.Caving mechanisms of loose top-coal in longwall top-coal caving mining method[J].International Journal of Rock Mechanics and Mining Sciences,2014,71(10):160-170.
[15]王家臣,张锦旺,陈祎.基于BBR体系的提高综放开采顶煤采出率工艺研究[J].矿业科学学报,2016,1(1):38-48.WANG Jiachen,ZHANG Jinwang,CHEN Yi.Research on technology of improving top-coal recovery in longwall top-coal caving mining based on BBR system[J].Journal of Mining Science and Technology,2016,1(1):38-48.
[16]王家臣,张锦旺.急倾斜厚煤层综放开采顶煤采出率分布规律研究[J].煤炭科学技术,2015,43(12):1-7.WANG Jiachen,ZHANG Jinwang.Study on top-coal recovery ratio distribution law of longwall top-coal caving mining in steeply thick coal seam[J].Coal Science and Technology,2015,43(12):1-7.
[17]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 soft thick coal seam[J].Journal of China Coal Society,2017,42(2):286-292.
[2]章之燕.大倾角综放液压支架稳定性动态分析和防倒防滑措施[J].煤炭学报,2007,32(7):705-709.ZHANG Zhiyan.Dynamic analysis on stability of hydraulic powered support in deep inclined fully mechanized wall and prevention slips measures[J].Journal of China Coal Society,2007,32(7):705-709.
[3]石建军,师皓宇,包寿胜,等.大倾角综采工作面液压支架参数设计及其与围岩关系[J].煤炭学报,2012,37(S2):313-318.SHI Jianjun,SHI Haoyu,BAO Shousheng,et al.The hydraulic support parameter design in lean coal seam and numerical simulation about the relation hydraulic support and surround rock[J].Journal of China Coal Society,2012,37(S2):313-318.
[4]王金安,焦军灵,程文东.论大倾角长壁综放工作面圆弧段对支架稳定性的控制作用[J].煤炭学报,2015,40(10):2361-2369.WANG Jin’an,JIAO Junling,CHENG Wendong.Roles of arc segment in controlling the support stability in longwall fully mechanized top coal caving mining face of steeply inclined coal seam[J].Journal of China Coal Society,2015,40(10):2361-2369.
[5]伍永平.大倾角煤层开采“顶板-支护-底板”系统稳定性及动力学模型[J].煤炭学报,2004,29(5):527-531.WU Yongping.Dynamic model and stability of system“roof-supportfloor”in steeply dipping seam mining[J].Journal of China Coal Society,2004,29(5):527-531.
[6]伍永平.大倾角煤层开采“顶板-支护-底板”系统的动力学方程[J].煤炭学报,2005,30(6):685-690.WU Yongping.Dynam ic equation of system“roof(R)-support(S)-floor(F)”in steeply dipping seam mining[J].Journal of China Coal Society,2005,30(6):685-690.
[7]伍永平.大倾角采场“顶板-支护-底板”系统动力学方程求解及其工作阻力的确定[J].煤炭学报,2006,31(6):736-741.WU Yongping.Keys to dynamic equations of system R-S-F and determ ination on working resistance of face support in steeply dipping seam mining[J].Journal of China Coal Society,2006,31(6):736-741.
[8]解盘石,伍永平,王红伟,等.大倾角煤层长壁采场倾斜砌体结构与支架稳定性分析[J].煤炭学报,2012,37(8):1275-1280.XIE Panshi,WU Yongping,WANG Hongwei,et al.Stability analysis of incline masonry structure and support around longwall mining face area in steeply dipping seam[J].Journal of China Coal Society,2012,37(8):1275-1280.
[9]王红伟,伍永平,解盘石,等.大倾角特厚煤层综放液压支架工作阻力确定[J].辽宁工程技术大学学报(自然科学版),2014,33(8):1020-1024.WANG Hongwei,WU Yongping,XIE Panshi,et al.Determination of support working resistance of fully-mechanized caving in steeply dipping seam with ultra thick[J].Journal of Liaoning Technical University(Natural Science),2014,33(8):1020-1024.
[10]张勇,张保,刘金凯.急倾斜厚煤层走向长壁开采底板破坏滑移机理[J].煤炭科学技术,2013,41(10):9-12.ZHANG Yong,ZHANG Bao,LIU Jinkai.Damage and slip mechanism of floor in longwall mining on the strike of steep and thick coal seam[J].Coal Science and Technology,2013,41(10):9-12.
[11]QIAO Jianyong.On the preimages of parabolic periodic points[J].Nonlinearity,2000,13(3):813-818.
[12]王家臣,张锦旺.综放开采顶煤放出规律的BBR研究[J].煤炭学报,2015,40(3):487-493.WANG Jiachen,ZHANG Jinwang.BBR study of top-coal drawing law in longwall top-coal caving mining[J].Journal of China Coal Society,2015,40(3):487-493.
[13]王家臣,魏立科,张锦旺,等.综放开采顶煤放出规律三维数值模拟[J].煤炭学报,2013,38(11):1905-1911.WANG Jiachen,WEI Like,ZHANG Jinwang,et al.3-D numerical simulation on the top-coal movement law under caving mining technique[J].Journal of China Coal Society,2013,38(11):1905-1911.
[14]WANG Jiachen,YANG Shengli,LI Yang,et al.Caving mechanisms of loose top-coal in longwall top-coal caving mining method[J].International Journal of Rock Mechanics and Mining Sciences,2014,71(10):160-170.
[15]王家臣,张锦旺,陈祎.基于BBR体系的提高综放开采顶煤采出率工艺研究[J].矿业科学学报,2016,1(1):38-48.WANG Jiachen,ZHANG Jinwang,CHEN Yi.Research on technology of improving top-coal recovery in longwall top-coal caving mining based on BBR system[J].Journal of Mining Science and Technology,2016,1(1):38-48.
[16]王家臣,张锦旺.急倾斜厚煤层综放开采顶煤采出率分布规律研究[J].煤炭科学技术,2015,43(12):1-7.WANG Jiachen,ZHANG Jinwang.Study on top-coal recovery ratio distribution law of longwall top-coal caving mining in steeply thick coal seam[J].Coal Science and Technology,2015,43(12):1-7.
[17]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 soft thick coal seam[J].Journal of China Coal Society,2017,42(2):286-292.