煤层倾角对滚筒工作性能影响的仿真研究
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摘要
为研究采煤机滚筒与围岩的相互作用机制,以MG500/1180-WD型号采煤机为研究对象,利用EDEM离散元仿真软件建立滚筒截割过程的三维仿真模型,综合考虑煤岩块度、顶板压力对滚筒工作性能的影响,研究采煤机截割煤岩的动态过程,分析工作倾角、走向倾角对采煤机装煤率、截割阻力及截割比能耗等因素的影响。结果表明:当工作倾角在-20°～0°范围内,走向倾角在0°～10°范围内时,其对采煤机工作性能影响较小,能够满足采煤机的装煤效率,及截割稳定性。当工作倾角绝对值较大,走向倾角为负值或绝对值较大时,其对采煤机工作性能影响显著,可考虑改变采煤机工作参数,如:降低滚筒转速、提高采煤机牵引速度,适当调整截深有效提高采煤机工作性能。为实现采煤机高效截割提供了改进参考。
To study the interaction mechanism of shearer and the surrounding rock,using the MG500/1180-WD shearer model as research objects,EDEM discrete element simulation software is used to establish the three-dimensional simulation model,Considered the effect of the factor which is coal fragmentation and roof pressure on the performance of shearer cutting. Study on the dynamic process of shearer cutting.Using single-factor method to study the effect of coal seam dip angle on the factor of coal loading rate、cutting resistance and special energy consummation for cutting. Study on the wear of cuttings under different working conditions. The results show that when the dip angle is in the range of 0 ° ～ 10 ° in the range of-20 ° ～ 0 °, the effect on the working performance of the shearer is small, which can satisfy the coal loading efficiency of the shearer. Cutting stability. When the absolute value of the dip angle is large, the inclination angle is negative or the absolute value is large, it has a significant effect on the working performance of the shearer. It may be considered to change the working parameters of the shearer, such as reducing the drum speed, Speed, adjust the cutting depth to improve the performance of coal miners, in order to achieve efficient cutting shearer provides an improved reference.
To study the interaction mechanism of shearer and the surrounding rock,using the MG500/1180-WD shearer model as research objects,EDEM discrete element simulation software is used to establish the three-dimensional simulation model,Considered the effect of the factor which is coal fragmentation and roof pressure on the performance of shearer cutting. Study on the dynamic process of shearer cutting.Using single-factor method to study the effect of coal seam dip angle on the factor of coal loading rate、cutting resistance and special energy consummation for cutting. Study on the wear of cuttings under different working conditions. The results show that when the dip angle is in the range of 0 ° ～ 10 ° in the range of-20 ° ～ 0 °, the effect on the working performance of the shearer is small, which can satisfy the coal loading efficiency of the shearer. Cutting stability. When the absolute value of the dip angle is large, the inclination angle is negative or the absolute value is large, it has a significant effect on the working performance of the shearer. It may be considered to change the working parameters of the shearer, such as reducing the drum speed, Speed, adjust the cutting depth to improve the performance of coal miners, in order to achieve efficient cutting shearer provides an improved reference.
引文
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[13] 路占元,贺永亮,郝鑫.利用模糊数学探究煤层大倾角范围[J].煤炭技术,2014(05):292-293.LU ZhanYuan,HE YongLiang,HAO Xin.Using fuzzy mathematics principle to study range of coal seam with large dip angle[J].Coal Technology,2014(05):292-293 (In Chinese).
[14] 伍永平,刘孔智,贠东风,等.大倾角煤层安全高效开采技术研究进展[J].煤炭学报,2014,39(08):1611-1618.WU YongPing,Liu KongZhi,YUN DongFeng,et al.Research progress on the safe and efficient mining technology of steeply dipping seam[J].Journal of China Coal Society,2014,39(8):1611-1618 (In Chinese).
[15] 保晋Е З.采煤机破煤理论[M].王庆康,译.北京:煤炭工业出版社,1992:140-181.E.3.Bao Jin.s.Coal cutting theory [M].Wang QingKang Jr.Beijing:China Industrial Press,1992:140-181(In Chinese)
[16] 郝志勇,张佩,闫闯,等.采煤机端盘截齿载荷特性研究[J].机械强度,2017,39(02):360-366.HAO ZhiYong,ZHANG Pei,YAN Chuang,et al.Analysis on the influence of the load the end plate[J].Journal of Mechanical Strength,2017,39 (02):360-366 (In Chinese).
[2] 刘春生,戴淑芝.双滚筒式采煤机整机力学模型与解算方法[J].黑龙江科技学院学报,2012(01):33-38.LIU ChunSheng,DAI ShuZhi.Mechanical modelling of whole double-drum shearer and its solution[J].Journal of Heilongjiang Institute of Science &Technology,2012(01):33-38 (In Chinese).
[3] 赵永生,杨怀东,赵庆禹.大倾角煤层综采工作面采煤机可靠性分析[J].煤矿机械,2013(08):103-104.ZHAO YongSheng,YANG HuaiDong,ZHAO QingYu.Analysis on Reliability of Shearer on High Inclined Fully Mechanized Working Face[J].Coal Mine Machinery,2013 (08):103-104 (In Chinese).
[4] Das A J,Mandal P K,Bhattacharjee R,et al.Evaluation of stability of underground workings for exploitation of an inclined coal seam by the ubiquitous joint model[J].International Journal of Rock Mechanics & Mining Sciences,2017(93):101-114.
[5] 毛君,刘歆妍,陈洪月,等.基于EDEM的采煤机滚筒工作性能的仿真研究[J].煤炭学报,2017,(04):1069-1077.MAO Jun,LIU XinYan,CHEN HongYue,et al.Simulation research of shearer drum cutting performance based on EDEM [J].Journal of China Coal Society,2017,42(4):1069-1077 (In Chinese).
[6] 李玉伟.割理煤岩力学特性与压裂起裂机理研究[D].大庆:东北石油大学,2014:31-66.LI YuWei.Study on mechanical behavior and fractures cracking mechanism in hydraulic fracturing of coal bed with cleats[D].Daqing:Northeast Petroleum University,2014:31-66 (In Chinese).
[7] 杨健健,符世琛,姜海,等.基于模糊判据的煤岩性状截割硬度识别[J].煤炭学报,2015,40(S2):540-545.YANG JianJian,FU ShiChen,JIANG Hai,er al.Recognition of cutting hardness of coal rock properties based on fuzzy criteria[J].Journal of China Coal Society,2015,40(S2):540-545 (In Chinese).
[8] 孙广义,潘启新,黄占龙.单体支柱工作面顶板压力计算的探讨[J].黑龙江矿业学院学报,1998,8(1):6-9.SUN GuangYi,PAN QiXin,HUANG ZhanLong.Analysis of roof pressure on divided support in longwall face[J].Journal of Heilongjiang Mining Institute,1998,8(1):6-9 (In Chinese).
[9] 孙广义,马云东,李东.顶板压力计算的盲数辨识研究[J].辽宁工程技术大学学报,2003,22(S1):7-8.SUN GuangYi,MA YunDong,LI Dong.Study on the blind number recognition of the calculation of roof pressure[J].Journal of Liaoning Technical University,2003,22(S1):7-8 (In Chinese).
[10] Wang Jinhua.Development and prospect on fully mechanized mining in Chinese coal mines[J].International Journal of Coal Science & Technology,2014,1(3):153-260.
[11] Wang Jinhua,Yu Bin,Kang Hongpu,et al.Key technologies and equipment for a fully mechanized top-coal caving operation with a large mining height at ultra-thick coal seams[J].International Journal of Coal Science & Technology,2015,2(2):97-161.
[12] 高魁东.薄煤层滚筒采煤机装煤性能研究[D].徐州:中国矿业大学,2014:102-103.Gao Kuidong.Study on coal-loading performance of thin coal seam shearer[D].Xuzhou:China University of Mining & Technology,2014:102-103 (In Chinese).
[13] 路占元,贺永亮,郝鑫.利用模糊数学探究煤层大倾角范围[J].煤炭技术,2014(05):292-293.LU ZhanYuan,HE YongLiang,HAO Xin.Using fuzzy mathematics principle to study range of coal seam with large dip angle[J].Coal Technology,2014(05):292-293 (In Chinese).
[14] 伍永平,刘孔智,贠东风,等.大倾角煤层安全高效开采技术研究进展[J].煤炭学报,2014,39(08):1611-1618.WU YongPing,Liu KongZhi,YUN DongFeng,et al.Research progress on the safe and efficient mining technology of steeply dipping seam[J].Journal of China Coal Society,2014,39(8):1611-1618 (In Chinese).
[15] 保晋Е З.采煤机破煤理论[M].王庆康,译.北京:煤炭工业出版社,1992:140-181.E.3.Bao Jin.s.Coal cutting theory [M].Wang QingKang Jr.Beijing:China Industrial Press,1992:140-181(In Chinese)
[16] 郝志勇,张佩,闫闯,等.采煤机端盘截齿载荷特性研究[J].机械强度,2017,39(02):360-366.HAO ZhiYong,ZHANG Pei,YAN Chuang,et al.Analysis on the influence of the load the end plate[J].Journal of Mechanical Strength,2017,39 (02):360-366 (In Chinese).