螺旋钻采煤机钻头的载荷谱分析
摘要
随着螺旋钻采煤机在薄煤层煤矿开采的广泛使用,其性能受到越来越多的关注。钻头是螺旋钻采煤机的重要工作部件,因此研究钻头参数对于合理设计螺旋钻采煤机钻头很有实际意义。
为了研究螺旋钻采煤机钻头的力学特征和动力学行为,首先通过截齿受力分析,给出了单个截齿上各阻力的计算方法,在此基础上建立了钻头三向载荷的数学模型;利用编制的Matlab程序,模拟得到在不同煤岩、不同结构参数以及不同截齿参数下钻头的载荷波动曲线,分析各参数对螺旋钻采煤机工作性能的影响;最后为了研究其动载荷特征,分析钻头载荷在频域上的分布。应用随机过程理论和概率统计理论,利用计算机模拟程序模拟出钻头的载荷谱曲线。载荷谱的研究为钻头的设计以及钻头结构动力改进提供了参考依据。
研究结果对于合理选择螺旋钻采煤机、正确地确定钻头的结构参数、改善螺旋钻采煤机的性能、提高钻采效率有重要的意义和参考价值。
With the widespread using of the coal auger in thin seam coal mining, its performance gets more and more attention. The cutting bit is the most important working part, so the study of bit parameters has practical significance for reasonable designing of coal auger bit.
In order to study the mechanical characteristics and dynamic behavior of a coal auger bit, first of all, the calculation method of the resistance on each pick is given by the force analysis of picks; a mathematical model of the three directional loads for bit is established in the paper. Load curves in different coal and rock, different structural parameters and picks parameters are obtained by using Matlab program, and then analyze that how parameters influence on the performance of coal auger. Last of all, in order to study the dynamic load characteristics, analyze the distribution on frequency domain of drilling load. By using random process theory and probability and statistics theories, and computer simulation program, simulate the drill loading spectrum curve. The study of loading spectrum has the reference value for the design and improving the dynamic structure of coal auger bit.
These results have important significance and reference values for choosing coal auger, determining the structural parameters of the bit exactly, improving the performance of coal auger and the efficiency of drilling.
为了研究螺旋钻采煤机钻头的力学特征和动力学行为,首先通过截齿受力分析,给出了单个截齿上各阻力的计算方法,在此基础上建立了钻头三向载荷的数学模型;利用编制的Matlab程序,模拟得到在不同煤岩、不同结构参数以及不同截齿参数下钻头的载荷波动曲线,分析各参数对螺旋钻采煤机工作性能的影响;最后为了研究其动载荷特征,分析钻头载荷在频域上的分布。应用随机过程理论和概率统计理论,利用计算机模拟程序模拟出钻头的载荷谱曲线。载荷谱的研究为钻头的设计以及钻头结构动力改进提供了参考依据。
研究结果对于合理选择螺旋钻采煤机、正确地确定钻头的结构参数、改善螺旋钻采煤机的性能、提高钻采效率有重要的意义和参考价值。
With the widespread using of the coal auger in thin seam coal mining, its performance gets more and more attention. The cutting bit is the most important working part, so the study of bit parameters has practical significance for reasonable designing of coal auger bit.
In order to study the mechanical characteristics and dynamic behavior of a coal auger bit, first of all, the calculation method of the resistance on each pick is given by the force analysis of picks; a mathematical model of the three directional loads for bit is established in the paper. Load curves in different coal and rock, different structural parameters and picks parameters are obtained by using Matlab program, and then analyze that how parameters influence on the performance of coal auger. Last of all, in order to study the dynamic load characteristics, analyze the distribution on frequency domain of drilling load. By using random process theory and probability and statistics theories, and computer simulation program, simulate the drill loading spectrum curve. The study of loading spectrum has the reference value for the design and improving the dynamic structure of coal auger bit.
These results have important significance and reference values for choosing coal auger, determining the structural parameters of the bit exactly, improving the performance of coal auger and the efficiency of drilling.
引文
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[8]温庆华.薄煤层开采现状及发展趋势[J].煤炭工程,2009,3:60-61.
[9]梁和平.开滦矿区薄煤层开采技术发展与实践[J].煤矿开采,2009.4 ,14(2):1-2.
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[13] Baotang Shen and Mary Duncan Fama. Geomechanics and Highwall Mining. World Coal, 2001(2):35-38.
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[16]张艳.螺旋钻采煤机在里彦煤矿的应用[J].矿山机械,2008,5(36):9-11.
[17]宋相坤.螺旋钻采煤机钻头设计研究[D].徐州:中国矿业大学,2007.
[18]詹友刚.Pro/ENGINEER中文野火版3.0高级应用教程[M].北京:机械工业出版社,2006:357-362.
[19]梁超.悬臂式纵轴掘进机截齿分布研究及仿真[D].安徽:安徽理工大学研究生论文,2007.6.
[20]徐小奥.钻头截齿安装定位的设计方法[J].煤矿机电,2005(4):11-14.
[21] Zhang Qiang. Optimization design of drilling string by screw coal miner based on ant colony algorithm[J]. Journal of coal& science Engineering, 2008,12: 782-786.
[22]高春花,范春梅,高志明.掘进机切割头截齿排列表示方法的探讨[J].煤矿机械,1998,3:25-27.
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[24]崔志琴,杨瑞峰.复杂机械结构的参数化建模及模态分析[J].机械工程学报,2008,44(2) :234-237.
[25] N. Bilgin,M.A. Dmircin. Dominant rock properties affecting the performance of conical picks and the comparison of some experimental and theoretical results[C]. International Journal of Rock Mechanics&Mining Science, 2006.
[26]徐晓荷,余静.岩石破碎学「M].煤炭工业出版社,1994.
[27]ЕЗ保晋,ВЗ乜拉麦德,ВВ顿.采煤机破煤理论(中译本)[M].北京:煤炭工业出版社,1992.
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[30]李晓豁,程东棠.掘进机截割头载荷的模拟研究[J].阜新矿业学院学报,1990,9.9(3):88-94.
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[32]李晓豁.采煤机螺旋滚筒随机载荷的模拟[J].黑龙江科技学院学报,2001,11(4):8-10.
[33] LI Xiaohuo, LIN Qiyue, ZHONG Conghai. Study on motion parameters of coal auger bits[J]. Journal of Liaoning Technical University,2009.28(6):798-800.
[34]宋相坤,杜长龙.螺旋钻采煤机钻头运动学研究[J].煤矿机电,2008(2):16-18.
[35]李晓豁.掘进机截割头设计与研究[M].中国华侨出版社,1997.
[36] Miao Xiexing, Zhang Jixiong, Feng Meimei. Waste-filling in fully-mechanized coal mining and its application[J]. Journal of China University of Mining & Technology, 2008(4):479-482.
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