磨料射流定向切顶系统的设计与研制
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TD431

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长江学者和创新团队发展计划资助项目(IRT17R112)。


Development and optimization of abrasive water-jet directional slitting machine for coal mine
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    摘要:

    N00工法是一种节约资源并能降低开采成本的长壁采煤工法,快速无伤定向切割顶板岩石使采空区顶板垮落是该工法的关键。基于水射流理论与技术,提出了利用磨料射流定向切割顶板的新思路,研究了磨料射流定向切顶系统的结构组成及工作原理,设计了水射流喷嘴、切割喷头、定向器、输送机及磨料供给系统等关键部件的结构与尺寸,通过实验优化了磨料射流定向切顶的最优工作参数,并于陕西某矿S1201-Ⅱ工作面进行了顶板切割试验。结果表明,在射流压力25 MPa,喷嘴直径1.5 mm,磨料类型黄沙/石英砂,磨料质量分数3.5%,切割速度4.4 mm/s条件下,系统可在1个循环时间(50 min)、1个步距(840 mm)范围内对7 000~8 000 mm长度的4孔同步定向切缝,实现对留巷顶板的快速高效定向切割。

    Abstract:

    The N00 method is a highly efficient and resource saving mining method, and its key step is to quickly separate the gob roof and the roadway roof by making a slit between them. Based on the water jet theory and technology, a new idea of using abrasive jet directional cutting roof was proposed. The structural composition and working principle of the abrasive jet directional cutting system were studied, and the water jet nozzle, cutting nozzle, orienter, conveyor, abrasive were designed. Through experiments, the working parameters of the abrasive jet directional cutting were optimized. The roof cutting test was carried out on the S1201-Ⅱ working face of a mine in Shaanxi. The results show that under the conditions of jet pressure 25 MPa, nozzle diameter 1.5 mm, abrasive type yellow sand/quartz sand, abrasive mass concentration 3.5% and cutting speed 4.4 mm/s, the developed system is able to make slits at the same time in 4 holes of 7 000-8 000 mm deep within a cycle time (50 min).

    参考文献
    [1] 何满潮. 长壁开采N00工法:CN105240013A[P]. 2016-01-13.He M C. Longwall mining N00 construction method:CN105240013A[P]. 2016-01-13. (in Chinese)
    [2] 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):1-9,13.He M C, Song Z Q, Wang A, et al. Theory of longwall mining by using roof cuting shortwall team and 110 method-the third mining science and technology reform[J]. Coal Science & Technology Magazine, 2017(1):1-9,13. (in Chinese)
    [3] Wang Y J, He M C, Yang J, et al. Case study on pressure-relief mining technology without advance tunneling and coal Pillars in longwall mining[J]. Tunnelling and Underground Space Technology, 2020, 97:103236.
    [4] Lu Y Y, Tang J R, Ge Z L, et al. Hard rock drilling technique with abrasive water jet assistance[J]. International Journal of Rock Mechanics and Mining Sciences, 2013, 60:47-56.
    [5] Mao H, Yang Y, Zhang H, et al. A critical review of the possible effects of physical and chemical properties of subcritical water on the performance of water-based drilling fluids designed for ultra-high temperature and ultra-high pressure drilling applications[J]. Journal of Petroleum Science and Engineering, 2020, 187:106795.
    [6] Wang H Y, Xia B W, Lu Y Y, et al. Experimental study on sonic vibrating effects of cavitation water jets and its promotion effects on coalbed methane desorption[J]. Fuel, 2016, 185:468-477.
    [7] Lu Y Y, Liu Y, Li X H, et al. A new method of drilling long boreholes in low permeability coal by improving its permeability[J]. International Journal of Coal Geology, 2010, 84(2):94-102.
    [8] 李晓红, 卢义玉, 赵瑜, 等. 高压脉冲水射流提高松软煤层透气性的研究[J]. 煤炭学报, 2008, 33(12):1386-1390.Li X H, Lu Y Y, Zhao Y, et al. Study on improving the permeability of soft coal seam with high pressure pulsed water jet[J]. Journal of China Coal Society, 2008, 33(12):1386-1390. (in Chinese)
    [9] 汤积仁, 卢义玉, 葛兆龙, 等. 磨料射流联合机械齿提高硬岩钻进效率研究[J]. 采矿与安全工程学报, 2013, 30(4):621-627.Tang J R, Lu Y Y, Ge Z L, et al. Combined drilling of hard rock with abrasive water jet and mechanical bit to improve drilling efficiency[J]. Journal of Mining & Safety Engineering, 2013, 30(4):621-627. (in Chinese)
    [10] 李晓红, 冯明涛, 周东平, 等. 空化水射流声震效应强化煤层瓦斯解吸渗流的实验[J]. 重庆大学学报, 2011, 34(4):1-5.Li X H, Feng M T, Zhou D P, et al. Experimental analysis of coal bed methane desorption and seepage under sonic vibrating of cavitation water jets[J]. Journal of Chongqing University, 2011, 34(4):1-5. (in Chinese)
    [11] 卢义玉, 李良伟, 汤积仁, 等. 前混合磨料水射流连续加料系统设计与实验研究[J]. 重庆大学学报, 2018, 41(8):111-120.Lu Y Y, Li L W, Tang J R, et al. Design and experimental research of the continuous feeding system of premixed abrasive water jet[J]. Journal of Chongqing University, 2018, 41(8):111-120. (in Chinese)
    [12] 周东平, 卢义玉, 康勇, 等. 磨料射流割缝技术防突机理及应用[J]. 重庆大学学报, 2010, 33(7):86-90.Zhou D P, Lu Y Y, Kang Y, et al. Mechanism and application of protection against outburst for abrasive water jet slotting technology[J]. Journal of Chongqing University, 2010, 33(7):86-90. (in Chinese)
    [13] 黄飞, 胡斌, 左伟芹, 等. 不同形状喷嘴的高压水射流冲击力特性实验[J]. 重庆大学学报, 2019, 42(9):124-133.Huang F, Hu B, Zuo W Q, et al. Experiments on the impact pressure of high-pressure water jet under different nozzle shapes[J]. Journal of Chongqing University, 2019, 42(9):124-133. (in Chinese)
    [14] 卢义玉, 张磊, 葛兆龙, 等. 煤层割缝器用双梯度喷嘴结构设计与优化[J]. 重庆大学学报, 2014, 37(1):84-90.Lu Y Y, Zhang L, Ge Z L, et al. Structure design and optimization of dual gradient nozzle used in coal mine[J]. Journal of Chongqing University, 2014, 37(1):84-90. (in Chinese)
    [15] 卢义玉, 汤积仁, 林晓东, 等. 一种磨料自动供给装置及使用方法:CN103100984A[P]. 2013-05-15.Lu Y Y, Tang J R, Lin X D, et al. Abrasive automatic feeding device and using method:CN103100984A[P]. 2013-05-15. (in Chinese)
    [16] 康红普, 司林坡, 苏波. 煤岩体钻孔结构观测方法及应用[J]. 煤炭学报, 2010, 35(12):1949-1956.Kang H P, Si L P, Su B. Borehole observation methods in coal and rock mass and their applications[J]. Journal of China Coal Society, 2010,35(12):1949-1956. (in Chinese)
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卢义玉,秦旭前,汤积仁,章文峰,凌远非,李倩.磨料射流定向切顶系统的设计与研制[J].重庆大学学报,2022,45(2):1-13.

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  • 收稿日期:2020-06-01
  • 在线发布日期: 2022-02-16
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