岩土力学 ›› 2022, Vol. 43 ›› Issue (12): 3372-3384.doi: 10.16285/j.rsm.2022.0067

• 基础理论与实验研究 • 上一篇    下一篇

贯入角度对截齿破岩性能与几何排布的影响研究

肖建成1, 2，卢景景1, 2，周辉1, 2，徐福通1, 2，冯春3   

  1. 1. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，湖北 武汉 430071；2. 中国科学院大学，北京 100049； 3. 中国科学院力学研究所 流固耦合系统力学重点实验室，北京 100190
  • 收稿日期:2022-01-14 修回日期:2022-03-12 出版日期:2022-12-28 发布日期:2023-01-02
  • 通讯作者: 卢景景，女，1985年生，博士，助理研究员，主要从事岩石力学与工程方面的研究工作。E-mail: jjlu@whrsm.ac.cn E-mail:xiaojiancheng19@mails.ucas.ac.cn
  • 作者简介:肖建成，男，1996年生，博士研究生，主要从事岩石力学与数值模拟方面的研究工作。
  • 基金资助:
    国家自然科学基金（No.41941018）；中国科学院基础前沿科学研究计划（No.ZDBS-LY-DQC022）；武汉市知识创新专项?基础研究项目（No.2022010801010160）。

Influence of penetration angle on rock breaking performance and geometrical arrangement of picks

XIAO Jian-cheng1, 2, LU Jing-jing1, 2, ZHOU Hui1, 2, XU Fu-tong1, 2, FENG Chun3   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2022-01-14 Revised:2022-03-12 Online:2022-12-28 Published:2023-01-02
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41941018), the Key Research Program of Frontier Sciences of Chinese Academy of Sciences (ZDBS-LY- DQC022) and the Knowledge Innovation Program of Wuhan - Basic Research (2022010801010160).

PDF (Chinese)

200

摘要： 截齿贯入角度是双轮铣槽机布齿系统设计中的关键因素之一。基于连续−非连续单元法（CDEM），建立截齿不同角度冲击贯入破岩的数值模型，通过断裂能本构模型实现岩体弹性−损伤−断裂的破裂过程，开展截齿有效角度50º～90º区间内的9组冲击贯入破岩模拟，研究贯入角度对截齿破岩性能的影响规律，讨论贯入角度对截齿几何排布的影响，总结布齿系统的截齿几何排布规律。结果表明，当贯入角度从90º降低到50º时，岩体由张拉−拉剪破裂向剪切−拉剪破裂转变，截齿平均贯入力与破碎程度提高，截齿的跃进式侵入特性的显著性减低；贯入角度为75º～90º的第I类截齿与小于55º的第III类截齿在破岩中起辅助作用，贯入角度为55º～75º的第II类截齿可在岩体内部产生范围较大的水平非贯通裂隙，在布齿系统破碎岩体过程中发挥主要作用；2个第II类截齿先后贯入岩体可较好地破碎截线间的岩体，可构成一类基本破岩单元，多个基本破岩单元按照正弦线形式排布，由此形成了一种布齿系统设计方法。研究成果为完善双轮铣槽机布齿系统设计方法，打破国外在双轮铣槽机布齿系统设计方法上的技术壁垒提供了理论基础。

关键词: 双轮铣槽机, 冲击破岩机制, 布齿系统, 贯入角度, 连续?非连续单元法（CDEM）

Abstract: The penetration angle of pick is one of the key factors in the design of tooth arrangement system of double-wheel trench cutter. Based on the continuum-discontinuum element method (CDEM), a numerical model for picks to penetrate the rock at different angles is established, and the elastic-damage-fracture fracture process of rock mass is realized by the fracture energy constitutive model. Nine groups of impact penetration rock breaking simulations are carried out within the pick’s effective angle range of 50º to 90º. The influence of penetration angle on the rock breaking performance of pick is studied, and the influence of penetration angle on the geometric arrangement of pick is discussed. The geometric arrangement principle of the pick of the tooth arrangement system is summarized. The results show that when the penetration angle decreases from 90º to 50º, the rock mass changes from tension and tension-shear fracture to shear and tension-shear fracture, the average penetration force and crushing degree of pick increase, and the leaping invasion characteristic of pick decreases significantly. Type I picks with penetration angles of 75º−90ºand type III picks with penetration angles of less than 55º play an auxiliary role in rock breaking, while type II picks with penetration angles of 55º to 75º can produce a wide range of horizontal non-penetrating cracks in the rock mass and play a major role in the process of breaking rock mass in the tooth arrangement system. Two type II picks have successively penetrated into the rock mass between the better broken sections of the rock mass, two type II picks forming the mechanical model of the basic rock breaking unit, and several basic rock breaking units are arranged according to the sinusoidal form, thus forming a design method of tooth arrangement system. The research results provide a theoretical basis for perfecting the design method of the tooth arrangement system of the double-wheel trench cutter and breaking the technical barriers in the design method of the tooth arrangement system of the double-wheel trench cutter abroad.

Key words: double-wheel trench cutter, impact rock breaking mechanism, tooth arrangement system, penetration angle, continuum- discontinuum element method (CDEM)

中图分类号: 

  • TU94，TU452
[1] 肖建成, 周辉, 卢景景, 冯春, 徐福通, . 双轮铣槽机铣削过程及截齿入岩顺序优化研究[J]. 岩土力学, 2022, 43(4): 981-994.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] 姚仰平，侯 伟. 土的基本力学特性及其弹塑性描述[J]. , 2009, 30(10): 2881 -2902 .
[2] 徐金明,羌培,张鹏飞. 粉质黏土图像的纹理特征分析[J]. , 2009, 30(10): 2903 -2907 .
[3] 向天兵，冯夏庭，陈炳瑞，江 权，张传庆. 三向应力状态下单结构面岩石试样破坏机制与真三轴试验研究[J]. , 2009, 30(10): 2908 -2916 .
[4] 石玉玲，门玉明，彭建兵，黄强兵，刘洪佳. 地裂缝对不同结构形式桥梁桥面的破坏试验研究[J]. , 2009, 30(10): 2917 -2922 .
[5] 夏栋舟，何益斌，刘建华. 土-结构动力相互作用体系阻尼及地震反应分析[J]. , 2009, 30(10): 2923 -2928 .
[6] 徐速超，冯夏庭，陈炳瑞. 矽卡岩单轴循环加卸载试验及声发射特性研究[J]. , 2009, 30(10): 2929 -2934 .
[7] 张力霆，齐清兰，魏静，霍倩，周国斌. 淤填黏土固结过程中孔隙比的变化规律[J]. , 2009, 30(10): 2935 -2939 .
[8] 张其一. 复合加载模式下地基失效机制研究[J]. , 2009, 30(10): 2940 -2944 .
[9] 易 俊，姜永东，鲜学福，罗 云，张 瑜. 声场促进煤层气渗流的应力-温度-渗流压力场的流固动态耦合模型[J]. , 2009, 30(10): 2945 -2949 .
[10] 陶干强，杨仕教，任凤玉. 崩落矿岩散粒体流动性能试验研究[J]. , 2009, 30(10): 2950 -2954 .
版权所有 © 《岩土力学》编辑部
地址：湖北武汉武昌小洪山中国科学院武汉岩土力学研究所(430071)　邮编：200042　电话：027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
本系统由北京玛格泰克科技发展有限公司设计开发