• 論文
主辦單位:煤炭科學研究總院有限公司、中國煤炭學會學術期刊工作委員會
冰粒磨料射流冰粒加速規律及破碎煤巖數值模擬
  • Title

    Acceleration of ice particle in the ice abrasive water jet and its rock breaking performance by numerical simulation

  • 作者

    黃飛焦楊洋米建宇李樹清趙志旗劉勇

  • Author

    ?HUANG Fei,JIAO Yangyang,MI Jianyu,LI Shuqing,ZHAO Zhiqi,LIU Yong

  • 單位

    湖南科技大學 南方煤礦瓦斯與頂板災害預防控制安全生產重點實驗室湖南科技大學 資源環境與安全工程學院河南理工大學 河南省瓦斯地質與瓦斯治理重點實驗室———省部共建國家重點實驗室培育基地

  • Organization
    (1.The SAWS Laboratory of Prevention and Controlling the Roof,Coal and Gas Outburst in Coal Mine of South China,Hunan University of Science and Technology,Xiangtan 411201,China;2.School of Resource,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;3.State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Henan Polytechnic University,Jiaozuo 454003,China)
  • 摘要

    為了高效增加煤層透氣性強化煤層瓦斯抽采,首次提出采用冰粒磨料代替傳統磨料的煤層 射流割縫增透新技術,以解決常規磨料射流煤層割縫中出現的堵塞孔隙裂隙等瓦斯滲流通道、增加 孔壁摩擦阻力導致卡鉆抱死等缺陷。 然而,鑒于冰粒磨料與常規磨料的差異性,其加速特性與破碎 煤巖效果尚不清楚。 采用理論推演法研究了冰粒磨料的加速特性和速度分布規律,在此基礎上構 建了數值計算模型分析了射流速度、冰粒體積分數以及圍壓對冰粒磨料射流破碎煤巖效果的影響 規律。 研究結果表明:冰粒磨料摻入高速流體后獲得了先增大后減小加速趨勢,最終其速度可 接近純水的速度,大幅提升了冰粒磨料的沖擊動能,為后續數值模型冰粒速度的賦值提供了依據數值計算結果出現 型破碎形態,同時冰粒磨料在沖擊煤巖前后出現消融現象,符合現有文獻 研究結果和工程實際情況,表明所建數值模型具有適用性;煤巖縱向破碎深度隨冰粒磨料射流 速度的增加而線性增加,橫向破碎寬度隨速度先增加后趨于穩定,煤巖縱向損傷深度約為縱向破碎 深度的 1.13 ;冰粒磨料摻入純水射流后,煤巖的縱向破碎深度和橫向破碎寬度均出現大幅增 加,隨著冰粒磨料體積分數的增加,破碎深度和破碎寬度增加的趨勢變緩,煤巖橫向損傷直徑約為 橫向破碎寬度的 1.3 ;煤巖所受圍壓大幅抑制了其在冰粒磨料射流沖擊下的縱向破碎深度, 圍壓越大,縱向破碎深度越小,而橫向破碎寬度卻幾乎不受圍壓的影響。 研究結果可為冰粒磨料射 流煤層割縫技術的工程應用提供一定的理論支撐,同時可進一步完善高壓磨料射流破巖理論。


  • Abstract


    In order to effectively increase the permeability of coal seams, strengthen the gas drainage of coal seams,

     a new technology of jet slotting coal seam using ice abrasive to replace conventional abrasive is firstly proposed in this paper. This technology may resolve the problems of blocking gas seepage channels such as pores and fissures,and sticking drill due to the increased friction resistance of hole wall,which are encountered in the application of conventional abrasive jet slotting coal seam. However,the acceleration and rock breaking performance of ice abrasive water jet remains unclear due to the discrepancy between ice abrasive and conventional abrasive. Theoretical deduction method was applied to study the acceleration and velocity distribution of ice particles. Then,a numerical model was established to monitor ice abrasive water jet breaking coal rock. It indicated that ① the acceleration of ice particle takes on a first increasing and then decreasing tendency since mixing with highspeed fluid. The final velocity of ice particles can nearly reach the pure water velocity,which can extremely increases the impacting kinetic energy of ice abrasive. This result can provide the velocity value for The numerical model.② The numerical simulation results show that a V shaped coal broken pattern appears and the ice particle melts after impacting on the coal rock. These results meet well with the findings of the previous literatures and the engineering projects,which reflects that the numerical model in this paper is suitable.③ The longitudinal crushing depth of coal rock increases linearly with the jet velocity,while the transverse crushing width takes on a first increase and then flat tendency with the jet velocity. The longitudinal damage depth is approximately 1.13 times of the longitudinal crushing depth.④ The longitudinal crushing depth as well as the transverse crushing width drastically increase ever since the mixing of ice abrasive and the increasing tendency slows down with the increase of ice abrasive concentration. The transverse damage width can reach 1.3 times of the transverse crushing width.⑤ The confining pressure extremely inhibits the longitudinal crushing depth of coal rock under the impact of ice abrasive water jet,whereas the transverse crushing width doesn′t change with the confining pressure. The study results of this paper can provide some theoretical supports for the application of ice abrasive water jet slotting coal seam. In addition,the findings in this paper can improve the theory of abrasive water jet breaking rock. 



  • 關鍵詞

    冰粒磨料煤層割縫加速機理射流破巖損傷

  • KeyWords

    ice abrasive;coal seam slotting;acceleration mechanism;jet breaking rock;damage

  • 引用格式
    黃飛,焦楊洋,米建宇,等.冰粒磨料射流冰粒加速規律及破碎煤巖數值模擬[J].煤炭學報,2022,47(9):3260-3269.
  • Citation
    HUANG Fei,JIAN Yangyang,MI Jianyu,et al.

    Acceleration of ice particle in the ice abrasive water jet and its rockbreaking performance by numerical simulation

    [J].Journal of China Coal Society,2022,47(9):3260-3269.
  • 相關專題
相關問題

主辦單位:煤炭科學研究總院有限公司 中國煤炭學會學術期刊工作委員會

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