综采工作面呼吸性粉尘浓度分布规律及其与湍流强度关系的研究  

Numerical simulation study on distribution law of respirable dust concentration and its relationship with turbulence intensity in fully mechanized mining face

作　　者：向晓刚 孙少伟 赵美成 邓小良[1] 李鹏[4] 徐锐 安世岗 江丙友[6] 祝文军[1,5] 余国锋 任波 梁羽翔 XIANG Xiaogang;SUN Shaowei;ZHAO Meicheng;DENG Xiaoliang;LI Peng;XU Rui;AN Shigang;JIANG Bingyou;ZHU Wenjun;YU Guofeng;REN Bo;LIANG Yuxiang(Key Laboratory of Shock Wave and Detonation Physics,Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,China;College of Physics,Sichuan University,Chengdu 610065,China;School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Shenhua Shendong Coal Group Technology Research Institute,Shenmu 719315,China;ANNUAL Ventilating Equipment Co.,Ltd,Pingxiang 337000,China;Anhui University of Science&Technology,Huainan 232001,China;Coal Mining National Engineering Technology Research Institute,Huainan 232001,China;Guangdong HERE Environment Technology Co.,Ltd.,Foshan 528000,China)

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理重点实验室,四川绵阳621900 [2]四川大学物理学院,四川成都610065 [3]西安交通大学能源与动力工程学院,陕西西安710049 [4]神华神东煤炭集团技术研究院,陕西神木719315 [5]江西安源通风设备有限公司,江西萍乡337000 [6]安徽理工大学,安徽淮南232001 [7]煤炭开采国家工程技术研究院,安徽淮南232001 [8]广东贺尔环境技术有限公司,广东佛山528000

出　　处：《煤矿安全》2021年第4期13-19,共7页Safety in Coal Mines

基　　金：中国神华能源股份有限公司科技创新项目及重点基础研究发展计划资助项目(SHGF-16-14);国家重点研发计划资助项目(2017YFC0805202);江西省"双千计划"工业粉尘治理创新团队资助项目(S2018CXTD1051)。

摘　　要：利用流体动力学软件FLUENT,采用离散相与连续相双向耦合的方法对神东哈拉沟煤矿22410综采工作面的呼吸性粉尘的浓度分布及运动规律进行了3D数值模拟。结果表明:割煤机产生的呼吸性粉尘浓度峰值逐渐由靠近煤层侧向液压支柱侧偏移,导致液压支柱侧的粉尘浓度增加;同时发现割煤机侧的呼吸性粉尘粒径越小越容易扩散到液压支柱侧;对呼吸性粉尘的浓度分布与湍流强度的关系分析后发现,综采面巷道中的流场湍流强度呈准周期性、强弱交替变化,割煤机侧与液压支柱侧湍流强度刚好互补;在割煤机侧,呼吸性粉尘浓度越大,湍流强度相对越小,风速相对较大;在液压支柱侧,湍流强度越大,粉尘浓度越大,与割煤机侧相反。By using the fluid dynamics software FLUENT,the 3 D numerical simulations of the concentration distribution and motion law of the respirable dust in 22410 fully mechanized mining face of Shendong Halagou Coal Mine were carried out by the two-phase coupling method of discrete phase and continuous phase.The results show that the peak value of the respirable dust concentration generated by the coal cutter is gradually shifted from the lateral coal seam side to the hydraulic prop side,resulting in an increase in the dust concentration on the hydraulic prop side.Meanwhile,it is found that the smaller the particle size of the respirable dust on the coal cutter side,the easier it is to diffuse to the hydraulic prop side.After analyzing the relationship between the concentration distribution of respirable dust and the turbulence intensity,it is found that the turbulence intensity of the flow field in the roadway of the fully mechanized mining face is quasi-periodic,alternating strong and weak,and the turbulence intensity of the coal cutter side and the hydraulic prop side is just complementary.On the side of the coal cutter,the greater the concentration of respirable dust,the smaller the turbulence intensity and the relatively higher wind speed.On the hydraulic prop side,the greater the turbulence intensity,the greater the dust concentration,as opposed to the coal cutter side.

关 键 词：综采工作面 CFD模拟 呼吸性粉尘 浓度分布 湍流强度 

分 类 号：TD712[矿业工程—矿井通风与安全]