基于EDEM仿真的煤岩截割产尘规律研究  

Mechanism of dust production during coal and rock cutting based on EDEM

作　　者：王磊 程煜 徐荣萧 WANG Lei;CHENG Yu;XU Rongxiao(Wudong Coal Mine,National Energy Group Xinjiang Energy Co.,Ltd.,Urumqi 830000,China;School of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]国家能源集团新疆能源有限责任公司乌东煤矿,新疆鲁乌鲁木齐830000 [2]山东科技大学安全与环境工程学院,山东青岛266590

出　　处：《煤矿安全》2023年第1期22-28,共7页Safety in Coal Mines

摘　　要：为了分析煤岩掘进机截割产尘规律,基于EDEM仿真法构建掘进工作面煤岩体三轴受力模型,分析不同截割条件下煤岩截割产尘规律。结果表明:颗粒间黏结键数量随截割头运转时间呈周期性递减趋势,其周期长度范围为0.2~0.7 s,颗粒间破坏键数量随截割时间大致呈线性递增趋势;截割过程中岩体和煤体的颗粒平均抛掷速度随截割深度增加均呈周期性波动分布,且岩体截割过程的颗粒平均抛掷速度值明显较大;截割深度随着截割头运转时间的增加逐渐增加,颗粒抛掷平均速度自1.0 s左右呈波动性增加趋势;不同顶板压力条件下,随着截割深度的增加,颗粒平均速度均呈周期性增加趋势,而截煤岩高度对截割产尘过程的影响较小。In order to analyze the mechanism of cutting and dust production of coal and rock driving machine, the three axis force model of coal and rock was constructed based on EDEM method, and the coal dust cutting mechanism under different cutting conditions was analyzed. The results show that the number of bonds between particles decreased periodically with the operation time of the cutting head, the cycle length is in the range of 0.2 s to 0.7 s, and the number of broken bonds between particles increases linearly with the cutting time;the average body mass and throwing velocity of particles in the process of coal cutting with cutting depth showed a distribution of cyclical fluctuations, in addition, the average particle throwing velocity of rock mass cutting is obviously larger;the cutting depth increased gradually with the increase of cutting head operating time and the average velocity of particle throwing shows an increasing trend of fluctuation from about 1.0 s;with the increase of cutting depth, the average speed of the particles increased periodically under different roof pressure conditions, and the height of cut coal has little influence on the dust generation process.

关 键 词：掘进工作面 截割产尘 EDEM 粉尘污染 模拟仿真 产尘规律 粉尘防治 

分 类 号：TD714[矿业工程—矿井通风与安全]