为研究采煤机滚筒与围岩的相互作用机制,以MG500/1180-WD型号采煤机为研究对象,采用EDEM离散元仿真软件建立三维仿真模型,综合考虑煤岩块度、顶板压力对采煤机截割性能的影响,研究采煤机截割煤岩的动态过程,利用单因素试验法研究不同截齿安装角对采煤机装煤率、截割阻力以及截割比能耗等因素的影响.结果表明:随着截齿安装角增大,采煤机装煤率呈先增大后减小的趋势,滚筒截割阻力及截割比能耗均呈先减后增的趋势.综合考虑当安装角为450时,采煤机的截割效率最高.研究结果可为采煤机高效截割提供了改进参考方案.%In order to study the interaction mechanism between the cutting drum of the coal shearer and the surrounding rock,based on a MG500/1180-WD mode coal shearer as the study object,the EDEM discrete element simulation software was applied to establish a 3D simulation model.In a comprehensive consideration of the coal and rock lump size and roof pressure affected to the cutting performances of the coal shearer,a study was conducted on the dynamic coal and rock cutting process.A single factor experiment method was applied to study the different installation angle of the cutting picks affected to the coal loading rate of the coal shearer,the cutting resistance,the specific energy consumption of cutting and other factors.The results showed that with the installation angle of the cutting pick increased,the coal loading rate of the coal shearer would be in a tendency with a increasing first and then a decreasing and the cutting resistance of the cutting drum and the specific energy consumption of the cutting would be in a tendency with a decreasing first and then increasing.In a comprehensive consideration,when the installation angle was 45°,the cutting rate of the coal shearer would be the highest.The study results could provide the improved references to the high efficient cutting of the coal shearer.
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