Study on the Influencing Law of Rock-Breaking Efficiency in Granite Formations Based on PFC3D

本文通过PFC3D离散元软件建立了三维双滚刀破岩模型，根据室内试验结果验证模型的准确性，并对不同围压、刀间距、贯入度和温度条件下花岗岩地层破岩效率开展了研究。结果表明，相同温度条件下，围压和刀间距对破岩效率有着抑制作用；随着贯入深度增加，刀具与岩石接触更加充分，同时岩层温度上升，破岩效率会逐渐提升。This study established a three-dimensional dual-disc cutter rock-breaking model using PFC3D discrete element software, validated the model’s accuracy based on laboratory test results, and investigated the rock-breaking efficiency of granite formations under different confining pressures, cutter spacing, penetration depths, and temperature conditions. The results indicate that under the same temperature conditions, confining pressure and cutter spacing have a suppressive effect on rock-breaking efficiency; as penetration depth increases, the contact between the cutter and the rock becomes more sufficient, and with the rise in rock layer temperature, the rock-breaking efficiency gradually increases.