中文摘要：

采用离散元软件PFC2D建立了结构面抗剪强度试验模型和截齿侵入模型,从结构面间距、结构面倾角和结构面抗剪强度3方面研究结构面特征对镐型截齿侵入破岩过程的影响。模拟过程记录了侵入力、碎屑体积、裂纹类型、数量和方向等信息,从微观角度解释了结构面特征对裂纹扩展的影响规律。模拟结果发现结构面对岩石裂纹扩展具有阻隔和导向作用,有利于裂纹扩展并形成岩屑;侵入过程首先形成拉裂纹为主的压碎区,无结构面时裂纹以拉破坏向深部扩展,而有结构面时裂纹以剪切破坏形式沿结构面扩展;随结构面间距、结构面倾角的增大,碎屑的形成和裂纹扩展所需侵入力随之增大,而结构面强度对碎屑形成和裂纹扩展方向影响较小,仅影响裂纹沿结构面扩展深度。

英文摘要：

Test model of structural plane shearing strength and cutting pick invasion model were built by discrete element software PFC-（2D）,then the influence that structural plane characters to pickaxe type cutting pick invasion process were studied from the following three aspects,structural plane interval,incline angle and shearing strength. And some information as invasion force,fragment volume,fracture type,number and orientation were recorded during simulation process,the influence law of structural plane characters to fracture development was illustrated from micro perspective,rock fractures development were obstructed and guidance by structural plane,and it was benefit for fracture development and formed chippings,crushed zone firstly appeared during invasion process,its main fractures were tension fractures,fractures developed as tension broken type in deep without structural plane,but fractures developed as shearing broken type under structural plane developed,the invasion force of chippings formed and fractures development increased with structural plane interval,incline angle increased,but structural strength has less influence to chippings formed and fractures developed direction,only influenced fractures developed depth along structural plane.