Numerical simulation of conical pick cutting coal and rock process based on ABAQUS

摘要

Aimed at investigating efficient cutting method with a lower energy consumption, higher reliability and life, and researching the intrinsic relationships between ability of picks' breaking coal rock and related factors, this paper simulates the dynamic process of conical pick cutting coal rock by using ABAQUS/explicit, analyzes cutting load statistics, and evaluates the similarity of simulation results and test results quantitatively using Pearson correlation coefficient. The results indicate that the simulation results are in good agreement with the test and the theoretical results (the error is within 10%), the description of the variation law and influence degree of the cutting force, propelling and lateral force along with the pick cone angle and installation angle, the average gradient of three force variation, the ratio range of propelling force to cutting force(0.18～0.34) and variation tendency along with the installation angle and the cone angle. Positive or negative alternating direction of lateral force proves that cutting slots on both sides of coal rock existing non-simultaneous avalanche phenomenon in cutting process. The study provides the reference for the simulation of pick cutting and cutting mechanism broking coal and rock under considering the anisotropy of coal rock and beddings and joints.