TBM滚刀破岩动态特性与最优刀间距研究.pdf

31 12 Vol.31 No.12 2012 12 Chinese Journal of Rock Mechanics and Engineering Dec. 2012 TBM 12 12 12 1 1 3 (1. 410083 2. 410083 3. 411105) 10 mm 100 mm6 mm 60 mm 2 mm TU 45 A 2012 RESEARCH ON ROCK DYNAMIC FRAGMENTATION CHARACTERISTICS BY TBM CUTTERS AND CUTTER SPACING OPTIMIZATION 12 12 12 1 1 3 TAN Qing YI Nianen XIA Yimin XU Zijun ZHU Yi SONG Junhua (1. School of Mechanical and Electrical Engineering Central South UniversityChangshaHunan 410083China 2. State Key Laboratory of High Performance Complex ManufacturingCentral South UniversityChangshaHunan 410083China 3. School of Mechanical EngineeringXiangtan University Xiangtan Hunan 411105China) Abstract On the basis of reasonably simplified practical tunneling conditionsfrom meso-level structure of rock mass the 2D model of rock chipping process induced by tunnel boring machine(TBM) disc cutters was established using particle discrete element method. The dynamic response mechanism of rock fragmentation induced by two cutters was studied and the relationships of crackspenetration and cutting force of rock mass were obtained. The optimum cutter spacing under common cutting depths was simulatedfrom which the relationship between cutter spacing and specific energy consumption under different cutting depths was analyzed. Thenthe corresponding experiments were carried out to verify the rock dynamic fragmentation characteristics and optimum cutter spacing. Finallythe field TBM pe