岩层运动并行计算系统StrataKing及应用

为了克服国外串行商业软件的功能有限、计算规模小和计算效率低的问题，历时10余年，自主研发了拉格朗日元与离散元耦合的岩层运动GPU并行计算系统StrataKing。介绍了Strata-King的计算流程、基本原理和功能，各计算模块均在GPU上执行。通过模拟三点弯梁的开裂过程，检验了StrataKing的正确性。在静水压力条件下，当单元数目较多时，巷道围岩的裂纹以更加弯曲、柔美而非突兀、生硬状向围岩深部发展，这与塑性力学中圆环形的各处均破坏的塑性区有所不同。在采动条件下，工作面煤壁超前支承压力和水平应力均具有峰值，后者与岩层之间的黏结作用有关，这与基于连续介质假定的厚壁筒径向应力特征有所不同。由此，StrataKing的大规模计算能力、丰富的功能和行业鲜明特色得到了进一步呈现。

Parallel Computing System of Strata Motion (StrataKing) and Its Applications

Foreign various commercial serial softwares possess some disadvantages, such as the limited applicability, small-scale computing capacity and low efficiency. To overcome these disadvantages, we developed StrataKing (a GPU parallel computing system of strata motion) based on the hybrid Lagrangian-discrete element method in the past more than ten years. In this paper, the flow chart, basic principle and main features were introduced. Each computing modules were executed on GPU. The validation of StrataKing was conducted by modeling the cracking process of the three-point bending beam. Under the hydrostatic pressure, for finer meshes, cracks in the vicinity of the tunnel are more curved and gentle, extending toward the depth. The phenomenon is different from of the ring plastic zone in which failure occurs everywhere in plastic mechanics. During excavation, the peaks of the abutment and horizontal pressures were presented. The latter is related to the cohesion between strata, which is different from the radical stress of the thick-wall tube based on the continuous assumption. Thus, the large-scale computing capacity, wide applicability and apparent mining characteristics of StrataKing were further demonstrated.