摘要：发展了一种新的用于模拟胶体运动的 M onte Carlo方法，综合 cluster moving 技术、粒子簇生长以及粒子沉降模拟方法于一个统一的模型中，首先对胶体体系中粒子的聚集行为进行模拟，在此基础上引入重力因素，考察中间体系的聚沉行为，并进一步扩展到水煤浆粗分散体系，分别从粒子簇、粒径以及粒子密度3个方面考察了超声辐照对水煤浆体系稳定性的影响规律，初步阐明了这些因素影响水煤浆稳定性的内在原因。

关键词：超声辐照；水煤浆；稳定性；M onte Carlo 模拟

Abstract：A new M onte Carlo approach （ M CA ） is developed for the simulation of colloid particlesʾsubsidence simulation method are synthesized as one unite model．Based on the simulation of the particlesʾaggregation in colloid system，gravity factor is introduced into M CA to investigate the aggregation and subsidence of intermediate system，and then those of coarse distribution system such as w ater-coal slurry is studied at three aspects of particle size，cluster size and particle density，the essence of these parametres on the stability of w ater-coal slurry is initially clarified．

Key words：ultrasonic radiation；w ater-coal slurry；stability；M onte Carlo simulation