应用相似材料模拟实验研究了盐腔成腔过程中上覆岩层移动、变形和破坏规律,上覆岩层损伤演化过程及规律,上覆岩层的层面效应及分层特性,上覆岩层破碎岩体尺寸特性等内容。通过这些研究,获得了上覆岩层在盐腔形成过程中的损伤演化方程、上覆岩层因岩层性质不同而产生的分层特性、上覆岩层移动变形过程中表现出来的层面效应以及岩层破碎岩体尺寸与岩层力学性质的关系。为进一步弄清开采沉陷的微观机理和建立新的预测模型打下了基础。
The movement, distorton and breaking rules of overburden, the evolution of damage in overburden, the bedding influence and the size characteristics of broken rock were studied by model tests. The evolution equation of damage in overburden was obtained. The bedding had greateffect on the subsidence. Because of the sandwich of terranes, it was different when overburden was distorted. The size of broken terrane was related to the rock strength. The scope of influence could be determined from mechanical parameters of terrane, and it was the basis for finding the micro-mechanism and the new predicting model of mining subsidence.