摘要
为了实现对固体密实充填开采地表沉陷进行科学地预计,需要根据其覆岩结构形态演化规律和岩层移动特征建立完备的沉陷预计模型及其参数体系。相似材料模拟和钻孔窥视表明,固体密实充填开采覆岩形态以完整层状结构的弯曲带为主,覆岩仅在近顶板附近发育一定高度的断裂带,不发生垮落现象。岩层移动特征类似纵向载荷作用下层合板的弯曲变形,通过力学简化,基于层合板理论建立了固体密实充填开采地表沉陷预计模型。研究表明,固体密实充填开采地表沉陷形态仍可用概率积分模型进行描述,并进一步探讨了基于"等价釆高"的固体密实充填开采地表沉陷预计模型参数体系。最后将本文建立的地表沉陷预计模型应用于某工程实例,取得了良好的效果。
In order to achieve predicting the surface subsidence caused by solid compacted backfilling mining scientifically, it is necessary to establish the completed prediction model and its parameter system according to the evolvement rule of the structure form and movement characteristics of overburden rock. By means of similar material simulation and borehole peep, it is shown that overburden rock of mining with solid compacted backfilling is given priority to sagging zone, which appears complete layer structure, only develops some height of the fault zone near the roof strata, but not caving. The strata movement characteristic is similar to bending deformation of the laminated plates under the longitudinal loading, after a simplified mechanics. Based on the theory of laminated plates, surface subsidence prediction model of mining with solid compacted backfilling is established. It is shown that surface subsidence form of mining with solid compacted backfilling is still suitably described with probability integral model;and further discuss on parameters system of the surface subsidence prediction mode based on“equivalent mining thick”theory is carried out. Finally, the surface subsidence prediction model is applied to a real project, which obtains a good effect.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2014年第7期1973-1978,共6页
Rock and Soil Mechanics
基金
国家科技支撑计划资助项目(No.2012BAB13B03)
国家自然科学基金资助项目(No.41104011)
国土环境与灾害监测国家测绘局重点实验室开放基金资助项目(No.LEDM2011B08)
安徽理工大学博士基金(No.11096)
关键词
固体密实充填采煤
岩层移动控制
地表沉陷预计
coal mining with solid compacted backfilling
strata movement control
surface subsidence prediction
