开采沉陷非线性动态力学预测理论及应用研究

The relation between the stress and strain of cracked rockmass are given by analysing mechanics characteristic of cracked rockmass which are gained by experiment and field measure . Based on the deep research on the relation between strata movement and characteristic of cracked rockmass, the relation between mining subsidence and deformation modulus of cracked rockmass, strata press and length of working face are set up .The strata movement falls into four phases. Different mechanics models are used to simulate the strata movement in different phases. The differential equations are derived for strata movement models in different phases. The boundary conditions of each model and exchange conditions between different models are put forward. The visual computing program is developed to compute movement of strata and surface, position f bed separation, caving height of mined rockmass and caving step length of roof. The model has been proved by the comparison with the field data.

开采沉陷是非常复杂的动态时空过程，传统的静态力学方法无法体现这一复杂的动态力学问题。本项目从采动破裂岩体的本构关系研究入手，建立连续介质与非连续介质的耦合关系捎弥鸩阒鸫渭扑惴椒ǎ⒉啥姨宥ρＰ停垢媚Ｐ湍芡奔扑憧沙料荨⒏惭业钠屏迅叨取⒗氩闶笨辗⒂恢玫龋越⑷碌牟啥姨逡贫苹翟げ饫砺