论文部分内容阅读
为了揭示近地表倾斜矿体开采过程中地表及覆岩变形破坏机制,以某铜矿一典型地质剖面为原型,运用物理概化模型试验,联合UDEC数值模拟,分析了地表及覆岩变形破坏随不同开采步的变化规律。物理模拟与数值模拟均表明:开采-45 m以上的矿体,覆岩局部扰动,位移小。当开采-75~-45 m之间的矿体,覆岩位移加大,陷落区范围逐渐扩大,岩体出现离层,破坏波及地表。如果对预留矿柱进行开采,覆岩整体崩塌,离层显著,覆岩块体出现错动与转动,破坏直达地表。合理采用概化物理模型试验技术,联合数值模拟,可以既直观又准确地模拟地表及覆岩变形破坏的动态演化过程。
In order to reveal the mechanism of surface and overburden deformation and failure during mining process of near-surface inclined orebody, taking a typical geological section of a copper deposit as a prototype, using physical generalized model test and UDEC numerical simulation, the deformation and failure of the surface and overburden rock Variation of different mining steps. Both physical and numerical simulations show that ore bodies above -45 m in mining time have little disturbance due to local disturbance. When the ore body between -75 ~ -45 m is mined, the displacement of overburden rock increases, the range of the subsidence area gradually expands, and the rock mass separates and destroys the surface. If the reserved pillars are mined, the overlying strata will collapse as a whole, and the strata will be obviously separated. The strata of the strata have been dislocated and turned, destroying the surface directly. Reasonable use of generalized physical model test technology, joint numerical simulation, both intuitive and accurate simulation of surface and overburden deformation and failure of the dynamic evolution process.