复杂空区群回采围岩破坏模式及区域并行研究

Parallel computing technologies for the failure mode and area of surrounding rock in complex goafs

为研究红岭铅锌矿大规模回采过程中围岩顶板的破坏模式及区域,分析承压矿柱以及围岩的应力演化规律,明确空区群的力学状态以及稳定性。建立大尺度复杂空区群三维力学计算模型,应用大规模并行计算技术,对中段回采中围岩矿柱破坏模式及应力演化规律进行了研究。结果表明:顶板在不同矿体厚度区域,会产生"<"型剪切破坏、发散型破坏、X状共轭剪切破坏以及单斜面剪切破坏等不同破坏形式;回采后产生9个主要承压矿柱、4个次要承压矿柱;中段回采,会对上一中段产生明显应力扰动,原有破坏扩展,并产生新的破坏,但隔段回采,不会对最上中段产生应力影响。

In order to study the failure mode and area in surrounding rock in large-scale mining in Hongling lead zinc ore, the stress evolution rule in surrounding rock and support pillars was analyzed, and the mechanical state and stability of the complex goals were made clear. A large three-dimensional mechanical calculation model was built, the large-scale parallel computing technique was applied, and the failure mode and stress evolution rule of surrounding rock and pillars during open stoping mining were probed into. Research has shown that in the roof of ore body with different thickness, different type of failure mode are formed such as ＂〈＂ type shear failure, divergence form failure, X type conju- gate shear failure, and single bevel shear failure; after backstopping, 9 main support pillars and 4 sec- ondary support pillars come into being; backstopping causes obvious stress perturbation and damage extention as well as new destruction in previous upper middle, but the interchanging mining will not cause stress perturbation in the top upper middle above.