【作者】 王汉鹏；

【导师】 高延法；

【作者基本信息】 山东科技大学 ， 采矿工程， 2004， 硕士

【摘要】 本文分析了高地应力非均质软岩的基本工程地质特征；应用ANSYS结构分析软件数值仿真分析了高地应力非均质软岩洞室群的应力场与变形：进行了破裂岩石的注浆加固试验；提出了高地应力非均质软岩洞室群的支护方案。 采用三维有限元数值仿真方法，结合唐山矿-950m水泵房洞室群现场实际情况，进行了高地应力非均质软岩洞室群开挖以及在不同支护情况下洞室围岩应力分布和位移规律研究，模拟了洞室群开挖以及支护引起的围岩收敛变形移动。 软岩洞室群的破坏是一个动态问题，因此本文提出了扰动蠕变的概念。扰动蠕变就是处在岩石强度破坏临域之内的围岩在非恒定(扰动)荷载的作用下的蠕变现象。论述了地下工程围岩发生扰动蠕变的条件，在自重应力、地下水、爆破震动和时空效应的作用下将会产生扰动蠕变。 分析了高地应力非均质软岩洞室群围岩收敛变形破坏的原因，并且探讨了高地应力非均质软岩的支护原则。在破裂岩石残余强度和变形性能研究的基础上，进一步开展其注浆固结体的力学性能试验研究。试验证实注浆固结后破裂岩块残余强度有不同程度的提高，同时提高了破裂岩块的塑性变形性能，并在较大变形范围内保持稳定的承载能力。进一步揭示固结块体的变形协调性能及巷道围岩注浆加固机理。在全面论证高地应力软岩巷道锚注加固原理和锚注施工工艺的基础上，针对唐山矿—950m水平水泵房洞室群具体的地质条件，运用锚注联合支护技术，成功解决了洞室群开挖支护的稳定性和维护问题。并通过相似地质条件下的对比试验(普通锚喷加固)，证明了软岩条件下使用锚注联合加固技术无论是技术还是经济上都是非常合理的。更多还原

【Abstract】 The basic engineering geological characteristics is analysed and the engineering classification of high geo-stress nonuniform soft rock is discussed; the stress and deformation of high geo-stress nonuniform soft rock cavern group is numerical simulated by using structure software ANSYS; grouting reinforcement of broken rock is tested; the support scheme of high geo-stress nonuniform soft rock cavern group is proposed.Recording to Tangshan mine -950m pump chamber, the high geo-stress nonuniform soft rock stress and displacement distribution in wall rock when opening and with different support is researched by using 3-demision FEM.The failure of soft rock chamber is a dynamic problem. The new concept "disturbance creep" is proposed in the paper. Disturbance creep is creep under disturbance load in failure field of rock. Discuss the condition of disturbance creep occurred in wall rock underground.The failure and deformation reason of wall rock in high geo-stress nonuniform soft rock cavern group is analysised and the support principle of high geo-stress soft rock is proposed. This paper begins with a study of the deformation characteristics and the residual strength of broken rock, which is followed by a research of broken rock after grouting reinforcement. Testing results show that grouting can enhance the residual strength of broken rock, and improve the compatibility of lateral and vertical deformations. So the grouting rockmass can keep the steady supporting capacity in a relatively large deformation range. It is helpful for explaining the mechanism of the deformation control in roadway by grouting reinforcement in surrounding rock. On the base of principle of grouting bolt support and its technology, the stability and maintenance of cavern group is resolved by using grouting bolt united support according to Tangshan mine -950m pump chamber. With contrast experiment under the same geological condition, using grouting bolt united support under condition of soft rock is reasonable technically and economically.更多还原