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基于爆破相似理论建立含软弱夹层顺层岩体边坡爆破的力学模型,并介绍模型爆破层裂试验和剪切试验的设计思路及试验方法。以某石灰石矿采场黏土质夹层物为软弱夹层原料,通过相似模型试验研究爆破作用下含软弱夹层岩体边坡的层裂特性及稳定性。试验结果表明,爆破后可将软弱夹层分为爆腔区、压密区、影响区和无扰动区;爆腔区、压密区和影响区构成模型层裂区;爆前模型抗滑稳定安全系数最大、爆后次之、爆破过程中最小;层裂范围直接影响模型抗滑稳定安全系数。软弱夹层厚度对模型的层裂范围和抗滑稳定安全系数有较大影响。
Based on the theory of blasting similarity, a mechanical model of slope blasting in bedding rock mass with soft interlayer is established, and the design method and experimental method of model blasting layer failure test and shear test are introduced. A similar model test was conducted to study the delamination characteristics and stability of the rock mass containing weak intercalations under the action of blasting with a clay interlayer of a limestone mine stope as a weak interlayer material. The experimental results show that the soft interlayer can be divided into the explosive cavity, the compacting area, the influence area and the non-disturbance area after blasting; the explosive cavity, the compacting area and the influence area form the model layer rift; the former model is stable against skidding The coefficient is the largest, the second is blasting, and the smallest is in the blasting process. The range of delamination directly affects the stability coefficient of sliding stability of the model. The thickness of the weak interlayer has a great influence on the range of the model and the safety factor of anti-slide stability.