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高阶段空场嗣后充填采矿法一般为两步骤回采,一步矿房回采结束后进行胶结充填,为二步矿房回采提供安全可靠的作业环境.在二步矿房回采过程中,一步胶结充填体受二步松散充填体(尾砂)的压力,很大程度上影响了一步胶结充填体的稳定性.因此,在设计胶结充填体所需强度时,应定量计算二步尾砂充填体对一步胶结充填体的侧向压力,为胶结充填体的强度设计提供理论依据.论文从莫尔-库伦准则和极限平衡法两个方面分别建立了尾砂侧向压力的力学模型,并推导出了计算尾砂侧向压力的理论公式.并通过实验分析了理论计算值与实测值之间的差距,确定了两个理论模型的适用性.
High-stage empty field subsequent filling mining method is generally two-step mining, one-step mining after cementation cementation filling for two-step mining recovery to provide a safe and reliable working environment in the second-step mining recovery process, one-step cemented filling body By the pressure of two-step loose packing body (tailing sand), the stability of the one-step cemented packing body is greatly influenced.Therefore, in the design of the required strength of the cemented filling body, the two-step tailing sand filling body should be quantitatively calculated in one step The lateral pressure of the cemented filling body provides the theoretical basis for the strength design of the cemented filling body.This paper establishes the mechanical model of the lateral pressure of the tailings from the Mohr-Coulomb criterion and the limit equilibrium method, The theoretical formula of the lateral pressure of the tailings sand was obtained, and the gap between the theoretical calculated value and the measured value was analyzed experimentally to confirm the applicability of the two theoretical models.