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Computational simulation of frictional drill-bit movement in cemented granular materials

机译:胶结颗粒材料中摩擦钻头运动的计算模拟

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The main purpose of this paper is to simulate computationally the kinematical motion of the frictional drill-bit of an automatic mining machine in the underground consisting of cemented granular materials. Although the finite element method has become a powerful tool for the design and analysis of many kinds of engineering products, it cannot be used, both effectively and efficiently, for dealing with the frictional drill-bit design problem that involves discrete-mechanics characteristics in nature. Thus, the particle simulation method is employed for mimicking the kinematical motion of a frictional drill-bit, which is fundamental to the design of an automatic mining machine in cemented granular materials. In order to simulate the driving force mechanism of a frictional drill-bit, both the designed velocity and the actual velocity concepts of the frictional drill-bit are proposed. This enables the particle simulation method to be used as a potential tool for the design of an automatic mining machine, which can be used as a new mining technology in some particular mining environments. To illustrate the usefulness and applicability of the proposed driving mechanism associated with the particle simulation method, it has been used for mimicking the frictional drill-bit movement of an automatic mining machine in cemented granular materials under several working conditions. The related computational simulation results have demonstrated that (1) the particle simulation method, together with the proposed driving mechanism of a frictional drill-bit, can provide a useful tool for the design of an automatic mining machine and (2) the vibrating frequency of a frictional drill-bit may have considerable effects on the motion of the frictional drill-bit in the underground consisting of cemented granular materials.
机译:本文的主要目的是通过计算机模拟一台自动采矿机的摩擦钻头在由水泥颗粒材料组成的地下的运动运动。尽管有限元方法已成为设计和分析多种工程产品的有力工具,但它不能有效有效地用于解决涉及离散机械特性的摩擦钻头设计问题。因此,采用了粒子模拟方法来模拟摩擦钻头的运动,这对于胶结颗粒材料中自动采矿机的设计至关重要。为了模拟摩擦钻头的驱动力机理,提出了摩擦钻头的设计速度和实际速度概念。这使粒子模拟方法可用作设计自动采矿机的潜在工具,该自动采矿机可以在某些特定的采矿环境中用作新的采矿技术。为了说明所提出的与粒子模拟方法相关的驱动机构的实用性和适用性,已将其用于模拟自动采矿机在几种工作条件下在水泥颗粒物料中的摩擦钻头运动。相关的计算仿真结果表明:(1)颗粒仿真方法,结合提出的摩擦钻头驱动机制,可为自动采矿机的设计提供有用的工具;(2)振动频率的提供。摩擦钻头可能会对由水泥颗粒材料组成的地下摩擦钻头的运动产生重大影响。

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