冲击诱导损伤岩石的侵入特性
发布时间：2019-06-27 11:48
【摘要】：在硬岩矿山开采中,为了提高大孔径深孔凿岩效率,降低钻具磨损,提出了冲击诱导切削复合凿岩新工艺.在Walsh模型的基础上,建立了冲击诱导孔周围损伤岩石的裂纹模型,推导了岩石损伤区的牙轮钻齿侵入系数方程及侵入阻力方程.分析了裂纹密度、扰动频率分别对岩石弹性模量、岩石破碎体积和钻齿侵入阻力的影响.结果表明:随裂纹密度的增大,岩石的有效弹性模量减小;相同侵入载荷下,随着扰动频率的增加,钻齿的侵深和岩石破碎体积不断增加;随着冲击扰动频率的增大,牙轮钻齿侵入阻力逐渐减小.
[Abstract]:In that production of hard rock mine, in order to improve the drilling efficiency of the large-diameter deep hole and reduce the wear of the drilling tool, a new technology of impact-induced cutting composite rock drilling is put forward. On the basis of the Walsh model, the crack model of the damaged rock around the impact-inducing hole is established, and the invasion coefficient equation and the invasion resistance equation of the rock bit in the rock damage area are derived. The influence of the crack density and the disturbance frequency on the rock's modulus, the rock breaking volume and the penetration resistance of the drilling teeth were analyzed. The results show that with the increase of the crack density, the effective elastic modulus of the rock is reduced; under the same intrusion load, with the increase of the disturbance frequency, the penetration depth of the drilling teeth and the rock breaking volume are increasing; with the increase of the impact disturbance frequency, the penetration resistance of the rock bit is gradually reduced.
【作者单位】： 中南大学机电工程学院;
【基金】：国家自然科学基金资助项目(51175518) 高性能复杂制造国家重点实验室资助项目(zzyjkt2015-03)
【分类号】：TD313
，
本文编号：2506760
[Abstract]:In that production of hard rock mine, in order to improve the drilling efficiency of the large-diameter deep hole and reduce the wear of the drilling tool, a new technology of impact-induced cutting composite rock drilling is put forward. On the basis of the Walsh model, the crack model of the damaged rock around the impact-inducing hole is established, and the invasion coefficient equation and the invasion resistance equation of the rock bit in the rock damage area are derived. The influence of the crack density and the disturbance frequency on the rock's modulus, the rock breaking volume and the penetration resistance of the drilling teeth were analyzed. The results show that with the increase of the crack density, the effective elastic modulus of the rock is reduced; under the same intrusion load, with the increase of the disturbance frequency, the penetration depth of the drilling teeth and the rock breaking volume are increasing; with the increase of the impact disturbance frequency, the penetration resistance of the rock bit is gradually reduced.
【作者单位】： 中南大学机电工程学院;
【基金】：国家自然科学基金资助项目(51175518) 高性能复杂制造国家重点实验室资助项目(zzyjkt2015-03)
【分类号】：TD313
，
本文编号：2506760
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