In order to improve the rock-breaking efficiency in hard rock formations, this paper presents an impregnated diamond bit with a special matrix structure. The grid-shaped matrix is designed to achieve large volume breakage so that the rock breaking efficiency can be greatly improved. The calculated specific pressure on the bottom surface lip of the newly proposed bit increased by 67%, from 68 kgf/cm² to 113 kgf/cm², compared to the conventional impregnated diamond bit. In such case, the grid piece can be effectively pressed into rocks to produce more cracks to effectively break them. In this paper, to study the rock-breaking mechanism of this impregnated diamond bit with grid-shaped matrix (IDBGM), subjected to different grid spacing and rock properties, rock cutting tests were conducted by using a TXCB-5P precision microtome and two 3D-printed grid pieces. The results indicate that the optimum grid spacing is 2 mm, because of the largest-scale cuttings when breaking rock ridges produced by the proposed bit. And the mineral particle size is the dominant factor affecting the height of weakened layer of rock. Besides, the IDBGM can more fully exert its structural advantages when applied to the hard rock layer with larger particle size. At the same time, the monitored real-time electric current is consistent with the above results, and further reveals the rock breaking mechanism characteristic of the IDBGM.

为了提高硬岩层的破岩效率，本文提出了一种具有特殊基质结构的浸渍金刚石钻头。格状矩阵的设计可实现大体积破碎，从而可以大大提高破碎效率。新建议的钻头底唇上的计算比重增加了67％，从68 kgf / cm ²增至113 kgf / cm ²，与传统的浸渍金刚石钻头相比。在这种情况下，可以将格栅片有效地压入岩石中以产生更多的裂缝以有效地将其破碎。本文针对具有不同网格间距和岩石特性的这种带有网格状基质（IDBGM）的浸渍金刚石钻头的破岩机理，使用TXCB-5P精密切片机和两个3D切片机进行了岩石切割测试。印刷的网格碎片。结果表明，最佳的网格间距为2 mm，这是由于在打破建议的钻头产生的岩石脊时最大的切割尺寸。矿物粒度是影响岩石弱化层高度的主要因素。此外，IDBGM应用于较大粒径的硬岩层时，可以更充分地发挥其结构优势。与此同时，