Conical pick is a rock cutting tool that is commonly used in roadway driving. Pick wear frequently happens in the course of breaking hard rock. The current paper shows a new method to solve the problem of pick wear. The rock is preslit with the saw blade and then broken by the conical pick. In order to study the cutting force and features of rock fragment, the numerical model is built between rock plate and conical pick. And element erosion is added in the code to obtain the fracture result. The rock plate cutting testbed is made to testify the correctness of numerical simulation. The width, height, and thickness of the rock plate, as well as cutting angle and cutting position, which influence cutting force and rock fracture are studied. According to the results, there exist exponential relationships between cutting force and width and thickness of rock plate. In addition, a linear relationship is found between the cutting force and the height of rock plate. Furthermore, both the cutting angle and cutting depth have an influence on cutting force. In particular, the factors of thickness and height or rock plate have the most obvious influence on cutting force. It is proven that what is beneficial to rock fracture is higher height and lower thickness of rock plate.

中文翻译：

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一侧固定，三侧自由的岩盘切割与压裂数值模拟

圆锥形镐是一种通常在巷道行驶中使用的凿岩工具。在破碎坚硬岩石的过程中经常发生镐头磨损。当前的论文展示了一种解决截齿磨损问题的新方法。岩石用锯片预切开，然后用圆锥形镐破碎。为了研究岩石碎屑的切削力和特征，在岩盘与圆锥镐之间建立了数值模型。并在代码中添加元素侵蚀以获得断裂结果。制作岩盘切割试验台以验证数值模拟的正确性。研究了岩石板的宽度，高度和厚度，以及影响切削力和岩石破裂的切削角度和切削位置。根据结果​​，切削力与岩石板的宽度和厚度之间存在指数关系。另外，在切削力和岩石板的高度之间发现线性关系。此外，切削角度和切削深度都对切削力有影响。特别是，厚度和高度或岩石板的因素对切削力的影响最明显。事实证明，有利于岩石破裂的是较高的高度和较低的岩石板厚度。