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滚压破岩为冲击压碎和剪切碾碎的复合过程。表征其破碎效果的参量是侵入深度h和岩石自然破碎角φ。h取决于外载荷和岩石坚固性,在一定的载荷条件下,h虽能表示破坏岩石的难易程度,但不充分,因为塑性岩石h可能很大,但破碎下来的岩体并不多。φ则是较单纯的量,它与载荷和压头的几何形状无关,而与岩石性质和自由面条件(数目和形状)有关,可用它表征岩石的可破坏性。本文在讨论滚压破岩中,以φ为基本参量,以试验数据为基础,建立了抛物线破碎面积和体积模型,从力平衡和能量守恒定律出发,分析了滚压破岩各参量之间的关系,确定载荷与各参量之间的函数形式。
Rolling rock breaking is a composite process of impact crushing and shear milling. The parameters characterizing its crushing effect are the invasion depth h and the natural fracture angle φ of the rock. h depends on the external load and rock solidity. Under certain load conditions, h can represent the degree of difficulty in destroying the rock, but it is not sufficient, because the plastic rock h may be large, but not much rock mass is broken down. φ is a simpler quantity that is independent of the geometry of the load and indenter, but is related to rock properties and free surface conditions (number and shape) and can be used to characterize the rock’s destructibility. This paper discusses rolling-breaking rock, using φ as the basic parameter, and based on the experimental data, establishes the parabolic crushing area and volume model. Starting from the law of force balance and energy conservation, this paper analyzes the parameters between rolling and rock breaking parameters. Relationships determine the functional form between the load and each parameter.