槽腔内岩石破碎介质运动过程的X射线摄影实验研究

掏槽是决定隧道爆破效率的主要因素，掏槽腔内岩石碎块的运动过程是掏槽爆破机理及参数设计的理论基础。岩石属非透明脆性介质，碎块在其内部运动过程的数学模拟和物理模拟都有较大难度。X射线具有较强的穿透能力，有用于观测岩石内部状态瞬时变化的可能性，但还未见用于观测岩体内部碎块抛掷过程的研究报道。利用砂浆水泥试件模型实验和X射线高速摄影研究含空孔直眼掏槽爆破机理，得到岩石碎块在槽腔内部的运动状态，为直眼掏槽爆破机理研究和参数设计奠定了基础，同时，也为岩石类非透明脆性介质内部碎块抛掷之瞬变过程观测开拓了新途径。

TEXTING STUDY ON MOVEMENT PROCESS OF ROCK PIECES IN CUT CAVITY BY X-RAY PHOTOGRAPH

The cut is major factor to affect tunnel blast. The movement process of rock pieces in cut cavity is a theory base for cut blast mechanism and the parameter design. Rocks are non-transparency and brittle. It is difficult to simulate the movement of rock pieces in cut cavity by math and physics. X-ray is of strong penetration ability. It is possible to use high-speed X-ray photograph to survey insitaneous change process in rock body. The mechanism of parallel cut blast with empty holes is studied with model testing and high-speed X-ray photograph. The movement situation of rock pieces in cut cavity is gained. At the same time the study develops a new way to survey the insitaneous change process in rock body and the other non-transparency brittle medium.