Abstract:Using explosive loading, adopting equivalent material simulation test methods, having the aid of digital speckle correlation method(DSCM), the failure law of rock burst roadway is studied under the condition of the different positions of blast holes and explosive loads. Test results show that impact stress wave is mainly in roadway direction and crack, broken or collapsing area are taken place nearby the roof after the explosion. As the explosive loads increasing, the destructive power also amplified, especially for upper rock mass. So the impact energy is the main factors of roadway destruction. It also show that the failure process of rock burst roadway can be divided into three stages of tenso-shear crack, repeat tenso-shear breakage and damage. Among them, when the distance between blast hole and roadway is 450mm, explosive charge is 6.0g, cracks are taken place nearby the roof of roadway, it belongs to the stage of tenso-shear crack. As the distance is 300mm, explosive charge is 6.0g, the crack at tunnel roof is developing, and also partial separation slumping at the top of roadway, this is the stage of repeat tenso-shear breakage. For the distance is 200mm, explosive charge is 8.0g, the roadway is destroyed after the explosion, it is clearly the stage of damage. The simulation test results provide a powerful prediction and prevention for the safety of rock burst roadway.
吕祥锋;潘一山;李忠华;代树红. 冲击波作用下巷道破坏规律相似模拟研究[J]. , 2011, 30(10): 212-215,.
LV Xiang-Feng; PAN Yi-Shan; LI Zhong-Hua; DAI Shu-Hong. Similarity-simulation Study on the failure law of roadway at shock wave. , 2011, 30(10): 212-215,.