Optimization on cut-hole of mining tunnel excavation

• Published in: Mining science and technology (China) Vol. 19; no. 1; pp. 70 - 73
• Main Authors: ZHOU, Chuan-bo, WANG, peng, LEI, Yong-jian, YIN, Xiao-peng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2009
• Subjects: cut-hole optimization; mining tunnel excavation; numerical simulation; spot experiment; 巷道采矿; 开采技术; 数值模拟; 钻孔掏槽; mining tunnel excavation; cut-hole optimization; spot experiment; numerical simulation
• ISSN: 1674-5264; 2212-6066
• DOI: 10.1016/S1674-5264(09)60013-2

The efficiency of excavation a mining tunnel is definitely linked with modes of cut-holes. According to experience and methods of engineering analogy, the double-wedge cut, the 9-hole cut and the single spiral cut were determined originally by considering the production conditions and blasting environment of the mining tunnels of the -74 m horizontal in the Da-ye iron mine. Based on acquired modes of cut-holes, the effect of the cut was studied, on the one hand, by a numerical simulation method with the aid of LS-DYNA3D, a nonlinear dynamic finite element program; on the other hand, a spot experiment was carried out in the mining tunnels. Both the numerical simulation and the spot experiment demonstrated and agreed that a single spiral cut provides the optimum excavation effect.