Distribution of Impact Pressure on Hole Wall in Deep-Hole Blasting with Multi-Stage Axial Air Deck
LOU Xiaoming1,2, TANG Zhiheng1,2, NIU Mingyuan3, LIN Rizong3, ZENG Lingfeng3
1.Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, Fujian, China;
2.Institute of Explosion Technology, Fuzhou University, Fuzhou 350108, Fujian, China;
3.Zijin Mining Construction Co Ltd, Xiamen 361026, Fujian, China
Abstract：In order to determine the reasonable air-deck length in underground vertical deep-hole blasting, the internal distribution function of impact pressure on hole wall with different air-deck length in multi-stage air deck blasting was analyzed based on the detonation wave theory. According to the Mises criterion, the reasonable reference values of air-deck length were obtained for different kinds of rock, which was verified by numerical simulation and on-site blasting test. The results show that the impact pressure on the hole wall of the air deck drops abruptly from both sides to the center along the axis of the hole, but increases slightly around the midpoint, and the pressure distribution presents a symmetrical W-shaped curve, with much higher values on two sides, lower in the middle section, and slightly higher around the center.
楼晓明, 唐志恒, 牛明远, 林日宗, 曾令峰. 深孔轴向多段间隔装药孔壁冲击压力分布[J]. 矿冶工程, 2024, 44(1): 6-11.
LOU Xiaoming, TANG Zhiheng, NIU Mingyuan, LIN Rizong, ZENG Lingfeng. Distribution of Impact Pressure on Hole Wall in Deep-Hole Blasting with Multi-Stage Axial Air Deck. Mining and Metallurgical Engineering, 2024, 44(1): 6-11.
[1] WANG Gang, WANG Jingtao, LIU Kaixin. New numerical algorithms in SUPER CE/SE and their applications in explosion mechanics[J]. Science China Physics, Mechanics and Astronomy, 2010,53(2):237-243.
[2] TAN Sirui, WANG Cheng, SHU Chiwang, et al. Efficient implementation of high order inverse Lax-Wendroff boundary treatment for conservation laws[J]. Journal of Computational Physics, 2011,231(6):2510-2527.
[3] 杨国梁,杨仁树,姜琳琳. 轴向间隔装药爆破沿炮孔的压力分布[J].爆炸与冲击, 2012,32(6):653-657.
[4] LOU Xiaoming, ZHOU Ping, YU Jin, et al. Analysis on the impact pressure on blast hole wall with radial air-decked charge based on shock tube theory[J]. Soil Dynamics and Earthquake Engineering, 2020,128(C):105905.
[5] Jhanwar J C. Theory and Practice of Air-Deck Blasting in Mines and Surface Excavations: A Review[J]. Geotechnical and Geological Engineering, 2011,29(5):651-663.
[6] WU Liang, YU Dongxiao, DUAN Weidong, et al. Rock Failure Mechanism of Air-Decked Smooth Blasting under Soft Interlayer[J]. Advanced Materials Research, 2011,402:617-621.
[7] 陈 明,刘 涛,叶志伟,等. 轮廓爆破孔壁压力峰值计算方法[J].爆炸与冲击, 2019,39(6):103-112.
[8] 王文龙. 钻眼爆破[M]. 北京:煤炭工业出版社, 1984.
[9] 李维新. 一维不定常流与冲击波[M]. 北京:国防工业出版社, 2003.
[10] Henrych J. 爆炸动力学及其应用[M]. 熊建国 译. 北京:科学出版社, 1987.
[11] 汪旭光. 爆破设计与施工[M]. 北京:冶金工业出版社, 2012.
[12] 楼晓明,王振昌,陈必港,等. 空气间隔装药孔壁初始冲击压力分析[J]. 煤炭学报, 2017,42(11):2875-2884.
2024, Vol. 44 
