Experimental Study on Anti-Shear Properties of Floor Heave Control Anchor of Deep Soft Rock

Abstract:

With the increase of Chinese mining depth, the deformation of deep soft rock is an increasingly serious problem, such as floor heave. The shear experiments of the different types of anchor were carried out. The results show that the anti-shear properties of the seamless anchor are higher than that of the seam anchor. It is significant for the anti-shear properties of anchor filled with different materials, like twisted steel, cement. The shear value of anchor inserted steel is the maximum, grouted one is the next and hollow one is the minimum. After steel installed, the anchor has better shear performance, it not only has greater anti-shear property, but has the secondary supported property because of the double-load peak during shear process. At the same time, the experiments also show that the anchor fixed into the floor in some angle, can effectively control the deformation of the floor heave of deep rock roadway. The studies can offer scientific basis for parameter design optimization of the anchor controlling the deformation of the floor heave.

• Periodical: Advanced Materials Research (Volume 413)
• Pages: 190-194
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.413.190
• Online since: December 2011
• Authors: Kai Hua Zeng, Hai Yan Ju, Chun Guang Wang
• Keywords: Deep Soft Rock, Floor Anchor, Shear Strength, Yield

References

[1] HE Manchao. Conception system and evaluation indexes for deep engineering. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(16)：2 853–2 858.

[2] XIE Heping. Xiangshan Science Conference ed. Foreland and Future of Science(Vol. 6). Beijing: China Environmental Science Press, 2002: 179–191.

[3] STANKUS J C, PENG S S. Floor bolting for control of mine floor heave. Mining Engineering, 1994, 46(9): 1099–1102.

[4] YANG Shengbin, HE Manchao, LIU Wentao, etal. Mechanics and application research on the floor anchor to control the floor heave of deep soft rock roadway. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(sup. 1) : 2913-2920.

DOI: 10.1201/b17617-144

[5] Rong Guan, Zhu Huanchun, Zhou Chuangbing. Testing study on working mechanism of fully grouted bolts of thread steel and smooth steel. Chinese Journal of Rock Mechanics and Engineering. 2004, 23(3)：469-475.

[6] Indraratna B, Aziz NI, Dey A. Behaviour of joints containing clay infill under constant normal stiffness, with and without bolting. Proc Inst Civil Eng-Geotech Eng 2001, (149): 259-267.

DOI: 10.1680/geng.149.4.259.48657

[7] SONG Zhifei, XU Bo, SHI Huiqi. The interfac ia lmechan ica l character istics in anchorage zone of grouted bolts. Journal of China Coal Society, 2008, 33(9)：988-981.

[8] G. Grasselli. 3D Behavior of bolted rock joints: experimental and numerical study. International Journal of Rock Mechanics & Mining Sciences, 2005, (42)：13-24.

DOI: 10.1016/j.ijrmms.2004.06.003

[9] GU Lei-yu1, XU Jing-mao, GU Xin. et al. Effect of Geometric wave shape of anchor cable borehole wall on its bearing capacity. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(20): 3771–3776.

[10] C. Li, B. Stillborg. Analytical models for rock bolts. International Journal of Rock mechanics and Mining Science, 1999, (36): 1013-1029.

DOI: 10.1016/s1365-1609(99)00064-7

[11] Yue Cai, Tetsuro Esaki, Yujing Jiang. Arock bolt and rock mass Interaction model. International Journal of Rock Mechanics & Mining Science, 2004, (41)：1055-1067.

DOI: 10.1016/j.ijrmms.2004.04.005