Abstract
The mechanical behavior of the lateral pressure coefficient (LPC) of the axial stress of the anchor rod is an important factor in roadway bolt support, especially in deep mining, where the variation of the LPC is larger. In this paper, an innovative mechanical model of bolt pulling is proposed in which the influence of the LPC is considered. When the LPC is changed, the variation of the axial force along the anchor rod body is expressed by the interface normal stress of the anchoring system. In addition, a full-scale test model with a 1:1 similarity ratio was developed in the laboratory and the influence of the LPC on the deformation and stress of the anchor rod under vertical and horizontal pressure was studied by using a 2.5-m fiber Bragg grating (FBG) force-measuring anchor rod. The results demonstrate that the axial force of the bolt shows the same increasing trend under various LPC values. The theoretical solution of the bolt axial force variation value accords with the experimental data. The theoretical calculation method can effectively predict the variation distribution of the bolt axial force under various LPC changes. Increasing the LPC of the surrounding rock can effectively reduce the axial force and the deformation of the bolt under the same pulling force. The support effect of the bolt can be improved by increasing the pressure of the anchor hole and increasing the interface friction coefficient between the anchoring agent and the surrounding rock during the construction of the bolt support.
Similar content being viewed by others
References
Amenzade YA (1979) Theory of elasticity.
An T, Zheng X, Zhu D, Qian D, Guo Y, Cao J (2019) Experimental investigation of pretensioned bolts under cyclic loading: damage assessment using acoustic emission. Int J Distrib Sens N 15:812337703. https://doi.org/10.1177/1550147719849354
Benmokrane B, Chennouf A, Mitri HS (1995) Laboratory evaluation of cement-based grouts and grouted rock anchors. International Journal of Rock Mechanics & Mining Science & Geomechanics Abstracts 32:633–642
Benmokrane B, Xu H, Bellavance E (1996) Bond strength of cement grouted glass fibre reinforced plastic (GFRP) anchor bolts. International Journal of Rock Mechanics & Mining Sciences & Geomechanics Abstracts 33:455–465
Chang JC, Xie GX (2012) Research on response characteristics of bolt pretension on supporting effect of rock roadway in coal mine. Journal of Mining & Safety Engineering 29:657–661
Chen C, Ren T, Zhang Y, Lei Z, Wang F (2016) Experimental investigation of the effect of grout with additive in improving ground support. International Journal of Rock Mechanics & Mining Sciences 85:52–59
Chen J, Hagan PC, Saydam S (2017) Sample diameter effect on bonding capacity of fully grouted cable bolts. Tunnelling & Underground Space Technology 68:238–243
Çolak A (2001) Parametric study of factors affecting the pull-out strength of steel rods bonded into precast concrete panels. International Journal of Adhesion & Adhesives 21:487–493
Forbes B, Vlachopoulos N, Hyett AJ, Diederichs MS (2017) A new optical sensing technique for monitoring shear of rock bolts. Tunnelling & Underground Space Technology 66:34–46
Hyett AJ, Forbes B, Spearing S (2013) Enlightening bolts: using distributed optical sensing to measure the strain profile along fully grouted rock bolts Vol.,
Kang H (2016) Sixty years development and prospects of rock bolting technology for underground coal mine roadways in China Journal of China University of Mining & Technology
KILIC, YASAR, CELIK AG (2002) Effect of grout properties on the pull-out load capacity of fully grouted rock bolt. Tunnelling & Underground Space Technology Incorporating Trenchless Technology Research 17:355–362
Liu J, Chai J, Wei S (2006) Study on rock deformation monitoring using fiber Bragg grating in simulation experiment. Acta coal: English version 12(2):30–33
Ma S, Nemcik J, Aziz N (2013) An analytical model of fully grouted rock bolts subjected to tensile load. Construction & Building Materials 49:519–526
Schroeck M, Ecke W, Graupner A (2000) Strain monitoring in steel rock bolts using FBG sensor arrays. Proceedings of SPIE - the International Society for Optical Engineering 4074:298–304
Serbousek MO, Signer SP (1987) Linear load-transfer mechanics of fully grouted roof bolts. Report of Investigations/1987 Coal Mines
Spearing AJS, Hyett AJ, Kostecki T, Gadde M (2013) New technology for measuring the in situ performance of rock bolts. Int J Rock Mech Min 57:153–166. https://doi.org/10.1016/j.ijrmms.2012.07.027
Steblay BJ (1987) New instrumentation for roof bolt load measurement. Ieee T Ind Appl ia-23:731–735
Tang Y, Wu Z (2016) Distributed long-gauge optical fiber sensors based self-sensing frp bar for concrete structure sensors-Basel. 16:286. https://doi.org/10.3390/s16030286
Vaculik J, Sturm A, Visintin P, Griffith M (2018) Modelling FRP-to-substrate joints using the bilinear bond-slip rule with allowance for friction - full-range analytical solutions for long and short bonded lengths
Xue Z, Wu Z, Zheng J, Yu H, Li Q (2014) Experimental study on bond behavior of deformed bars embedded in concrete subjected to biaxial lateral tensile compressive stresses. J Mater Civil Eng 26:761–772
Yazici S, Kaiser PK (1992) Bond strength of grouted cable bolts. Int.j.of Rock Mech.min.sci. & Geomech 29:279–292
Zhang B, Benmokrane B (2002) Pullout bond properties of fiber-reinforced polymer tendons to grout. J Mater Civil Eng 14:399–408
Zhang J, Liu L, Shao J, Li Q (2019) Mechanical properties and application of right-hand rolling-thread steel bolt in deep and high-stress roadway metals-Basel. 9:346. https://doi.org/10.3390/met9030346
Zhao MH, Liu JJ, Luo H, Yang MH (2017) Experimental studies of shear strength characteristics and influencing factors of soil-rock aggregate mixture. Rock & Soil Mechanics 38:965–972
Zhilun X (1990) Elastic mechanics Third edition of volume two:1-97
Funding
This work is supported by the National Natural Science Foundation of China (Nos. 51774009, 51074163).
Author information
Authors and Affiliations
Contributions
Tuo Wang and Jucai Chang conceived and established the experimental system; Zhiqiang Yin and GongPeng guided thesis writing; Wenbao Shi and Ning Li analyzed the data; Tuo Wang wrote the paper.
Corresponding author
Ethics declarations
Conflict of interest
The authors declare that they have no conflict of interest.
Additional information
Responsible Editor: Zeynal Abiddin Erguler
Rights and permissions
About this article
Cite this article
Wang, T., Chang, J., Yin, Z. et al. Theory and full-scale simulation testing of the mechanical properties of anchors under a variable lateral pressure coefficient. Arab J Geosci 14, 136 (2021). https://doi.org/10.1007/s12517-020-06419-y
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s12517-020-06419-y