Mining of Mineral Deposits

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Studies of New, Nonadhesive Anchoring

I. Sakhno1, S. Sakhno1, D. Kurdiumow2, I. Shvets1

1Donetsk National Technical University, Pokrovsk, Ukraine

2Company of Mining and High-Altitude Work “AMC”, Wieliczka, Poland

Min. miner. depos. 2018, 12(2):85-94

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      Purpose is to develop anchoring with nonadhesive high-strength roof bolting in terms of large pre-destructive deformations and its testing under laboratory conditions.

      Methods. Laboratory studies of hydration hardening of self-extending mixtures, carried out with the use of digital microscope Bresser LCD 40-1600x, have determined the features of hydration of the modified mixtures. The developed mixture, testing by means of unevenly-component three-axial pressure (UCTAP), has determined its strength within post-hydration period, elasticity module, and deformation module. Bench tests concerning anchor fastening by means of self-expending mixtures as well as anchor glue Cement KL have helped perform comparative analysis of adhesive technique to hold anchors fixed and nonadhesive one. Underground on-site research to fasten anchors while Franciszek Karol chamber strengthening in the context of Wieliczka mine made it possible to determine dynamics of anchor loading.

      Findings. It has been grounded experimentally that adding of Sika BV 3M ingredient to self-extending mixture results in up to 30% intensification of its strength limit on uniaxial compression. It has also been grounded experimentally that maximum effort to fasten anchor bolts by means of self-extending mixtures, excesses efforts for those bolts fastened with the help of resins more than twice. Analysis of operation mode of such anchors means that the action of anchor – fastener – rock system is close to that by modern energy absorbing bolts.

      Originality. A new concept of anchor fixation at the expense of their fastening by means of self-extending mixtures throughout the hole length has been formulated. During the hardening process, 30 – 50 MPa pressure is developed making it possible to intensify maximum fastening effort being more than two times higher to compare with adhesive technique. Moreover, constant resistance is provided in the process of the anchor bolts displacement within a hole; the resistance is similar to that provided by adhesive technique.

      Practical implications. The obtained results, having sufficient practical accuracy, can be used for the development of new anchoring in the context of large deformations of a stope boundary. If the parameters are substantiated theoretically and bench testing is passed, the proposed anchoring technique can be implemented in the stopes of coal mines, ore mines as well as nonmetallic ones. That favours the increase in load bearing capacity of the anchorage and rock support in terms of their elastic deformation.

      Keywords: anchor, anchor fixation, adhesion, rocks, stress


Ghadimi, M., Shahriar, K., & Jalalifar, H. (2015). A New Analytical Solution for the Displacement of Fully Grouted Rock Bolt in Rock Joints and Experimental and Numerical Verifications. Tunnelling and Underground Space Technology, (50), 143-151.

Ghadimi, M. (2017). Effect of Profile Bolt in Bond Strength Fully Grouted Rock Bolts Using Analytical and Experimental Methods. International Journal of Mining and Mineral Engineering, 8(2), 156-168.

He, M., Gong, W., Wang, J., Qi, P., Tao, Z., Du, S., & Peng, Y. (2014). Development of a Novel Energy-Absorbing Bolt with Extraordinarily Large Elongation and Constant Resistance. International Journal of Rock Mechanics and Mining Sciences, (67), 29-42.

Kılıc, A., Yasar, E., & Celik, A. (2002). Effect of Grout Properties on the Pull-Out Load Capacity of Fully Grouted Rock Bolt. Tunnelling and Underground Space Technology, 17(4), 355-362.

Korzeniowski, W., Skrzypkowski, K., & Zagórski, K. (2017). Reinforcement of Underground Excavation with Expansion Shell Rock Bolt Equipped with Deformable Component. Studia Geotechnica et Mechanica, 39(1), 39-52.

Kovalevska, I., Barabash, M., & Gusiev, O. (2016). Research into Stress-Strain State of Reinforced Marginal Massif of Extraction Mine Working by Combined Anchoring System. Mining of Mineral Deposits, 10(1), 31-36.

Levei, E., Frentiu, T., Ponta, M., Tanaselia, C., & Borodi, G. (2013). Characterization and Assessment of Potential Environmental Risk of Tailings Stored in Seven Impoundments in the Aries River Basin, Western Romania. Chemistry Central Journal, 7(1), 5-18.

Li, C.C. (2012). Performance of D-Bolts Under Static Loading. Rock Mechanics and Rock Engineering, 45(2), 183-192.

Li, C.C., Stjern, G., & Myrvang, A. (2014). A Review on the Performance of Conventional and Energy-Absorbing Rock-Bolts. Journal of Rock Mechanics and Geotechnical Engineering, 6(4), 315-327.

Pruška, J. (2017). Modelling Rock Mass Improvement Using Rock Bolts. Acta Polytechnica CTU Proceedings, (10), 43-47.

Pytlik, A. (2013). Research on Cement and Mineral Grout Type TSM 70, TSM 70F and TSM 70K with High Strength and Adhesion. In Gas Hazards in Hard Coal Mines – Prevention, Fighting, Modeling, Monitoring (eds. Janusza Cygankiewicz, J. & Prusek, S.). Katowice: Central Mining Institute.

Pytlik, A. (2016). A Methodology for Laboratory Testing of Rockbolts Used in Underground Mines Under Dynamic Loading Conditions. Journal of the Southern African Institute of Mining and Metallurgy, 116(7), 1101-1110.

Sakhno, I.G., & Molodetsky, A.V. (2013). Laboratory Studies of the Dynamics of Growth of Self-Expansion Pressure of Non-Explosive Destructive Mixture in Typical Deformation Modes. Ground Control in Mining, (20-21), 3-17.

Sakhno, S.V., Isayenkov, O.O., Lyashok, Ya.O., & Sakhno, І.G. (2017). Self-Expanding Non-Explosive Mixture. Patent No.119161, Ukraine.

Wen, Z.J. (2010). Study of Stress Features of Fully Grouted Prestressed Anchors. Rock and Soil Mechanics, (31), 177-181.

Wen, Z.J, Jiang, Yu.J., Han, Z.H., Yang, S., & Wang, X. (2016). Anchoring Principles of a New Energy-Absorbing Expan-dable Rock Bolt. Engineering Transactions, 64(1), 89-103.

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