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DESIGNING AND MINING-CONSTRUCTIONS WORK
ArticleName Improvement of load-bearing capacity of arched support using rolled steel reinforcement in mines
DOI 10.17580/gzh.2021.05.05
ArticleAuthor Baikenzhin M. A., Asanova Zh. M.
ArticleAuthorData

Mineral Mining Department, Karaganda Technical University, Karaganda, Kazakhstan:
M. A. Baikenzhin, Associate Professor, Candidate of Engineering Sciences
Zh. M. Asanova, Doctoral Candidate, Zhanar-a@bk.ru

Abstract

The economic efficiency of coal mining at the reduced cost is directly related with maintenance of operation conditions in temporary roadways. This article proposes a method of increasing the loadbearing capacity of the three-link arched support made of a special rolled profile (SRP) by increasing the stiffness moments of arched support sections subjected to the greatest bending moments. It is determined to be necessary to install the same size SPR in the support sections exposed to the greatest bending moments. Mathematical modeling of the reinforcement shows that the sufficient length of SRP segments is 30 cm. The calculations show that SRP 27 is replaceable by SRP 17 with the same size inserts, which allows saving of 10 kg of steel per each meter of the arched support. The proposed method of increasing the load-bearing capacity of the support will reduce the specific content of steel in the mine support manufacture and, thereby, will enable significant saving of material and labor resources. The studies conducted to substantiate the proposed solution include: determination of bending moments and normal forces in the three-link steel arched support by the computer-aided procedure of VNIMI (All Union Research Institute of Mining Geomechanics and Mine Surveying) for the specific existing conditions, with the subsequent choice of the required size of the support; stress–strain analysis of rock mass and mine support in ANSYS environment; economic calculation of the proposed solution effectiveness. The implemented researches give grounds to believe that the proposed variant of increasing the loadbearing capacity of the support made of the rolled steel profile can significantly improve stability of mine roadways. It is possible to strengthen the support without reducing the metal content in cases of expected deformation of the support under the influence of the confining pressure, when the other methods of maintenance-free support in roadways are ineffective or require a lot of time, materials and labor.

keywords Roadway, pressure, arched support, steel, deformation, resistance, moment, special interchangeable profile
References

1. Baklashov I. V., Kartoziya B. A. Mechanics of underground structures and mine supports : Textbook. 3rd ed. Moscow : Student, 2012. 543 p.
2. Guidance on design of underground digging and lining calculation. Moscow : Stroyizdat, 1983. 272 p.
3. Kartoziya B. A., Borisov V. N. Engineering problems in underground structure mechanics : Educational aid. Moscow : Izdatelstvo MGGU, 2001. 246 p.
4. Nurguzhin M. R., Danenova G. T. Engineering calculations in ANSYS : Collection of examples. Karaganda : Izdatelstvo KarGTU, 2006. 319 p.
5. Zong Yijiang, Han Lijun, Wei Jianjun, Wen Shengyong. Mechanical and damage evolution properties of sandstone under triaxial compression. International Journal of Mining Science and Technology. 2016. Vol. 26, Iss. 4. pp. 601–607.
6. Sytnik A. A., Zigel F. S., Kompanets V. F., Polyakovskiy V. S. Mine arched support: Review and references. Donetsk, 1992. 36 p.
7. Kasparyan E. V., Kozyrev A. A., Iofis M. A., Makarov A. B., Kulikova E. Yu. Geomechanics : Textbook. Mur mansk : MGTU, 2016. Part I. 272 p.
8. Bieniawski Z. T. Rock mechanics design in mining and tunneling. Rotterdam : A.A. Balkema, 1984. 272 p.
9. Kurlenya M. V., Baryshnikov V. D., Gakhova L. N. Experimental and analytical method for assessing stability of stopes. Journal of Mining Science. 2012. Vol. 48, Iss. 4. pp. 609–615.
10. Masaev Yu. A., Masaev V. Yu., Filina L. D. New developments in the field of bolting and increase of stability of rock outcrops in mines. Vestnik Kuzbasskogo gosudarstvennogo tekhnicheskogo universiteta. 2015. No. 1(107). pp. 41–44.
11. Hoek E., Brown E. T. Empirical Strength Criterion for Rock Masses. Journal of the Geotechnical Engineering Division. 1990. Vol. 106. pp. 1013–1035.
12. Kalmykov V. N., Latkin V. V., Zubkov A. A., Neygomonov S. S., Volkov P. V. The feature of construction increased combined fix on underground mines. GIAB. 2015. Iss. 3. Conditions of stable functioning of mineral-resource complex of Russia. Special issue 15. pp. 63–69.
13. Hoek E., Brown E. T. Practical estimates of rock mass strength. International Journal of Rock Mechanics and Mining Science. 1997. Vol. 34, No. 8. pp. 1165–1186.
14. Baykenzhin M. A., Manasbaeva A. K. Geodynamic stability of underground excavations. Internauka. 2017. No. 6-1(10). pp. 62–64.
15. Hongpu Kang. Support technologies for deep and complex roadways in underground coal mines: a review. International Journal of Coal Science & Technology. 2014. Vol. 1, Iss. 3. pp. 261–277.
16. Shaohui Wang, Wei Zhou, Qingxiang Cai, Xuyang Shi, Xiang Lu, Boyu Luan. The Coal Mining Model Under Slippery Slope in Yiminhe Open Pit Coal Mines. Geotechnical and Geological Engineering. 2019. Vol. 37, Iss. 5. pp. 3727–3737.
17. Demin V. F., Mausymbaeva A. D. Basis for mining practice: Textbook. Karaganda : KarGTU, 2018. 295 p.
18. Hao Wu, Kulatilake P. H. S. W., Guoyan Zhao, Weizhang Liang, Enjie Wang. A comprehensive study of fracture evolution of brittle rock containing an inverted U-shaped cavity under uniaxial compression. Computers and Geotechnics. 2019. Vol. 116. 103219. DOI: 10.1016/j.compgeo.2019.103219
19. Songfeng Guo, Shengwen Qi, Yu Zou, Bowen Zheng. Numerical Studies on the Failure Process of Heterogeneous Brittle Rocks or Rock-Like Materials under Uniaxial Compression. Materials. 2017. Vol. 10, Iss. 4. 378. DOI: 10.3390/ma10040378
20. Louchnikov V. N., Eremenko V. A., Sandy M. P., Bucher R. Underground excavation support in deformable and rockburst-hazardous rock mass conditions. Gornyi Zhurnal. 2014. No. 4. pp. 37–43.
21. Seryakov V. M. Calculation of rock mass stresses considering rock mass–support interaction in mines. Journal of Mining Science. 2016. Vol. 52, Iss. 5. pp. 851–856.
22. Protosenya A. G., Nguen N. B. The forecast of stress state of massif at the area of mine shaft and gallery junction. Izvestiya vuzov. Gornyi zhurnal. 2015. No. 7. pp. 50–55.
23. Demin V. F. Geomechanical control in underground mining : Educational aid. Almaty : SSK, 2018. 272 p.

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