Study on Support of Roadways in Fractured Rock Mass under Mining-Induced Stresses

Abstract:

One of the difficult issues in underground mining is the ground control of roadway subject to mining induced stresses. As a longwall face advances, the state of initial stresses dramatically changes. Accordingly, lateral abutment pressure forms on the pillar and frontal abutment pressure on the roof and lateral sides of the roadway. These pressures will lead to severe deformation and deterioration of the rock mass surrounding the entries. In this paper, a systemic study on this issue is proposed using the combination of numerical modeling and in-situ monitoring which was carried out at a coal mine in the Lu.An Group, China. The condition of stress redistribution caused by mining-induced stresses and the state of the surrounding rock mass of the roadway situated in front the work face are systematically investigated. Different patterns of support and reinforcement as well as their effects on the stability of the roadway are also presented.

• Periodical: Advanced Materials Research (Volumes 807-809)
• Pages: 2332-2339
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.807-809.2332
• Online since: September 2013
• Authors: Qiang Wang, Jin Yu Chen
• Keywords: FLAC-3D, Mining-Induced Stress, State of Surrounding Rock Mass, Stress Distribution, Supporting Structure Coupling

References

[1] KONGYi-fan, JI Yang-rui. Applied research on bolt and grouting re inforced technology for mine dynamic pressurized roadway[ J ]. Coal Science and Technology, 2006, 34, (8) (In Chinese).

[2] ZHANG Nong, HOU Chao-jong，CHEN-Qingmin. Mechanical Property Tests of Grouting Reinforced Bodies of Surrounding Rock of Roadway[ J ], Journal of Liaoning Technical University, 1998(2). (In Chinese).

[3] Chen X X. Research on the key technology and design theory of the new type of monolayer freezing shaft lining [Ph.D. dissertation]. Xuzhou: China University of Mining& Technology, 2005. (In Chinese).

[4] LI Xue-hua，WANG Wei-jun，HOU Chao-jong. Controlling floor heave with strengthening roof in gateway by numerical analysis[ J ]. Journal of China University of Mining &Technology, 2003(4）. (In Chinese).

[5] WANG Mingyang，ZHOU Zeping ，QIAN Qihu. Tectonic ， deformation and failure problems of deep rock mass[J]. Chinese Journal of Rock Mechanics and Engineering, 2006，25(3)：448–455. (in Chinese).

[6] Pai F J. the construction experience and lesson of freezing shaft lining[C]/Wang C S. The freezing engineering technology and application of stratum: The collected papers of chinese stratum freezing project 40 year. Beijing: China Coal Industry Publishing House, 1995, (10): 23-30. (In Chinese).

[7] FANG Zulie. Support principles for roadway in soft rock and its controlling measures[C]/ HE Manchao ed. Soft Rock Tunnel Support in Chinese Mines：Theory and Practice. Beijing：China Coal Industry Publishing House，1996：64–70. (in Chinese).

[8] HE Yongnian，HAN Lijun，SHAO Peng，et al. Some problems of rock mechanics for roadways stability in depth[J]. Journal of China University of Mining and Technology，2006，35(3)：288–296. (in Chinese).

[9] QIAN Qihu. The characteristic scientific phenomena of engineering response to deep rock mass and the implication of deepness[J]. Chinese Journal of Rock Mechanics and Engineering，2004，27(1)：1–5. (in Chinese).

[10] TANG Xin， PAN Yishan，ZHANG Mengtao. Mechanism analysis of zonal disintegration in deep level tunnel[J]. Journal of Geological Hazards and Environment Preservation，2006，17(4)：80–84. (in Chinese).

[11] LI Yingjie， AN Yishan，LI Zhonghua. Analysis of mechanism of zonal disintegration of rocks[J]. Chinese Journal of Geotechnical Engineering，2006，28(9)：1 124–1 128. (in Chinese).

[12] GU Jincai, GU Leiyu, CHEN Anmin, et al. Model test study on mechanism of layered fracture within surrounding rock of tunnels in deep stratum[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(3)：433–438. (in Chinese).

[13] Wang Y S，Huang J H，Yang W H, Ren Y L, Song L. Temperature measurement of outer shaft wall during freezing sinking in deep alluvium. Journal of China University of Mining& Technology, 2006, 35(4）: 468-472. (In Chinese).

[14] Xiang M, Yang C J. Study on the hydro-thermal dissipation law of high strength concrete, Concrete , 2003(3): 27-43. (In Chinese).

[15] Wang Y S, Yang W H, Ren Y L. Numerical back analysis and simulation of temperature field for shaft sinking with artificial ground freezing method [J]. Journal of China University of Mining& Technology, 2005, 34(5): 626-629. (In Chinese).

[16] Wang Y S, Li B S, Zhang K S, Song L, Ren Y L. Numerical Simulation About Temperature Field of Outer Shaft Lining During Freezing Sinking[J]. Journal of Mining & Safety Engineering. 2007, 24(3): 316-320(In Chinese).

[17] Yu J, Zhu P H, Jiang C R. Discuss about The Hydro-thermal Dissipation Law of Mass Concrete in High-rise Construction Foundation[J]. Overseas Building Materials Science and Technology, 2004, 3(25): 75-76. (In Chinese).

[18] Zhou W Q. The fundamental research on temperature field and stress field of Mass concrete[D]. Liaoning: Liaoning Technical University, 2002. (In Chinese).

[19] Ye L C, Shen Y. Mass concrete construction[M]. Beijing: China Building Industry Press, 1987. (In Chinese).

[20] The National Standards of the People's Republic of China. The Structure Project construction and approval standard of concrete(GB50204-2002). Beijing: China Building Industry Press, 2002. (In Chinese).

[21] Gu D Z, Liu S Z. The destruction and prevention of outer freezing shaft lining during construction[J]. Mine Construction Technology, 1997, 18(1): 6-9. (In Chinese).

[22] Li D, Pan Y G. Law and velocity of hydro-thermo dissipation in the calculation of concrete transient temperature field [J]. Journal of Xi'an University of Architecture & Technology, 1999, 31(3): 277-279. (In Chinese).