Cutting Roof Roadway Regional Stress Characteristics Numerical Analysis of Thin Coal Seam Group

Abstract:

The stress state characteristic of the cutting roof roadway region was simulated and analyzed by FLAC3D. The results showed that the low side of return airway and gas roadway had higher vertical stress while the horizontal stress concentration was obviously in floor and low side of the return airway, the stress of cutting roof roadway was obviously, thus the level of rock burst hazard increased. range of stress concentration are 5~10m when using cutting roof roadway, thus distance between two cutting roof roadway are no less than 20m, to avoid stress concentration regions by two adjacent cutting roof roadway superposition.

• Periodical: Applied Mechanics and Materials (Volumes 522-524)
• Pages: 1382-1385
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.522-524.1382
• Online since: February 2014
• Authors: Zhen Wen Liu, Tao Qin
• Keywords: Cutting Roof Roadway, Numerical Simulation, Thin Coal Seam

References

[1] QI Qingxin，MAO Debing，WANG Yongxiu，et al. Study on the mechanism and control approaches of mining geodynamic calamities[J]. Geology and Prospecting，2003，39(Supp. 1：94–97.

[2] Dou lin-ming, He Ye, Zhang Wei-dong. Hazards of rock burst in island coal face and its control[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(11): 1866-1869.

[3] PANYishan, LIZhonghua, ZHANGMengtao. Distribution, type, mechanism and prevention of rock burst in China[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(11)：1 844–1 851.

[4] Qian M inggao, M iao Xiexing, Xu J ialin. Theoretical study of key stratum in ground control[J]. Journal of China Coal Socie2ty, 1996, 21(3): 225-230.

[5] Qian Minggao, Liu tingcheng. Mining pressure and control[M]. Beijing: Coal industry press, (1991).

[6] Chen yanguang, Qing minggao. Surrounding rock control in coal face in china[M]. Xuzhou: china university of mining and technology press, (1994).