Study on Zoning of Overburden Strata and Roadway Deformation of Ascending Mining in Thin Coal Seam

Abstract:

In order to solve the problems appeared in mining process of upper seam in Xiaohezui coal mine, a technical scheme of ascending mining was put forward. UDEC, a discrete element numerical simulation soft was used to study the characteristics of zoning of overburden strata and the rule of vertical stress distribution of the upper coal, the results show that the upper coal is on the top of the equilibrium belt without step dislocation, the structure of roof stratum and floor stratum stay complete with slight separations, so ascending mining is feasible; the range of the upper coal influenced by the stoping of below working face is -85m~65m, the vertical stress reaches a maximum 15m ahead the below working face, and reaches a minimum behind it 25m. It is applied in the engineering practice, the roadway deformation discipline of the upper coal is similar to the distribution rule of vertical stress, provides a theoretical basis for guiding and improving the roadway support of ascending mining.

• Periodical: Advanced Materials Research (Volumes 616-618)
• Pages: 505-509
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.616-618.505
• Online since: December 2012
• Authors: Jian Xin Tang, Ya Lin Li, Ya Jie Jia, Le Le Sun
• Keywords: Ascending Mining, Numerical Simulation, Roof Roadway, Thin Coal Seam, Zoning of Overburden Strata

References

[1] Jiping Du, Liquan Wang. Special mining method of coal mine. Xuzhou: China University of Mining and Technology Press, 2011. (In Chinese)

[2] Yongqi Xu. Coal mining learning. Xuzhou: China University of Mining and Technology Press, 2004. (In Chinese)

[3] Liqiang MA, Liquan Wang, Jingli Qiao, et al. Journal of Mining & Safety Engineering. 2008, 25 (3): 357-360. (In Chinese)

[4] Biming Shi, Zegong Liu. Journal of China Coal Society, 2008, 33(1): 17-22. (In Chinese)

[5] Guorui Feng, Jing Zheng, Yafeng Ren, et al. Journal of China Coal Society, 2010, 35(11): 1 863－1 867. (In Chinese)

[6] Guorui Feng, Yonggan Yan, Shuangsuo Yang. et al. Journal of China Coal Society, 2009, 34 (8): 1 032－1 036. (In Chinese)

[7] Yongkui Shi, Ji Mo. Journal of Mining & Safety Engineering. 2007, 24 (4): 473－47. (In Chinese)

[8] Jinquan Jiang, Chunjiang Sun, Zengde Yin, et al. Journal of China Coal Society, 2004, 29 (1): 1－6. (In Chinese)