Study on Abutment Pressure Distribution Law of Fully-Mechanized Sublevel Caving Face in Extra-Thickness

Abstract:

Based on field observation, analogy simulation and theoretical analysis, the abutment pressure distribution law of fully-mechanized sublevel caving face with extra-thickness was studied. The results showed that: Different instability type of the structure ‘Combined cantilever beam-articulated rock beam’ in fully-mechanized sublevel caving roof led to cyclical changes of abutment pressure; with an invariable coal seam thickness and increasing cutting height, abutment pressure peak value tended to stabilize after reaching the maximum, but as the working face advancing its location transferred to the front of coal wall working face and the influence region of abutment pressure increased; with an invariable cutting height and increasing once mining thickness, abutment pressure peak value decreased, and the distance between peak point and coal wall and the influence region increased. The results of the study would have some guiding role in extra-thickness fully mechanized mining’s safety and efficiency.

• Periodical: Advanced Materials Research (Volume 1094)
• Pages: 405-409
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1094.405
• Online since: March 2015
• Authors: Lei Yu*
• Keywords: Abutment Pressure, Analogy Simulation, Fully-Mechanized Sublevel Caving Face, Microseismic Monitoring

References

[1] Yanfang Ren, Yu Ning. Journal of China Coal Society in Chinese, 2014, 39 (S1): 38-42.

[2] Jiachen Wang, Shengli Yang, Guojun Huang. Coal Science and Technology in Chinese, 2013, 41(1): 36~39.

[3] Guangxiang Xie, Lei Wang. Journal of China coal society in Chinese, 2010, 35(2): 177~181.

[4] Shaohong Yan. Coal Science and Technology in Chinese, 2013, 41(9): 96~99.

[5] Yongxue Xia, Hang Lan, Debing Mao. Journal of China University of Mining & Technology in Chinese, 2011, 40(6): 868~872.

[6] Lei Yu , Shaohong Yan, Debing Mao. Journal of China Coal society in Chinese, 2012, 36(S2): 293~298.

[7] Guodong Zhao. Coal mining technology in Chinese, 2014, 19(4): 112~114.

[8] Hongjie Xu, Yongxue Xia, Hang Lan. Coal mining technology in Chinese, 2012, 17(2): 93~95.

[9] Lei Yu, Shaohong Yan, Quanming Liu. Journal of China Coal society in Chinese. 2012, 37(5): 737~742.

[10] Lei Yu, Shaohong Yan, Haiyong Yu, Zhen Zhang. Procedia Engineering in Chinese, 2011, 26, 640~646.