Law of Ground Subsidence and Strata Movement Caused by Backfill Mining of "under Three" Coal

Abstract:

Taking 24 mining area of Zhouyuanshan mine as the research object, analysis on law of ground subsidence and strata movement caused by backfill mining of "under three" coal is carried on by using numerical simulation method. A three-dimensional numerical model is established by using FLAC 3D software. To analyze the computational scheme of remain wide coal pillar and gradually to finish backfill mining, results showed that the maximal subsidence displacement value is 30.8mm along the coal strike and the subsidence displacement value is 32.1mm along the coal seam inclination; In addition, computational scheme of backfill mining with narrow coal pillar is analyzed, results showed that the filling body plays a stronger supporting role for the roof strata, to fully mobilize the bearing capacity of filling body, forming a relatively coordinated bearing system of " backfill body + coal pillar + overlying strata ".

• Periodical: Advanced Materials Research (Volumes 807-809)
• Pages: 2304-2308
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.807-809.2304
• Online since: September 2013
• Authors: Wei Jian Yu, Tao Feng, Xin Yuan Chen
• Keywords: "Under Three" Coal (Under Buildings, Railways and Water Bodies), Backfill Mining, Ground Subsidence, Numerical Analysis

References

[1] Weijian Yu, Weijun Wang: Chinese Journal of Rock Mechanics and Engineering，Vol. 30 (2011), pp.105-112, in Chinese.

[2] Weijian Yu, Tao FENG， Weijun WANG，and Shilin LI: Chinese Journal of Rock Mechanics and Engineering, Vol. 31 (2012), pp.2803-2813, in Chinese.

[3] Weijian Yu, Shuhai Zhai, and Qian Gao: Disaster Advances, Vol. 5 (2012), pp.120-126.