Stress distribution and deformation characteristics of roadside backfill body for gob-side entry of fully-mechanized caving in thick coal seam

被引：0
|
作者：
Feng G. [1 ,2 ]
Ren Y. [1 ,2 ]
Wang P. [1 ,2 ]
Guo J. [1 ,2 ]
Qian R. [1 ,2 ]
Li S. [1 ,2 ]
Sun Q. [1 ,2 ]
Hao C. [1 ,2 ]
机构：
[1] College of Mining Technology, Taiyuan University of Technology, Taiyuan, 030024, Shanxi
[2] Research Center of Green Mining Engineering Technology in Shanxi Province, Taiyuan, 030024, Shanxi
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2019年 / 36卷 / 06期
关键词：
Deformation characteristics; Full-mechanized caving mining; Gob-side entry; Roadside backfill body; Stress distribution;
D O I：
10.13545/j.cnki.jmse.2019.06.006
中图分类号：
学科分类号：
摘要：
Based on the application of retained gob-side entry in fully-mechanized face3307, the stress distribution and deformation characteristics of roadside backfill body have been studied through theoretical analysis and FLAC3D numerical simulation during the mining of fully-mechanized caving face in thick coal seam. The results are as follows:1) the support resistance of the roadside backfill body is analyzed and calculated, and the support of roadside backfill body is obtained, P=11. 23 MPa by superimposed continuous layer plate model. 2) The vertical stress, horizontal stress and shear stress of the roadside backfill body areincreasing and eventually maintaining constant with the continuous advance of the working face. The distribution of vertical stress, horizontal stress and shear stress are asymmetric from gob to entry. 3) The subsidence of the top and the horizontal deformation of both entry side and gob side of the roadside backfill body also show a trend of increasing and eventually maintainingconstant with the continuous advance of the working face. The distribution of the top subsidence of the roadside backfill body shows the characteristics of non-uniform subsidence, in which the side of roadway is small and the side of gob is large. And the horizontal deformation of the roadside backfill body beside the roadway and the gob shows the characteristicsof being slow at the lower part and severe at the upper part. 4) The characteristics of stress and deformation of the roadside backfill body are directly related to the primary and periodic breaking characteristics of the roof of fully-mechanized caving face in thick coal seam. This study can provide some reference for the engineering application of gob-side entry in mines with similar conditions. © 2019, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.
引用
收藏
页码：1109 / 1119
页数：10
相关论文
共 20 条
  • [1] Miao X., Review of research on mechanical behaviors of mining rock mass and its related engineering technological innovation progress, Chinese Journal of Rock Mechanics and Engineering, 29, 10, pp. 1988-1998, (2010)
  • [2] Feng G., Wang P., Chughl Y.P., A new gob-side entry layout for longwall top coal caving, Energies, 11, 5, (2018)
  • [3] Li Y., Hua X., Mechanical analysis of stability of key blocks of overlying strata for gob-side entry retaining and calculating width of roadside backfill, Rock and Soil Mechanics, 33, 4, pp. 1134-1140, (2012)
  • [4] Li Y., Hua X., The stability of key block and calculating the width of roadside backfill in a secondary gob-side entry retaining, Journal of Mining & Safety Engineering, 29, 6, pp. 783-789, (2012)
  • [5] Zhang D., Mao X., Ma W., Testing study on deformation features of surrounding rocks of gob-side entry retaining in fully-mechanized coal face with top-coal caving, Chinese Journal of Rock Mechanics and Engineering, 21, 3, pp. 331-334, (2002)
  • [6] Zhang D., Miao X., Mao X., Simulation on roof activities of gob-side entry retaining in fully-mechanized top-coal caving faces, Journal of China University of Mining & Technology, 30, 3, pp. 261-264, (2001)
  • [7] Kan J., Zhang N., Li B., Et al., Analysis of supporting resistance of backfilling wall for gob-side entry retaining under typical roof conditions, Rock and Soil Mechanics, 32, 9, pp. 2778-2784, (2011)
  • [8] Chen S., Zhao Y., Xie W., The influence of characteristics of stowing material to surrounding rock stability in gob-side retaining entry with top-coal caving, Ground Pressureand Strata Control, 2, (2001)
  • [9] Chen Y., Bai J., Zhu T., Et al., Mechanisms of roadside support in gob-side entry retaining and its application, Rock and Soil Mechanics, 33, 5, pp. 1427-1432, (2012)
  • [10] Huang Y., Zhang J., Ju F., Technology of road side packing in gob-side entry retaining and law of rock pressure, Journal of Xi'an University of Science and Technology, 29, 5, pp. 515-520, (2009)
12