Analysis of size effect of mechanical characteristics of coalpillars gob-side entry in inclined thick coal seam

被引：0
|
作者：
Zhao P. [1 ,2 ,3 ]
Li G. [1 ]
Li S. [1 ,2 ]
Liu L. [1 ]
Wang X. [4 ]
Jia Y. [3 ,5 ]
Wang H. [1 ,2 ]
机构：
[1] College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054, Shaanxi
[2] Key Laboratory of Western Mine Exploitation and Hazard Prevention, Ministryof Education, Xi'an University of Science and Technology, Xi'an, 710054, Shaanxi
[3] Xinjiang Coal and CBM Engineering Technology Research Center, Wulumuqi, 830000, Xinjiang
[4] Liuhuanggou Mine, Yankuang Xinjiang Mining Co Ltd, Changji, 831100, Xinjiang
[5] Xinjiang Uygur Autonomous Region Coal Science Research Institute, Wulumuqi, 830000, Xinjiang
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2019年 / 36卷 / 06期
关键词：
ABAQUS; Inclined thick coal seam; Narrow coal pillar; Size effect; Stress peak;
D O I：
10.13545/j.cnki.jmse.2019.06.007
中图分类号：
学科分类号：
摘要：
In order to study the influence of coal pillar width on the vertical and horizontal stress variation of narrow coal pillars gob-side entry in inclined coal seams, withthe gob-side entry of working face (4-5)06 in Liuhuanggou Mine, Xinjiang Mining Co Ltd of Yanzhou Mining Group as the engineering background, the mechanical characteristics and size effect analysis of narrow coal pillars gob-side entry in inclined coal seams have been carried out through the combination of theoretical analysis, numerical simulation and on-site monitoring. The results have shown that with the increase of coal pillar width, the peaks of vertical stress and horizontal stress is on the gradual increase. The fitting equation of peak stress with coal pillar width has been established as well. The damage form of coal pillars with different widths during excavation has been obtained. That is, when the width of the coal pillar is small, an oblique damage will occur at the position of the side of the roadway near the side of the coal pillar and the top of the coal pillar. Then, the shoulder angle position of the narrow coal pillar side roadway has been strengthened and supported in response to the oblique shear failure characteristics of the narrow coal pillars along the inclined thick coal seam. And finally, the reasonable width of the narrow coal pillar has been determined by comprehensive analysis to be 4m. The field engineering practice shows that the 4m coal pillar width can meet the requirements of roadway stability, effectively improving the utilization rate of Xinjiang's coal resources, and it is of great significance to the economic development and the long-term stability in Xinjiang. © 2019, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.
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页码：1120 / 1127
页数：7
相关论文
共 21 条
  • [1] Wang M., Bai J., Wang X., Et al., Study on stability and control of overlying structure of gob-side roadway in deep inclined coal seam, Journal of Mining & Safety Engineering, 32, 3, pp. 426-432, (2015)
  • [2] Chen X., Wang M., Study on deformation characteristics and control technology of surrounding rock in gob in deep inclined coal seam, Journal of Mining & Safety Engineering, 32, 3, pp. 485-490, (2015)
  • [3] Cao S., Wang Y., Zou D., Et al., Analysis of mechanical model of retaining roadway along inclined coal seam, Journal of Chongqing University, 36, 5, pp. 143-150, (2013)
  • [4] Chen Z., Li Y., Yang R., Et al., Non-uniform deformation mechanism and support technology of narrow coal pillar roadway, Journal of China Coal Society, 43, 7, pp. 1847-1857, (2018)
  • [5] Li J., Ma N., Ding Z., Non-uniform large deformation mechanism and stability control of deep roadway along the direction of principal stress, Journal of Mining & Safety Engineering, 35, 4, pp. 670-676, (2018)
  • [6] Ma N., Li J., Zhao Z., Study on the deviation stress field and plastic zone distribution law of surrounding rock in circular roadway, Journal of China University of Mining & Technology, 44, 2, pp. 206-213, (2015)
  • [7] Ma N., Zhao X., Zhao Z., Et al., Stability analysis and control of roof in deep mining roadway, Journal of China Coal Society, 40, 10, pp. 2287-2295, (2015)
  • [8] Feng J., Ma N., Zhao Z., Study on the width of narrow coal pillars along the goaf in deep mining high mining face, Journal of Mining & Safety Engineering, 31, 4, pp. 580-586, (2014)
  • [9] Zhang W., Zhang D., Chen J., Et al., Deformation control of surrounding rock in roadway along narrow coal pillars in isolated working face, Journal of China University of Mining & Technology, 43, 1, (2014)
  • [10] Zhang W., Zhang D., Chen J., Et al., The reasonable position determination of mining roadway in very close distance coal seam, Journal of China University of Mining & Technology, 41, 2, pp. 182-188, (2012)
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