Advance Search
LI Meijie. Analysis of deformation mechanism of soft rock composite slope in open-pit mine[J]. COAL SCIENCE AND TECHNOLOGY, 2021, 49(8): 108-113.
Citation: LI Meijie. Analysis of deformation mechanism of soft rock composite slope in open-pit mine[J]. COAL SCIENCE AND TECHNOLOGY, 2021, 49(8): 108-113.

Analysis of deformation mechanism of soft rock composite slope in open-pit mine

More Information
  • Available Online: April 02, 2023
  • Published Date: August 24, 2021
  • In order to study the deformation mechanism of soft rock composite slope,the east side compound slope with a dump site in an open-pit mine in Xinjiang is taken as the research object. This paper according to the height of the abandoned and the distance between the East and the dump to make four simulation options. Using FLAC3D for numerical simulation numerical,by analyzing the simulation results of the horizontal displacement and monitoring point displacement of the four schemes from time to time,it is found that as the dumping site is higher,the farther the dumping site is from the east side,the position of the maximum horizontal displacement of the slope is moving inside the slope; the displacement of the monitoring point fluctuates slightly at the beginning with time,decreases rapidly in the middle period,and changes smoothly in the later period; during the deformation process,due to the reduction of the restraint effect of the lower rock mass on the upper dump site and the squeeze effect of the dump field on the lower rock mass,a slope deformation chain effect is generated,which accelerates the slope deformation. The deformation mechanism of the slope is analyzed in detail from three aspects:composite,soft rock and excavation. The slip mode is obtained:pull-slip-creep,pull-slicing-slipping-creeping,splitting-cutting-creeping-cutting. Based on the creep mechanism of unstable slope,this paper proposed the mechanism of stability slope creep,it mainly includes five phases:initial deformation phase,deceleration creep phase,constant velocity creep phase,deceleration creep phase Ⅰ,and deceleration creep phase Ⅱ. The mechanism is verified by numerical simulation. The stable slope creep mechanism It has certain guiding significance for the prevention of slope slip.
  • Related Articles

    [1]ZHANG Jie, SUN Jianping, HE Yifeng, ZHANG Yiming, PANG Haibo, WU Haohao, ZHANG Jianchen, PENG Bing. Study on floor stress distribution law and roadway layout of contiguous coal seams[J]. COAL SCIENCE AND TECHNOLOGY, 2024, 52(8): 11-22. DOI: 10.12438/cst.2023-1063
    [2]GUO Shibin, HU Guozhong, ZHU Jiaxin, XU Jialin, QIN Wei, YANG Nan. Intelligent prediction method for roof gas drainage roadway layout[J]. COAL SCIENCE AND TECHNOLOGY, 2024, 52(4): 203-213. DOI: 10.12438/cst.2024-0065
    [3]LYU Kai, HE Fulian, XU Xuhui, WANG Fuzhong, QIN Binbin, LI Liang. Layout of roadway under goaf based on scale effect of mining cross upper coal pillar[J]. COAL SCIENCE AND TECHNOLOGY, 2023, 51(3): 52-60. DOI: 10.13199/j.cnki.cst.2021-0610
    [4]ZHANG Baoyou. Study on the layout of staggered roadway and surrounding rock control technology for extremely close coal seams[J]. COAL SCIENCE AND TECHNOLOGY, 2021, 49(8): 88-95.
    [5]DAl Wenxiang. Study on layout and support technology of strongly disturbed roadway in contiguous coal seam[J]. COAL SCIENCE AND TECHNOLOGY, 2020, 48(12).
    [6]Meng Hao. Study on layout optimization of seam gateway under contiguous seams[J]. COAL SCIENCE AND TECHNOLOGY, 2016, (12).
    [7]Luo Daihong. Study on roadway reasonable layout in steeply inclined contiguous coal seams[J]. COAL SCIENCE AND TECHNOLOGY, 2015, (11).
    [8]JiangLun Lan Yu, . Research on optimal layout of gateway in inclined ultra thick coal seam[J]. COAL SCIENCE AND TECHNOLOGY, 2015, (11).
    [9]ZHANG Chun-lei ZHANG Yong, . Study on Optimal Roadways Layout of Contiguous Seams by Simultaneous Mining[J]. COAL SCIENCE AND TECHNOLOGY, 2014, (10).
    [10]GUO Xiao-qiang DOU Lin-ming XU Bi-gen TANG Shao-hui WEN Xing, . Technology of Preventing Rock Burst by Lateral Layout Roadway Near Goaf[J]. COAL SCIENCE AND TECHNOLOGY, 2014, (2).

Catalog

    Article views PDF downloads Cited by()
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return