Application of fuzzy comprehensive assessment and rock engineering system to assess cavability in block caving mining and establishment of its regionalized model

Liu, Huan; Ren, Fangfang; He, Rongxing; Li, Guanghui; Zhang, Jing

doi:10.1007/s12665-020-09296-6

Cited by 2 publications

(1 citation statement)

References 35 publications

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“…Underground non-coal mines are usually mined by caving method or empty field method (Heidarzadeh et al 2019;Liu et al 2021;Xia et al 2021;Xu et al 2021;Castro et al 2022). When the span of the goaf exceeds the critical caving span with the continuous mining (He et al 2017;, the roof rock mass of the goaf will cave.…”

Section: Introductionmentioning

confidence: 99%

Research on Rock Movement Control Method in Underground Mining Based on the Action of Granular Lateral Pressure

Zhang,

Liu,

Liu

et al. 2023

Mining, Metallurgy & Exploration

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Lateral pressure provided by caving rocks plays an important role in keeping the stability of the sidewall rock mass and controlling the rock movement. Taking Xilinhot Fluorite Mine as an engineering background, we studied the control mechanism of the granular media lateral pressure on the rock movement by combining physical experiments, theoretical analysis and field monitoring. The results indicated that with the increase of the granular media depth, the lateral pressure provided by the static granular media presented two stages of rapid growth and slow growth. The lateral pressure on the footwall was negatively correlated with the dip angle of the orebody, and the lateral pressure on the hanging wall was positively correlated with the dip angle of the orebody. Ore drawing only caused the granular media lateral pressure near the drawing point to decrease. As the granular media moved, the granular media lateral pressure outside the pressure reduction area further increased, and this part of the granular media would play a key role in limiting surface rock movement. On this basis, the improved calculation formula of GLMP was given, which could be better applied to calculate the GLMP and critical granular media column with different dip angles. The action mechanism of the GLMP in the control of the surface rock movement was clarified. The granular body in the collapse pit was mainly composed of three parts: the bottom loose granular media column, the middle compaction granular media column and the upper critical granular media column. The critical granular media column was the most important area to control surface subsidence and rock movement. Finally, through field practice, after effective filling of the collapse pit, the surface vertical displacement of the hanging wall and footwall was decreased by 56.8% and 55.6%, respectively, and the control effect of surface rock movement was remarkable. Keywords: lateral pressure physical experiment critical granular media column rock movement control underground mining Caving block Collapse pit Fractured rock mass

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