Study on the Settlement Mechanism with Effect of Backfilling Method of an Underground Mine

The study on the subsidence of backfill mining block has been a concern of many scholars. A mechanical model of plate subsidence is established by studying the roof of a filling mining area in Luo Iron Mine in this paper. The boundary conditions are given, and the Navier method is used to solve the problem. Based on the thin plate model, the subsidence distribution map of the roof of the underground plate area is obtained. Based on the basic calculation parameters, the influence of a different foundation coefficient, mining depth, length-width ratio of plate area, elastic modulus of roof rock, and thickness of roof on the subsidence of roof is studied. According to the deflection calculation formula obtained, the expression of the internal force and stress is deduced, and the distribution of stress and shear stress on the upper and lower surfaces of the roof is analyzed. The dangerous area of the roof can be obtained, which provides a theoretical basis for the daily maintenance of mine safety.

[1]  C. Li,et al.  A strain-based fatigue damage model for naturally fractured marble subjected to freeze-thaw and uniaxial cyclic loads , 2021, International Journal of Damage Mechanics.

[2]  Y. Wang,et al.  Anisotropic fracture and energy characteristics of a Tibet marble exposed to multi-level constant-amplitude (MLCA) cyclic loads: A lab-scale testing , 2021 .

[3]  K. Jansen,et al.  Direct numerical simulation of a turbulent boundary layer over a bump with strong pressure gradients , 2020, Journal of Fluid Mechanics.

[4]  P. Zou,et al.  Numerical Investigation on Safe Mining of Residual Pillar in Goaf: A Case Study of Panlong Lead–Zinc Mine , 2020, Geotechnical and Geological Engineering.

[5]  J. Zuo,et al.  Strata Movement Model of Filling Coal Mining Based on Two-Parameter Elastic Foundation , 2020, Geotechnical and Geological Engineering.

[6]  Jixiong Zhang,et al.  Time-dependent lateral pressure of the filling barricade for roadway cemented backfill mining technology , 2020, Mechanics of Time-Dependent Materials.

[7]  D. Tannant,et al.  Application of double-yield model in numerical simulation of stability of mining filling body , 2019, Arabian Journal of Geosciences.

[8]  K. Zhou,et al.  Mining Scheme Optimization and Stope Structural Mechanic Characteristics for a Deep and Large Ore Body , 2019, JOM.

[9]  K. Ding,et al.  Study on Compaction Characteristics of Paste Filling and Its Application , 2018, Geotechnical and Geological Engineering.

[10]  Rui Zhang,et al.  Limit Analysis of Stability of Twin Shallow Tunnels Considering Surface Settlement , 2018 .

[11]  Chuan Xu,et al.  The mechanism of hysteretic ground settlement caused by shield tunneling in mixed-face conditions , 2018 .

[12]  Rui Zhang,et al.  Kinematic analysis of shallow tunnel in layered strata considering joined effects of settlement and seepage , 2018 .

[13]  Huaizhan Li,et al.  Subsidence prediction method of solid backfilling mining with different filling ratios under thick unconsolidated layers , 2017, Arabian Journal of Geosciences.

[14]  Xiao-li Yang,et al.  Limit analysis of supporting pressure in tunnels with regard to surface settlement , 2015 .

[15]  S. M. Dasaka,et al.  Effect of Uncertainties in the Field Load Testing on the Observed Load–Settlement Response , 2014 .

[16]  Jie Guo,et al.  Monitoring and mechanisms of ground deformation and ground fissures induced by cut-and-fill mining in the Jinchuan Mine 2, China , 2013, Environmental Earth Sciences.

[17]  Hong Tian,et al.  The influences of mining subsidence on the ecological environment and public infrastructure: a case study at the Haolaigou Iron Ore Mine in Baotou, China , 2009 .

[18]  Ying-she Luo,et al.  Mechanism and calculation method of rheological settlement of high-filled embankment , 2008 .