A Numerical Approach Considering Mining-Induced Fracture Weakening and Goaf Compaction on Surface Subsidence

Weng, Liyuan; Luan, Hengxuan; Luan, Yuanzhong

doi:10.1007/s10706-018-0608-6

Cited by 7 publications

(2 citation statements)

References 10 publications

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“…HIFZ is a key factor in preventing water inrush from the roof of a mine, and its maximum value is commonly determined using an empirical formula, a simulation analysis, or a field measurement (Weng et al., 2016; Zhang et al., 2013). Currently, direct monitoring is the most effective method for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Height of interconnected fracture zone based on the impact of rock fragmentation and bulking

Wang

Shi

et al. 2021

Energy Exploration & Exploitation

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The Jurassic coal fields in western China are characterized by thick coal seams and weak overburden. The height of an interconnected fracture zone (HIFZ) is often abnormally high for fracture zones produced by coal seam mining. In this paper, HIFZ is discussed through theoretical analysis, in-situ investigation, and data fitting with regression analysis. A comparison of two calculation methods in this study indicates the applicability of calculating HIFZ by the first method, based on the mechanical relationships among fractured rock strata, i.e., (i) the flexural and breaking limit conditions of roof rock mass, (ii) influence of rock fragmentation and bulking, and (iii) thickness of excavated coal seam. In the second method, an analytical formula of HIFZ is obtained by a fitting regression analysis on the measured data of coal mines under similar geo-mining conditions. For the HIFZ in working face 103 of the Zhuanlongwan coal mine, the two calculation methods yield values of 109.74 m and 92.91 ∼ 114.57 m, respectively. The measured value is 107.67 m, obtained using the method of drilling double-end sealing and water leakage measurement. The results of both theoretical calculations are mostly consistent with the measured value, which verifies the effectiveness of the two prediction methods.

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Section: Introductionmentioning

confidence: 99%

Height of interconnected fracture zone based on the impact of rock fragmentation and bulking

Wang

Shi

et al. 2021

Energy Exploration & Exploitation

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“…FLAC3D has a wide range of applications and has 11 elastoplastic constitutive models and five calculation modes, which can be applied in any combination to simulate soil, rock mass, or other materials. Switching between different models can simulate the engineering behavior of a site [7]. The empty element model can be used to simulate the excavation of an ore body.…”

Section: Introductionmentioning

confidence: 99%

Optimization calculation of stope structure parameters based on Mathews stabilization graph method

Zhao¹,

Wang²,

Li³

et al. 2019

J. vibroeng.

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Mathews stability graphic method, based on the rock classification system, measures the stability of the ore roof area of a relatively simple calculation method and provides a theoretical basis for mine rational design stope structure size parameters. In this study, we used a large-scale tungsten mine in Jiangxi Province as the engineering background and performed on-site engineering geological surveys and indoor ore rock mechanics tests in the middle section of mine 417 to obtain multiple engineering quality indicators for the mines and surrounding rocks. The Mathews stability map method and Barton limit span theory were used. The reasonable size range of the exposed face of the stope was calculated by performing theoretical analysis on the ultimate span. Then, FLAC3D calculation and analysis software were used for the simulation of the stope structure, and the most reasonable design of the exposed surface dimension was selected and used as reference for ensuring the safe production of the mine.

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Deformation Behaviour of Crushed Waste Rock Under Lateral Cyclic Loading

Zhang

Huang

et al. 2021

Rock Mech Rock Eng

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A Numerical Approach Considering Mining-Induced Fracture Weakening and Goaf Compaction on Surface Subsidence

Cited by 7 publications

References 10 publications

Height of interconnected fracture zone based on the impact of rock fragmentation and bulking

Height of interconnected fracture zone based on the impact of rock fragmentation and bulking

Optimization calculation of stope structure parameters based on Mathews stabilization graph method

Deformation Behaviour of Crushed Waste Rock Under Lateral Cyclic Loading

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