Self-bearing Characteristics and Control Strategy of a Cataclastic Regenerated Rock Mass in a Roadway Roof with Top Remains: A Case Study

Ma, Wenqiang; Wang, Zhenhui; Wang, Tongxu

doi:10.1007/s10706-020-01262-0

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…In order to maintain long-term service in the section of the roadway, the roadway is generally dug along the roof of the coal seam to increase roof stability and integrity, during the layout of the coal mine roadway. That has achieved good application results in some roadways with low roof pressure and good roof integrity (Keshavarz and Ghajar, 2018; Ma et al., 2017; Ma and Wang, 2019; Xu et al., 2017; Zhang et al., 2014, 2019). However, this also exposed some problems, such as the roadways affected by the mining pressure, and the “island” roadways mined on both sides.…”

Section: Introductionmentioning

confidence: 99%

Research on strain softening constitutive model of coal-rock combined body with damage threshold

Wang

2021

International Journal of Damage Mechanics

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The coal seam and the roof of the roadway bear loads together in the underground engineering of coal mine. Especially for the roadway driven along the roof, its deformation is completely different from that arranged in the complete rock stratum. Accurately knowing the mechanical mechanism of coal-rock combined body can help understand the deformation and failure modes of such roadways. This article started with tests of coal-rock combined samples with different height ratios, based on the test results, a strain softening damage constitutive model of coal-rock combined body and a method for solving the parameters of the model were proposed, and the influence of the model parameters was discussed. The test results show that the stress peak value and residual strength of the coal-rock combined samples are negatively correlated with the proportion of coal in the coal-rock combined samples, and have a positive correlation with the confining pressure. The damage constitutive model fitted the test curve well. The model can accurately describe the stress-strain curve of coal-rock combined samples, and can reflect the influence of different height ratios of coal and rock samples and confining pressures. The effects of model parameters were discussed based on the damage constitutive model, which are expected to be widely used in underground engineering.

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Section: Introductionmentioning

confidence: 99%

Research on strain softening constitutive model of coal-rock combined body with damage threshold

Wang

2021

International Journal of Damage Mechanics

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Optimization of anchorage support parameters for soft rock tunnel based on displacement control theory

Li¹,

Ma²,

Yu³

et al. 2023

J. Mt. Sci.

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Mechanical property testing and damage assessment of the regenerated rock mass with very weakly bonded cement

Wang,

Jiang,

Ding

et al. 2024

Front. Built Environ.

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The regenerated rock mass is a bearing structure formed by natural compaction in a hollow area, and the investigation of its optimal consolidation material and consolidation parameters is the key to improving the supporting effect and bearing stability of roadways. The effects of consolidation materials and parameters on the stability of the regenerative rock mass were studied using laboratory tests, numerical simulations, and theoretical analyses. Acoustic emission was used to monitor the variation characteristics of energy and ringing count during the process of rock mass failure, and the bonding interface area of the extremely weak cementation regeneration structure was tested by electron microscope scanning. The results show that there is a quadratic function relationship between the water–cement ratio of different cementing materials and the bond strength of the recycled rock mass; the regenerative rock mass with superfine cement exhibited the highest compressive strength and the largest cumulative energy of acoustic emission. This shows that it has the strongest bearing capacity, the highest elastic performance, the most stable micro-fracture development, and the best cementation effect, followed by ordinary cement, gypsum, and laterite. The scanning test showed that the regenerated structure had more internal pores, a loose structure, and poor cementation. Three-dimensional scanning modeling of four representative broken rock blocks was carried out, and the simulation verified that the regenerated structure had macroscopic “X”-shaped shear failure characteristics. The numerical simulation also verified three forms of rupture in the regenerative structure detected by electron microscopy scanning. Exploring the mechanism of action of the regenerative rock mass in the goaf provides a certain reference value for the stability control of the regenerated rock mass roadway.

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Self-bearing Characteristics and Control Strategy of a Cataclastic Regenerated Rock Mass in a Roadway Roof with Top Remains: A Case Study

Cited by 3 publications

References 23 publications

Research on strain softening constitutive model of coal-rock combined body with damage threshold

Research on strain softening constitutive model of coal-rock combined body with damage threshold

Optimization of anchorage support parameters for soft rock tunnel based on displacement control theory

Mechanical property testing and damage assessment of the regenerated rock mass with very weakly bonded cement

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