Reinforcement systems mechanics, design, installation, testing, monitoring &amp; modelling

Windsor, Christopher R; Thompson, Amanda L.

doi:10.1016/s0148-9062(98)00092-8

Cited by 6 publications

(2 citation statements)

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“…Li and Stillborg [9] and Cai et al [10] carried out a systematic study on the bolt load in fractured rock mass and proposed the mechanical distribution form of bolt in jointed rock mass. Windsor and ompson [11] gave a qualitative description of the stress of bolts with the occurrence of cracks in surrounding rocks. Li [12] pointed out that the occurrence of cracks in anchored rock mass would exercise tension on the bolt, and a static load test was designed to measure the stress distribution subjected to the opening of rock joints, followed by the impact test [13].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Mechanical Characteristics of Bolts under Roof Separation Based on Exponential Function

Ding

2020

Mathematical Problems in Engineering

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With regard to the excavation of coal mine tunnels, the phenomenon of roof separation frequently occurs owing to the deformation of roadway surrounding rocks, and the analysis of the influence of surrounding rock separation on bolt reinforcement plays an indispensable role in the security of support engineering. In the present paper, the hyperbolic function model of bolt load transfer is simplified to the exponential function form, and the simplified distribution form is modified by error analysis. Drawing on the analytic model of elastoplastic mechanics of bolt load through separation, this paper further investigates the influence of separation development on bolt load and conducts the parametric analysis of the separation value and separation position. Finally, taking the separation effect into consideration in the anchorage design of coal mine, practical reference value has been attached to the supporting design of underground engineering in bedded rock mass.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Mechanical Characteristics of Bolts under Roof Separation Based on Exponential Function

Ding

2020

Mathematical Problems in Engineering

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“…With the increasing mining depths for both coal mines and metal ore, tunnels being built in deep ground are often subjected to high stresses and complex geological conditions. Accordingly, surrounding rock masses in deep ground tend to experience various static and dynamic disasters such as creep and rock bursts [1][2][3][4]. The constant-resistance-largedeformation bolt possesses more excellent performance than the traditional rebar in the areas of the control of roadway with slow and large deformation, the prevention of dynamic disaster in deep mine, and the monitoring and early warning of landslide [5].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Model and Mechanical Properties of the Two Parallel-Connected CRLD Bolts Verified with the Impact Tensile Test

Hao

Gong

et al. 2018

Mathematical Problems in Engineering

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Dynamic model was theoretically established for the two parallel-connected constant-resistance-large-deformation (CRLD) bolts, and the theoretical results were experimentally verified with impact tensile tests on the CRLD bolts samples. The dynamic responses of the double CRLD bolts were investigated under the impact loads with different intensities. The theoretical analyses showed that (1) under relatively small loading the CRLD bolts deform elastically and the deformation finally returns to zero and (2) under the high impact load, including the stable impact load and unstable impact load, the CRLD bolts export structural deformation after the initial elastic deformation. The deformation of the bolts eventually stabilizes at a certain amount of the elongation caused by the relative sliding of the sleeves and rebars. The essential difference between the stable impact load and unstable impact load is that, under the stable impact load, no structural deformation will occur after the impact load ends; under the unstable impact load, the structural deformation will still occur after the impact load ends. The obtained results are of theoretical implications for rock support design with CRLD bolts under the dynamical loading condition.

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Deformation and force analysis of inclined bolt under roadway roof separation

Ding

2022

Arab J Geosci

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Reinforcement systems mechanics, design, installation, testing, monitoring & modelling

Cited by 6 publications

References 0 publications

Analysis of the Mechanical Characteristics of Bolts under Roof Separation Based on Exponential Function

Analysis of the Mechanical Characteristics of Bolts under Roof Separation Based on Exponential Function

Dynamic Model and Mechanical Properties of the Two Parallel-Connected CRLD Bolts Verified with the Impact Tensile Test

Deformation and force analysis of inclined bolt under roadway roof separation

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