Stress Evolution in Roadway Rock Bolts During Mining in a Fully Mechanized Longwall Face, and an Evaluation of Rock Bolt Support Design

Zhang, Kai; Zhang, Guimin; Hou, Rongbin; Yu, Wu; Zhang, Hongqi

doi:10.1007/s00603-014-0546-4

Cited by 78 publications

(19 citation statements)

References 15 publications

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“…Despite much effort, these active defense methods cannot work well, so the best processing method is still using the rock bolts to resist the impact, instability, and rockfall [15][16][17][18][19][20]. Also taking advantage of the principle of energy, the concept of an energy-absorbing bolt was proposed in South Africa in the early 1990s [21].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Testing on Energy Absorption of High-Damping Rubber in a New Bolt for Preventing Rockburst in Deep Hard Rock Mass

Yang

et al. 2018

Shock and Vibration

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With the increase in mining depth, the deep hard rock mass is under threat of rockburst under high geostress, high temperature, high osmotic pressure, and strong disturbance. To reduce the probability and strength of rockburst, a new energy-absorbing bolt for guaranteeing the stability of deep hard rock mass was developed utilizing the energy absorption characteristic of high-damping rubber. To analyze the practicability and obtain the quantified behaviors of this new energy-absorbing bolt, a series of impact tests on specimens of high-damping rubber, granite, and granite–rubber composite specimens was carried out by a split Hopkinson pressure bar (SHPB) method. Further, considering the different working depths with different rock temperatures, the dynamic energy-absorbing characteristics of high-damping rubber under different temperatures were tested. The testing results show that the new energy-absorbing bolt can consume the storage energy in host rock effectively, and the environmental temperature will produce certain effects on the energy-consuming rate. In addition, the optimal energy-absorbing thickness–diameter ratio of high-damping rubber was confirmed by SHPB tests.

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Section: Introductionmentioning

confidence: 99%

Laboratory Testing on Energy Absorption of High-Damping Rubber in a New Bolt for Preventing Rockburst in Deep Hard Rock Mass

Yang

et al. 2018

Shock and Vibration

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“…A great number of tasks to solve are focused on studying specifics of stress-strain state (SSS) of the massif (for instance, Prusek, 2010;Manoj, 2010;Yu, Kong, Niu, Zhu, & Jing, 2013;Coggan, Gao, Stead, & Elmo, 2012), the choice of technological parameters for mineral deposits' mining (Zhang, Zhang, Hou, Wu, & Zhou, 2014;Shi, Liu, & Wang, 2015) and improvement of constructive schemes of mine workings support, including resourcesaving ways of strengthening the marginal massif by anchor support (Manoj, 2010;Yu, Kong, Niu, Zhu, & Jing, 2013;Coggan, Gao, Stead, & Elmo, 2012;Garg & Jaiswal, 2015;Franklin, Fraley, & Burnham, 1974).…”

Section: Introductionmentioning

confidence: 99%

Numerical methods of geomechanics tasks solution during coal deposits’ development

Bondarenko¹,

Hardygóra²,

Symanovych³

et al. 2016

Min. miner. depos.

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Purpose. Generalization of numerical modeling of geomechanical processes in the vicinity of mine workings by finite elements method and making recommendations for substantiation of suitable construction and behavior of rock massif physical model. Methods.Software packages SolidWorks Simulation (COSMOS/М) and ANSYS are used for geomechanical tasks solution.Findings. Solutions of geomechanical tasks dealing with topical issues of estimating stress-strain state of rock massif around underground workings of different functions are given. Data on the rock massif stress-strain state are received and recommendations on adequate and authentic reflection of its structural peculiarities (stratification and fracturing) are made. Physical model of rock condition (elastic, elastic-plastic, rheological diagrams and complete diagram of deformation taking into account weakening and fracturing) is presented.Originality. New data about the mechanism of movement processes of coal-bearing massif around mine workings considering stratification and cracks content, limit and out-of-limit deflection state in separate areas, and also the impact of rheological rock properties are received.Practical implications. Complex of geomechanical tasks solutions allow to increase credibility of rock pressure manifestations prediction and substantiate technical solutions for effective and safe operations at coal mines.

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“…The initial gas pressure in the coal seam is set to be 1.5 MPa. The coal is considered to be strain softening (Zhang et al, 2015;Zhang et al, 2013), and the parameters referring to the Mohr-Coulomb yield criterion are given in Table 2. The strength parameters decreased linearly to their residual values with the plastic deformation.…”

Section: Boundarymentioning

confidence: 99%

Determination of sealing depth of in-seam boreholes for seam gas drainage based on drilling process of a drifter

Zhang

Sun

et al. 2016

Engineering Geology

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Stress Evolution in Roadway Rock Bolts During Mining in a Fully Mechanized Longwall Face, and an Evaluation of Rock Bolt Support Design

Cited by 78 publications

References 15 publications

Laboratory Testing on Energy Absorption of High-Damping Rubber in a New Bolt for Preventing Rockburst in Deep Hard Rock Mass

Laboratory Testing on Energy Absorption of High-Damping Rubber in a New Bolt for Preventing Rockburst in Deep Hard Rock Mass

Numerical methods of geomechanics tasks solution during coal deposits’ development

Determination of sealing depth of in-seam boreholes for seam gas drainage based on drilling process of a drifter

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