Stress corrosion testing of roof bolt grade 60 steel in simulated underground coal mine atmosphere

Bylapudi, Gopi; Spearing, A.J.S.; Mondal, Kanchan; Bhagwat, Anand

doi:10.1080/25726668.2019.1616951

Cited by 8 publications

(3 citation statements)

References 17 publications

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“…The corrosion rate was highest under strong acidic conditions, and slightly smaller under neutral and alkaline conditions. Spearing et al 11 , 12 and Wu et al 13 investigated the corrosion status of bolts in underground coal mines, and reported that the stress corrosion of bolts is an important problem related to the premature failure of bolts in underground coal mines. Yu et al 14 , Sun et al 15 , and Peng et al 16 investigated the mechanical properties and microscopic characteristics of rock in different hydrochemical environments and obtained the corresponding variation laws.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the influence of mine water on mechanical properties of resin grout

He,

Liu,

Zhai

et al. 2024

Sci Rep

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Resin grout is widely used in geotechnical and underground engineering, and is often affected by different mine water solutions. This study considered the effects of different mine water solutions and soaking times on resin grout. Soaking tests and uniaxial compression tests were conducted to investigate the changes in the solution pH, relative specimen mass, and uniaxial compressive strength (UCS), and the deterioration of the resin grout’s mechanical properties caused by the mine water solution was analyzed. The corrosion mechanism of resin grout under the action of different mine water solutions was investigated through scanning electron microscopy tests. The results reveal that the pH value of the solution and the relative mass of the specimen gradually stabilized as the soaking time was extended, and the final solution was weakly alkaline. The increase in the acidity and alkalinity of the solution and the extension of the soaking time led to a gradual decrease in the UCS and elastic modulus of resin grout under the action of mine water. As the soaking was prolonged, the resin grout properties deteriorated to different degrees and Poisson’s ratio increased. Moreover, owing to the different types and degrees of mine water action on resin grout in different mine water environments, the changes in the resin grout microstructure were also different. The defined damage parameters can express the damage process of the resin grout’s UCS quantitatively under the action of mine water solution. Finally, beneficial engineering application countermeasures are proposed for different resin grout types used in roadway support applications in coal mines.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation of the influence of mine water on mechanical properties of resin grout

He,

Liu,

Zhai

et al. 2024

Sci Rep

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“…The performance of the rock reinforcement bolts is critical for the safety of mineworkers and to avoid economic loss caused by the bolt replacement downtime. In the past decades, failures of bolts have been reported from underground mines and tunnels across the world [1][2][3][4][5][6][7][8][9][10][11][12]. Many companies involved in the underground mining and tunnelling industry are concerned about the integrity of their rock reinforcement bolts in underground mines.…”

Section: Introductionmentioning

confidence: 99%

The effectiveness of epoxy coating for preventing microbially induced corrosion of rock bolts

Chen

Kimyon

Chen

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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In the past two decades, the corrosion failures of rock reinforcement bolts in underground coal mines have been increasingly reported. Preliminary studies have shown that these failures were predominantly related to pitting and stress corrosion cracking. The analyses in affected mines indicated microbially induced corrosion (MIC) as one of the primary corrosion causes. As such, there is an urgent demand from industries to develop methods to mitigate MIC-associated failures of rock bolts in underground coal mines. This study examined epoxy coating to determine its effectiveness in preventing biofilm formation on steel surfaces and, in turn, averting MIC. The corrosion-causing bacteria were isolated and enriched from groundwater samples collected from the affected mine sites. Coated and uncoated rock bolt samples were prepared from the bolts and incubated in media in the absence and presence of the corrosion-causing bacteria. Fluorescence microscopy imaging found no evidence of bacterial biomass growth on the surface of the epoxy-coated steel surfaces after 30 days, while the non-coated surfaces were colonised by biomass. The observations suggest the potential of epoxy coating for bolt MIC prevention. Future studies to assess the applicability of epoxy coating in the underground mine environment are recommended.

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“…However, the durability of these installations may also depend on their corrosion properties in mine environments they are subjected to (Divi et al 2011). Rock bolt corrosion in underground mines is, therefore, a potential threat to the mine safety (Shutter et al 2001; Hebblewhite et al 2003; Elias et al 2013; Spearing et al 2013; Aziz et al 2014; Bylapudi et al 2015; Kang et al 2015; Bylapudi et al 2019; Guo et al 2019; Bylapudi et al 2020; Chen et al 2018). Corrosion is an electrochemical process, and hence understanding the electrochemical properties of the rock bolt steel in underground mines is vital.…”

Section: Introductionmentioning

confidence: 99%

Corrosion properties of ASTM A615 rock bolt steel in US underground coal mines

et al. 2020

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Corrosion of rock bolts is a relatively slow process yet a potential problem for the underground mining industry. Mine groundwater in the strata through natural or mining-induced cracks together with the humid environment in the mine openings interact with the roof support systems often resulting in corrosion. Electrochemical studies of the commonly used rock bolt steel in the coal mining environments will lead to a better understanding of the material's performance and their ability to resist corrosion. The influence of pH, solution resistivity, total dissolved solids, and aggressive ions on the electrochemical properties of rock bolt steel are discussed. This preliminary study focuses on understanding the corrosion potential, polarization resistance, and corrosion rates of the rock bolt steel that is most commonly used in US underground coal mines. Based on the findings, it was observed that the polarization resistance (Rp) is inversely proportional to the corrosion rate (CR) over time.

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Stress corrosion testing of roof bolt grade 60 steel in simulated underground coal mine atmosphere

Cited by 8 publications

References 17 publications

Experimental investigation of the influence of mine water on mechanical properties of resin grout

Experimental investigation of the influence of mine water on mechanical properties of resin grout

The effectiveness of epoxy coating for preventing microbially induced corrosion of rock bolts

Corrosion properties of ASTM A615 rock bolt steel in US underground coal mines

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