Study on reinforcement technique of development roadway with high argillaceous surrounding rock in Jurassic strata

Lian, Cao; Hou, Jifeng; Ge, Gao; Wang, G.; Song, Wei

doi:10.1201/b17617-135

Cited by 1 publication

(2 citation statements)

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“…[10][11][12][13][14] The adhesive strength between liner material and substrate was proposed by researchers to be one of the key parameters affecting the support effect. [15][16][17] During the support process, the liner material is in close contact with the substrate surface. With sufficient adhesive strength, the liner material can transfer the load generated by gravity falls or loose substrate onto a stable or continuous substrate surface, avoiding possible injury to workers or damage to equipment caused by falling loose substrate.…”

Section: Introductionmentioning

confidence: 99%

“…18 The factors influencing the adhesive strength of liner materials have also been the focus of many scholars' research. 15,[19][20][21][22][23][24][25][26][27] Achievements in understanding the influence of various factors on the adhesive strength of liner materials have been accomplished by researchers in various countries. Li et al 23 carried out pull-off tests on liner materials adhered to both complete and fractured coal areas under different curing time conditions.…”

Section: Introductionmentioning

confidence: 99%

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Effects of substrate materials and liner thickness on the adhesive strength of the novel thin spray-on liner

Chen

Zhou

Liu

et al. 2020

Advances in Mechanical Engineering

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In order to comprehensively investigate the influence of the thickness of thin spray-on liners on their adhesive strength with different surrounding rock environments, pull-off tests were employed to measure the adhesive strength of thin spray-on liners of different thickness on the surface of various substrates (granite, sandstone, concrete, and coal), which were used to simulate different surrounding rock environments. The results indicated that the failure mode was mainly liner material–substrate adhesion failure when granite, sandstone, or concrete was used as the substrate, while substrate failure was observed to occur more frequently when coal was used as the substrate. The variation rules of the adhesive strength ( σ) of thin spray-on liners, along with liner thickness ( t), for different surrounding rock environments were obtained: [Formula: see text] for granite, [Formula: see text] for sandstone, [Formula: see text] for concrete, and [Formula: see text] ( t < 4) and [Formula: see text] ( t≥4) for coal. Furthermore, analysis of the standard deviation of experimental adhesive-strength data suggested that the variation in adhesive strength decreased in the following sequence: coal > concrete > sandstone > granite. The achievements of the current study provide a theoretical basis for the on-site determination of thin spray-on liner thickness requirements, as well as the scientific and rational design of liner material structure.

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