Unloading-slippage mechanism of coal bump in gateroad of longwall

Han, Jun; Dong-xu, Jia; Hui, Qianjia; Cui, Luyu; Zhu, Zhangming; Chen, Chen

doi:10.1016/j.ghm.2023.06.003

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…wall material, 12 mixed cement, 10 aggregates, 13 pavement base materials 14 ); (2) soil improvement (e.g. microbial diversity, 15 soil conditioner, 16 modication the structure of sand for planting 17 ); (3) water remediation (e.g. zeolites, 18,19 adsorbent, 20 occulants 21 ); (4) other uses (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the country's coal consumption saw a rise of 4.6%. 3 Therefore, the efficient and clean utilization of coal is particularly important. Coal gasification is one of the core technologies for the efficient and clean utilization of coal, 4 and it is also the basis for the synthesis of many chemical products, such as the synthesis of methane, 5 methanol 6 and dimethyl ether.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Coal gasification crude slag based complex flocculants by two-step acid leaching process: synthesis, flocculation and mechanisms

Pan,

Sun,

Shen

et al. 2024

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coal gasification crude slag based complex flocculants by two-step acid leaching process: synthesis, flocculation and mechanisms

Pan,

Sun,

Shen

et al. 2024

RSC Adv.

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show abstract

“…In the corresponding stress change, the original three-dimensional static combined coal-rock microelement gradually shifts to a cyclic dynamic. According to incomplete statistics [8][9][10][11][12][13], impact ground pressure is more likely to occur in the mining roadway. The mining roadway is located at the junction of the coal-rock combination, and its mechanical characteristics are quite different.…”

Section: Introductionmentioning

confidence: 99%

The Failure Characteristics and Energy Evolution Pattern of Compound Coal–Rock under the Action of Cyclic Loading

et al. 2023

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Based on the entire loading process of compound coal–rock, test pieces with three different coal/rock ratios (1:3, 1:1, and 3:1) have been constructed and the corresponding cyclic loading experiments have been carried out. Through the experiment, the deformation and failure characteristics of the compound coal–rock samples have been explored and the stage evolution characteristics of energy density have been subsequently analyzed. Ultimately, the relation between deformation failure and the energy evolution mechanism has been established, and thus the reasons behind rock bursts in the coal–rock compounds have been discussed. The experimental results indicate that with the increase in cyclic loading, the stress–strain curve of the compound coal–rock demonstrates a positive shift, whereas the change in the hysteretic curve from dense to sparse results in a “hysteresis expansion”. The increase in the coal body height increases the chance of brittleness failure of the compound coal–rock. The coal body, as the main controlling factor of compound coal–rock failure, generates cracks that expand to the rock body along the juncture of the coal and rock, leading to instability. The energy density evolution curve can be described by a quadratic function. The evolution process is initiated from the slow increase in input energy density and elastic energy density. A large amount of energy is stored through the rapid increase in the density mentioned above. At last, the evolution is completed by a surge in dissipated energy. The energy evolution drives the crack expansions in the compound coal–rock under load. The energy accumulation in the compound coal–rock is increased by the exploitation of the clamping effect of the thick and hard top and bottom plate. The risk of rock burst is intensified by the failure of the coal body because of the energy in the coal–rock system. The study results help to comprehend the energy evolution pattern in the surrounding rock of deep mining roadways and expand the prevention methods for impact ground pressure.

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Unloading-slippage mechanism of coal bump in gateroad of longwall

Cited by 2 publications

References 4 publications

Coal gasification crude slag based complex flocculants by two-step acid leaching process: synthesis, flocculation and mechanisms

Coal gasification crude slag based complex flocculants by two-step acid leaching process: synthesis, flocculation and mechanisms

The Failure Characteristics and Energy Evolution Pattern of Compound Coal–Rock under the Action of Cyclic Loading

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