Study on Tamped Spherical Detonation-Induced Dynamic Responses of Rock and PMMA Through Mini-chemical Explosion Tests and a Four-Dimensional Lattice Spring Model

Ma, Jianjun; Zhao, Jing; Lin, Yuexiang; Liang, Jiguan; Chen, Junjie; Chen, Wanxiang; Huang, Linchong

doi:10.1007/s00603-023-03426-9

Cited by 37 publications

(22 citation statements)

References 64 publications

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“…The deformation and failure of rock is essentially a non-equilibrium thermodynamic process, which generally goes through the stages of energy input, energy accumulation, energy dissipation and energy release during failure [20][21][22]. Energy dissipation causes damage to the rock mass, which leads to the deterioration of material properties and the loss of strength, while the release of energy causes the overall failure of rock.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Energy Evolution of Sandstone with Different Moisture Content under Uniaxial Compression

Liu,

Zhao,

et al. 2024

Sustainability

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In order to investigate the impact of moisture content on energy evolution, three types of rock samples with varying moisture contents were subjected to uniaxial compression tests. The study aimed to analyze the reasons behind the differences in energy during the deformation process of rocks with different moisture contents. The findings indicate that with increasing moisture content, the peak strength and elastic modulus of the samples decrease. However, the ratio of crack initiation strength σci to peak strength σf shows little effect, primarily because the characteristic strength ratio σci/σf is determined by external loads. The growth rate of elastic energy reaches its maximum value in the early stage of yield, while the proportion of elastic energy reaches its peak value in the later stage of yield. In the deformation and failure process of rocks with varying moisture contents, the increment in elastic performance is smallest in the initial compaction stage for saturated rocks, whereas it is the largest in the yield stage for dry rocks. Additionally, a damage evolution equation based on energy dissipation was established and validated.

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Section: Introductionmentioning

confidence: 99%

Experimental Research on Energy Evolution of Sandstone with Different Moisture Content under Uniaxial Compression

Liu,

Zhao,

et al. 2024

Sustainability

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“…Deep coalbed methane (CBM) reservoirs, in contrast to shallow counterparts, are typified by adverse physical properties and high in-situ stress. Consequently, conventional fracturing technologies have limited efficacy, necessitating the deployment of long horizontal wells and large-scale hydraulic fracturing technologies for their development [1][2][3][4][5][6]. CBM reservoirs, inherently comprising a dual pore media system (matrix and cleat), harbor extensive natural fractures that compound into complex networks post-fracturing [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A Semi-Analytical Model for Production Prediction of Deep CBM Wells Considering Gas-Water Two-Phase Flow

Wang,

Li,

2023

Processes

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The productivity prediction of deep coalbed methane (CBM) wells is significantly influenced by gas-water two-phase flow characteristics and seepage parameters of the fracture network. While numerical simulations offer a comprehensive approach, analytical models are favored for their faster and broader applicability. However, conventional analytical models often oversimplify the complex problem of two-phase seepage equations, leading to substantial errors in dynamic analysis outcomes. Addressing this shortcoming, we establish a gas-water two-phase productivity prediction model for deep CBM reservoirs. This model takes into account the two-phase flow characteristics within the reservoir and fracture network, as well as the stress sensitivity of the reservoir and fractures. Additionally, a modified trilinear flow model characterizes the fractured modification body. By integrating the flowing material balance equation with the Newton Iteration method, we gradually update the seepage model’s nonlinear parameters using the average formation pressure. We also linearize the gas-water two-phase model through successive iterations to derive a semi-analytical solution. The accuracy of the model was verified through comparison with commercial numerical simulation software results and field application. The model also enabled us to scrutinize the influence of reservoir and fracture network parameters on productivity. Our research findings suggest that the semi-analytical solution approach can efficiently address the nonlinear seepage problem of gas-water two-phase flow, enabling quick and accurate prediction of deep CBM well productivity. Moreover, appropriate fracture network parameters are paramount for enhancing the productivity of deep CBM wells. Lastly, during the development of deep CBM reservoirs, it is crucial to control the production pressure difference appropriately to minimize the stress sensitivity impact on production capacity.

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“…Han et al [24][25][26][27] combined the theory of elastic-plastic mechanics to analyze the stress evolution and instability failure process of surrounding rock under different conditions under the influence of faults. Ma et al [28] reproduced the dynamic process and fracturing mode of the overlying rock layer through the M-JHB-4DLSM model experiment, which is of great significance for studying the impact effect of near-buried blasting tunnels. Through theoretical analysis and on-site measurement methods, Sainoki et al [29,30] summarized the principle and applicability of stopping mining and yielding pressure during the final mining stage, combined with the pressure law of the working face.…”

Section: Introductionmentioning

confidence: 99%

Study on the Stress Evolution and Strengthening Support Timing of the Retracement Channel under the Super-Thick Nappe

Zhu,

Yue,

Gao

et al. 2023

Sustainability

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The superposition effect of the advanced support pressure of the working face in the final mining stage and the lateral support stress of the roadway is a key factor affecting the stability of the retracement channel. To study the stress evolution of the retracement channel under the super-thick nappe and the timing of strengthening support, this paper takes the mining of the 360808 working face in Xinji No. 1 Mine as the engineering background, analyzes the occurrence conditions of the working face and the measured rock pressure law, and constructs a roof structure model of the retreat area. The UDEC discrete element numerical simulation software was used to analyze the evolution characteristics of concentrated stress and the failure law of surrounding rock around the retracement channel under gradual excavation conditions. Based on the relationship between the position of the main roof fracture and the stability of the surrounding rock of the retracement channel, the instability mechanism of the surrounding rock of the retracement channel was revealed. A mechanical model of the surrounding rock of the retracement channel under the condition of a gradient coal pillar was established, and the energy criterion K for the instability of the surrounding rock was obtained. The method of adding anchor cables to strengthen the support of the surrounding rock of the retracement channel was proposed. The results indicate that the accumulation of energy in the surrounding rock of the retracement channel is greater than the internal consumption of energy, which is the direct reason for the instability of the surrounding rock of the retracement channel. The time to strengthen the support of the roof is when the working face is 15 m away from the retracement channel. According to the analysis of on-site monitoring results, the roof convergence and the two-sides convergence before and after strengthening the support were reduced by 90 mm and 140 mm, respectively. Under the strengthening of support, the slope of the retracement channel in the 360808 working face is slight, without roof fall, and the surrounding rock of the channel is effectively controlled, which is of great significance for ensuring the safe application of the retracement channel. It has reference value for the safety production of surrounding mines and is conducive to promoting the sustainable development of local resource-based society and economy.

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Study on Tamped Spherical Detonation-Induced Dynamic Responses of Rock and PMMA Through Mini-chemical Explosion Tests and a Four-Dimensional Lattice Spring Model

Cited by 37 publications

References 64 publications

Experimental Research on Energy Evolution of Sandstone with Different Moisture Content under Uniaxial Compression

Experimental Research on Energy Evolution of Sandstone with Different Moisture Content under Uniaxial Compression

A Semi-Analytical Model for Production Prediction of Deep CBM Wells Considering Gas-Water Two-Phase Flow

Study on the Stress Evolution and Strengthening Support Timing of the Retracement Channel under the Super-Thick Nappe

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