78 hasil untuk "Linming Dou"
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Artikel Jurnal
Coal Burst Induced by Horizontal Section Mining of a Steeply Inclined, Extra-Thick Coal Seam and Its Prevention: A Case Study from Yaojie No. 3 Coal Mine, China
At present, coal bursts in working faces of steeply inclined coal seams (SICSs) have rarely been investigated, and current research focuses on the influences of roof breaking and instability of overlying structures in goaf on coal bursts; however, the stress state of coal masses in working faces…
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Artikel Jurnal
Effect of pre-confining pressure on unloading-induced coalburst: Insights from distinct element modelling
Coalburst is a violent dynamic failure of coal during underground mining. It is of significance to study failure pattern as well as energy evolution and transition during coalbursts and how they are influenced by pre-confinement. This paper presents unloading-induced coalburst simulations using the…
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Artikel Jurnal
Failure mechanism and control of coal bursts triggered by mining induced seismicity in steeply inclined and extra thick coal seam
With the increase in mining depth, coal bursts have become a major challenge in the safe mining of steeply inclined and extra thick coal seams (SIETCSs). Based on a typical mining induced seismicity triggered coal burst (MSTCB) in SIETCS, a large-scale numerical model was developed using the…
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Artikel Jurnal
Comprehensive early warning of rock burst utilizing microseismic multi-parameter indices
Rock bursts have become one of the most severe risks in underground coal mining and its early warning is an important component in the safety management. Microseismic (MS) monitoring is considered potentially as a powerful tool for the early warning of rock burst. In this study, an MS…
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Artikel Jurnal
Fault-Induced Coal Burst Mechanism under Mining-Induced Static and Dynamic Stresses
Fault is a common geological structure that has been revealed in the process of underground coal excavation and mining. The nature of its discontinuous structure controls the deformation, damage, and mechanics of the coal or rock mass. The interaction between this discontinuous structure and mining…
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Artikel Jurnal
Numerical Study on Failure Mechanisms of Shaft Wall Consisting of Steel Plate and Concrete under the Effects of Explosion
To enhance the antidynamic and static load resistance of reinforced concrete structures, the measure of covering steel plates on the inner surface of concrete structures arises, which has been rapidly developed and applied in civil engineering and other fields and has achieved a good performance. A…
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Artikel Jurnal
Mechanisms of Mining Seismicity under Large Scale Exploitation with Multikey Strata
The dynamic disasters are aggravating with the increase of exploitation scale and intensity in Chinese coal mines, to further understand this problem, we studied the mechanisms of mining tremors induced by key strata movement and instability under large scale exploitation. First the mechanisms were…
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Artikel Jurnal
Characteristics of Microseismic Waveforms Induced by Underground Destress Blasting: Comparison With Those Induced by Ground Blasting and Coal Mining
Some industrial activities in mines, such as underground coal mining, destress blasting for preventing rockburst, and ground blasting for mining, can cause microseismic occurrence. The microseismic waveform contains abundant information on the hypocenter and propagation path, which is valuable to…
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Artikel Jurnal Teks lengkap
Investigation of coal and gas outburst risk by microseismic monitoring
In order to improve the monitoring and prediction of coal and gas outburst, this paper proposes a new method for dynamic regional prediction of coal and gas outburst using microseismic (MS) monitoring. The theoretical basis of this method is presented. An index evaluation system was established and…
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Artikel Jurnal
Impact coal internal block size effect on physical and mechanical parameters’ similarity criteria validity: Numerical simulation and adjustment
Physical analog modeling is an effective approach for studying the hazards of coal bursts in coal similarity criteria for physical and mechanical parameters of the actual and similar materials are crucial to yield realistic results. The derivation of similarity criteria is predominantly based on…
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Artikel Jurnal
Statistical analysis of distribution patterns of coal seams in fold zones in Northwest China
The mechanisms for rock bursts occurrences in fold zones are complex, and the redistribution of in-situ stresses is closely related to the complexity of the structures. Analysis of the geomorphology of fold structures and changes of coal thickness can help identify zones prone to rock bursts to…
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Artikel Jurnal Teks lengkap
Numerical Investigation into the Mechanical Behaviours and Energy Characteristics of Hard Coal Subjected to Coupled Static-Dynamic Loads
In practical engineering, coal burst is usually caused by the combination of high geo-stress and dynamic loading. To study the dynamic response of coal in geo-stress conditions, numerical models of a coupled static–dynamic split Hopkinson pressure bar (SHPB) test system were established, based on…
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Artikel Jurnal
Investigating the destressing mechanism of roof deep-hole blasting for mitigating rock bursts in underground coal mines
Rock burst is one of the challenging problems restricting the safe and high-efficiency mining of deep-buried coal seams, and roof deep-hole blasting (RDHB) is commonly practiced in highly burst-prone zones in coal mines to control rock bursts. This research focuses on the interpretation of the…
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Artikel Jurnal
Rock burst mechanism analysis in an advanced segment of gob-side entry under different dip angles of the seam and prevention technology
In order to investigate the frequent occurrences of rock burst in gob-side entry during the mining process of the mining zone No. 7, the mechanical model of main roof of fully-mechanized caving mining before breaking was established by the Winkler foundation beam theory, and the stress evolution…
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Artikel Jurnal
Evaluation of the correlation between passive velocity tomography and mining seismic activity
Abstract Mining seismic activity is an important factor in assessing the risk of rockbursts in coal mines. In order to predict the mining seismic activity, this study uses qualitative and quantitative analysis methods to explore the correlation between passive velocity tomography and future seismic…
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Artikel Jurnal
Interpretable Tree‐Based Models for Predicting Short‐Term Rockburst Risk Considering Multiple Factors
ABSTRACT Rockbursts are typical dynamic disasters in underground coal mines. Their formation and occurrence are influenced by multiple factors, including geological conditions, mining disturbances, and microseismic activities. Machine learning models can support early warning by forecasting…
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Artikel Jurnal
Numerical Investigation of Damage Risks of Roadway Surrounding Rocks under Oblique Incident Dynamic Loads
In order to quantitatively demonstrate the damage risks of roadway surrounding rocks and meanwhile comprehensively consider stress states of surrounding rocks, an index to evaluate damage hazards was established based on Mohr-Coulomb strength criterion. Taking the track roadway of Longwall Panel…
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Artikel Jurnal
An investigation into coal burst process based on the stiffness variation of coal-rock system
The monitoring, early warning, and prevention of coal burst in underground coal mines have remained a worldwide challenge perplexing both academia and the mining industry, due to its inherent characteristics of process complexity, sudden occurrence, and diverse manifestation patterns. The…
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Artikel Jurnal
Risk assessment and mechanism of rock burst for deep soft coal roadways
Abstract The occurrence of rock burst is related to the physical properties of coal-bearing strata. Under the same mining conditions, the excavation of soft coal seams at 1000 m or deeper has a lower risk of rock burst. The characteristics of rock burst in soft coal seams include a small impact…