Characteristics of Valuable Microseismic Events in Heading Face of an Underground Coal Mine Using Microseismic System

Zhang, Wenlong; Huo, Tianhong; Li, Chen; Wang, Cunwen; Qu, Xiaohui; Xin, Chongwei

doi:10.1155/2021/6683238

Cited by 11 publications

(9 citation statements)

References 38 publications

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“…Guo [10] proposed a firstarrival picking method of effective signals for microseismic monitoring based on UNet++ network, which can significantly improve the accuracy and efficiency of microseismic time-difference source location. Zhang [11] studied the basic characteristics of MS events in heading face based on a running vibration signal acquisition system, including the occurrence position, main frequency range, maximum amplitude (MA) range, event duration, and relationship with geological structure. Ma et al [12] studied the fracture and instability of rocks by analyzing the microseismic signals.…”

Section: Introductionmentioning

confidence: 99%

Research on Temporal and Spatial Distribution Characteristics of Microseismic Events of Slip-Type Rockburst

Xu¹,

Song

Song³

et al. 2022

Shock and Vibration

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Based on the microseismic monitoring data of underground cavern of Shuangjiangkou Hydropower Station, the internal relationship between rockburst and microseismic events is analyzed and the occurrence mechanism of slip-type rockburst in underground cavern of Shuangjiangkou Hydropower Station is analyzed through the change of microseismic monitoring b value to warn the risk level of rockburst. The results show that microseismic events are closely related to excavation activities, and the change of b value reflects the rockburst risk level. The smaller the b value of microseismic events is, the more large magnitude events is and the greater the possibility of rockburst is. The slip-type rockburst was mainly affected by structural plane; it is due to the accumulation of elastic strain energy at the structural plane and the sudden release under the action of unloading or disturbance, driving the block on the structure surface fast slide, mainly manifested as the sliding of large blocks of surrounding rock, and forming a “V” shape pit blasting or cuneate blasting crater, as well as destruction with crackle. Compared with the strained rockburst, the damage is more serious. The research results can provide reference for rockburst prediction and prevention in similar deep rock engineering.

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Section: Introductionmentioning

confidence: 99%

Research on Temporal and Spatial Distribution Characteristics of Microseismic Events of Slip-Type Rockburst

Xu¹,

Song

Song³

et al. 2022

Shock and Vibration

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“…Numerical simulation of roadway without support, original roadway support, and new truss structure support three forms. In the study of microseismic events and numerical simulation of rock burst mechanism in underground coal mine roadway, some inspirations have been obtained from the article [19,20].…”

Section: Numerical Simulation Analysismentioning

confidence: 99%

Research on Stress Distribution Characteristics for Uniquely Shaped Roadway with Hard Roof in Steeply Inclined Coal Seam and Support Technology of Reducing Vibration Impact

Zhang

Hui

Shi

et al. 2021

Shock and Vibration

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This paper presents a comprehensive study of the stress distribution and stability analysis of a uniquely shaped roadway having a steeply dipping hard roof. The coal seam and its roof have a certain impact tendency, which is the internal condition of rock burst. The syncline tectonic stress causes the original rock stress to reach a higher level. The large amount of coal produced in the coal mine and the large movement range of the upper strata cause the huge mining additional stress around the stope. The impact load caused by “cantilever beam” fracture of hard roof can induce and strengthen rock burst. Its engineering geological setting encompasses the mining process and surrounding rock conditions of No. 6 Coal Seam in the 2130 coal mine of Xinjiang. Numerical simulations with theoretical analysis and field measurements investigated a proposed new truss combined support scheme for implementation. A comparison was made of the differences in the state parameters of the road under the new and old support conditions. The application of the new combined support technology changed the form of the stress distribution around the road. Apart from the displacements of the two coal sidewalls, the new support system notably reduced the displacement of roof and floor by 67.8% and 83.6%, respectively. After the implementation of the new support scheme, the frequency of the original rock burst in the working face is greatly reduced, the surrounding rock control and field application effects also remained good, and personnel and equipment safety and production plan have a good guarantee.

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“…At present, research on rock bursts mainly focuses on their occurrence mechanism [ 9 ], monitoring methods [ 10 , 11 ], early warning indicators [ 10 ] and treatment measures [ 9 , 12 ]. Among the above, the occurrence mechanisms should be studied clearly first, to form the basis of follow-up monitoring, early warning and treatment measures.…”

Section: Introductionmentioning

confidence: 99%

The Revealed Mechanism of Rock Burst Based on an Innovative Calculation Method of Rock Mass Released Energy

Zhang

Feng

Shi

2022

IJERPH

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It is very necessary to study the mechanism of rock burst, which is related to the safe construction of many geotechnical projects. Previous studies have shown that small trigger stress will lead to large energy release, but the specific conditions that cause the release and how to quantify the energy are urgent problems to be solved. In this study, an innovative calculation method of rock mass energy release is proposed, and the calculated release energy is consistent with the monitoring results of field monitoring equipment. The revealed mechanism of rock burst reflected is that under the condition of a large-ratio pre-state stress field (mostly > 2.5), a small trigger stress field will lead to a large amount of energy release under “late butterfly shape” or “final butterfly shape” of the plastic zone. This study reveals the key factor of rock burst, which plays an important reference role for the mechanism research, subsequent monitoring and treatment method of rock burst.

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Characteristics of Valuable Microseismic Events in Heading Face of an Underground Coal Mine Using Microseismic System

Cited by 11 publications

References 38 publications

Research on Temporal and Spatial Distribution Characteristics of Microseismic Events of Slip-Type Rockburst

Research on Temporal and Spatial Distribution Characteristics of Microseismic Events of Slip-Type Rockburst

Research on Stress Distribution Characteristics for Uniquely Shaped Roadway with Hard Roof in Steeply Inclined Coal Seam and Support Technology of Reducing Vibration Impact

The Revealed Mechanism of Rock Burst Based on an Innovative Calculation Method of Rock Mass Released Energy

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