Research on the Disaster‐Inducing Mechanism of Coal‐Gas Outburst

Nie, Fengxiang; Wang, Honglei; Qiu, Liming

doi:10.1155/2020/1052618

Cited by 8 publications

(5 citation statements)

References 38 publications

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“…The research from Guo et al [14] believed that the prominent influencing factors changed from three to four, that is, the tectonic stress field, the physical and mechanical properties of tectonic coal, coal seam gas, and structural combination characteristics. The influence of tectonic, geostatic, and mining stresses on coal and gas outbursts (CGO) becomes more obvious with increasing mining depth [15][16][17][18]. Liu et al [19] established a mechanical analysis model of the expansion and evolution of the plastic zone in front of the driving face by numerical simulation method, analyzed the characteristics of the expansion and evolution of the plastic zone in front of the driving face, and discussed the physical and mechanical process and basic conditions of the development of coal and gas explosion caused by the evolution of the plastic zone.…”

Section: Introductionmentioning

confidence: 99%

Coal and Gas Outburst Affected by Law of Small Fault Instability during Working Face Advance

et al. 2020

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To analyze the effect of small faults in the working face on coal and gas outbursts, the coal and gas outburst accident in the 21431 working face was studied with the 3DEC numerical simulation method, and the main research contents were the change laws of both stresses at the small fault and the overburden strata movement rate in the small fault zone of which the drop height and the strike were designed into different groups. The results show that the risk of small fault slip increases with the advancing working face. In addition, there is a positive correlation between the risk and the small fault throw. The movement rate of overburden strata in the small fault zone increases along with the rising of the small fault throw, which increases the energy transferred to the coal seam from the surrounding rock under the effect of the small fault. Hence, the effect of small faults on the working face on coal and gas outbursts was positively correlated with the small fault throw. Under the influence of a small fault strike, the closer it is to the small fault along the dip distance at the same working face, the greater the risk will be of a coal and gas outburst. And the bigger the small fault strike is, the greater is the stress concentration degree in front of the working face and the more the elastic energy is stored and the greater is the possibility of an outburst. The paper analyzes the influence of small faults on coal and gas outbursts in the working face, which has reference significance for the prediction and prevention of coal and gas outburst disaster in the working face.

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Section: Introductionmentioning

confidence: 99%

Coal and Gas Outburst Affected by Law of Small Fault Instability during Working Face Advance

et al. 2020

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“…The gas content of coal seams increases with depth [ 35 ], and gas disasters are more likely to occur at greater depths [ 36 ]. Wang L [ 37 , 38 ] proposed the use of soft protective layer extraction and first mining layer transformation using the hydraulic fracturing method to control deep mine gas.…”

Section: Introductionmentioning

confidence: 99%

Controlled reconstruction and application research of lateral overlying strata structure in high-gas mines with thick-hard roofs for a fully-mechanized top-caving face

Chang,

Wang,

Qin

et al. 2024

Heliyon

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“…Te demand for coal is increasing, and the mining depth is increasing with the world economy's continuous development; the coal seam gas content and ground stress are increasing; the coal seam permeability is decreasing; and the difculty of gas drainage is increasing [1][2][3]. Te existing coal seam antirefection technologies include deep hole blasting [4], hydraulic fracturing [5,6], and low-temperature freezing, mainly.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Damage Characteristics and Early Warning of Frozen Coal under Uniaxial Compression

Sun

Liu

Dong

et al. 2023

Advances in Materials Science and Engineering

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This article conducted acoustic emission tests of natural coal, natural frozen coal, and saturated frozen coal to explore the damage characteristics of frozen coal and in view of the frozen coal damage early warning problems and explored the strength deformation and acoustic emission characteristics of coal samples. The test results showed that the compressive strength of the frozen coal samples decreased significantly, and the strength of the saturated frozen coal samples was the lowest; more acoustic emissions were generated at the initial loading stage. The damage parameters were defined using the acoustic emission parameters. The damage characteristics of the coal samples were analyzed. The damage model of the coal samples was established based on the power function. The early warning parameter VAEi to analyze the evolution characteristics of the variance curve was proposed; the sudden jump point b of VAEi from the stable development stage to the rapid growth stage was defined as a general early warning point; the endpoint point c of the parameter rapid growth stage was defined as a key early warning point; a zonal and hierarchical early warning was finally proposed.

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Research on the Disaster‐Inducing Mechanism of Coal‐Gas Outburst

Cited by 8 publications

References 38 publications

Coal and Gas Outburst Affected by Law of Small Fault Instability during Working Face Advance

Coal and Gas Outburst Affected by Law of Small Fault Instability during Working Face Advance

Controlled reconstruction and application research of lateral overlying strata structure in high-gas mines with thick-hard roofs for a fully-mechanized top-caving face

Experimental Investigation on Damage Characteristics and Early Warning of Frozen Coal under Uniaxial Compression

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