Geomechanical service in mining under gas-and-dynamic phenomena

Trubetskoy, K. N.; Iofis, M. A.; Esina, E. N.

doi:10.1134/s1062739115030114

Cited by 3 publications

(2 citation statements)

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“…It is still the main energy source that has been used to support the social and economic development of our country for a long time [1,2]. However, in the process of coal mining, spontaneous coal combustion, gas explosions, and coal mine dust-induced accidents often occur [3][4][5][6][7][8][9][10][11][12][13], which seriously affect the underground green environment, bring serious and fatal damage to the miners, and cause huge economic losses. In China, the most widely used technology to curb disasters from the source is coal seam water injection [14][15][16], which can effectively prevent the occurrence of coal mine accidents.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Application of Water Injection Process in Gas-Bearing Coal Seam

Lin,

Liu,

Geng

et al. 2023

Processes

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Coal seam pre-drainage technology is widely used to prevent and control gas in China’s high-gas coal seams, and upward drilling is a safe and reliable technology. Using the Luling Coal Mine as the study location, according to the actual situation of the site, a layer-through drilling process was proposed. Relying on a cross-layer extraction borehole, coal seam water injection efficiency extraction and high-efficiency water injection dust prevention can be performed in the later stage of borehole extraction, enabling one-hole multi-purpose and “gas-powder” integrated prevention and control. In order to study the “stress-seepage” coupling characteristics of the coal around the borehole, a numerical simulation of the coal seam water injection process was conducted. Based on the simulation results, a field test of water injection in coal seam upward drilling was performed. The field monitoring data show that the water injection and water content of the coal seam were increased by about 3.07 m3 and 0.69%, respectively, compared with the traditional water injection process. The water injection effect is remarkable, which is of great significance to ensure the safe and efficient production of the mine.

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Section: Introductionmentioning

confidence: 99%

Optimization and Application of Water Injection Process in Gas-Bearing Coal Seam

Lin,

Liu,

Geng

et al. 2023

Processes

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“…Only artisanal gold mining, which was developing and prospering during the USSR can be referred to in this regard.However, when Russia was introduced to the market economy in the 90s, it was believed that small mining and exploration enterprises would emerge and reach prosperity. K.N.Trubetskoy, Academy Fellow, pointed out in his report at the Parliament hearings in the State Duma in October 2001 that small mining business should play a special part in microentrepreneurship, "since it has a few specific features distinguishing it from other small enterprises" [1].…”

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confidence: 99%

Small mining and exploration enterprises in the Urals

et al. 2020

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Gas-dynamic roof fall during the potash deposits development

Baryakh

Andreiko

Fedoseev

2021

PMI

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In the development of practically all potash salt deposits, the study of gas-dynamic phenomena (GDP) is one of the most difficult tasks to ensure mining safety. Sudden salt and gas outbursts, dynamic breakdown, which are accompanied by intense gas release and possible broken rock carry-over into the mine workings, are associated with GDP. Geological preconditions for the GDP development are often the layered structure of the salt rock mass, the presence of interlayers and layers of salt clays. For the conditions of the Usolsky potash plant mine, complex studies of factors that characterize the possibility of gas-dynamic roof fall of the stoping rooms were carried out. In mine studies, free gases pressure and the initial velocity of gas release in the rocks of the roof workings were determined. The obtained experimental estimations were used as a parametric basis for mathematical modeling of geomechanical processes under conditions of a near-contact accumulation of free gas. The deformation of a layered salt mass produced by a room development system was described by the model of an ideal elastic-plastic medium with internal friction. The parabolic envelope of Mohr circles was used as a plasticity criterion in the compression area. In the numerical implementation, the deformation of clay contacts was modeled by Goodman contact elements. Based on the results of multivariate numerical calculations, it is established that the main factors determining the possibility of implementing GDP are the additional gas pressure at the contact, the width of the workingspan, and the distance from the roof to the first gas-containing contact. With multi-level lamination of roof rocks, there is a danger of large sources of GDP formation and the mechanism of successive fall of layers in an instant mode is implemented.

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Geomechanical service in mining under gas-and-dynamic phenomena

Cited by 3 publications

References 0 publications

Optimization and Application of Water Injection Process in Gas-Bearing Coal Seam

Optimization and Application of Water Injection Process in Gas-Bearing Coal Seam

Small mining and exploration enterprises in the Urals

Gas-dynamic roof fall during the potash deposits development

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