Robotic complex for the development of thick steeply-inclined coal seams and ore deposits

Nikitenko, M. S.; Malakhov, Yu. V.; Neogi, Biswarup; Chakraborty, Pritam; Banerjee, Dipesu

doi:10.1088/1755-1315/84/1/012002

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…The dip angle of coal seam is generally 45−90°, and efficient extraction from these seams is very challenging. 52,53 Restricted by the conditions of the coal seam, the current mining is mostly small mines with low mechanization and low output and some mines still adopt blasting mining technology. The worse situation is that gas control is at a much greater difficulty than in gently inclined coal seam.…”

Section: Introductionmentioning

confidence: 99%

“…Steeply inclined coal seams are widely distributed in western and southwestern China and other countries including United States, Russia, Australia, Germany, India, the Czech Republic, and others. − Because of the technical complexity, United States and other western countries avoid mining these inclined seams, while Russia used it as a technical reserve to carry out a small amount of research and test. , In Western China, it is estimated as accounting for 17% of the proven coal reserves and 10% of the annual production from steeply inclined multicoal seams. The dip angle of coal seam is generally 45–90°, and efficient extraction from these seams is very challenging. , Restricted by the conditions of the coal seam, the current mining is mostly small mines with low mechanization and low output and some mines still adopt blasting mining technology. The worse situation is that gas control is at a much greater difficulty than in gently inclined coal seam. , However, mining in steep coal seams is running well in western China since there is high-quality coal and high economic value.…”

Section: Introductionmentioning

confidence: 99%

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CO₂ Gas Fracturing in High Dip Angled Coal Seams for Improved Gas Drainage Efficiency at Hashatu Coal Mine

et al. 2022

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Effective gas drainage for the gassy coal seam is a technological measure to prevent excessive gas outing and gas related mine hazards. CO2 gas fracturing (CO2-Frac) is a new technology for coal mine gas control, and its effectiveness has been proven from many coal fields across China. CO2-Frac has been successfully implemented for gas drainage in single gently inclined coal seam, but it has not been experimented in steeply inclined multicoal seam. In this study, a pilot CO2-Frac project was carried out in Hashatu coal mine, a steeply inclined multicoal seam formation. To attain an effective gas drainage, three different types of CO2- Frac boreholes were drilled and experimented for a long-period gas drainage. One borehole type is the penetrating borehole through two seams, and other two types of in-seam boreholes include strike borehole and up-dipping borehole. With continuous field gas drainage and observation results, the gas drainage efficiency was found to be significantly improved in in-seam borehole and penetration borehole with CO2 fracturing, and the maximum methane flow rate increased 2.4 times for a given borehole length and the efficient drainage radius increased 3–4 times. In addition, the drainage effect of original drainage boreholes within the CO2-Frac circle influenced region was also significantly improved due to the borehole interference. The fractures radius of CO2-Frac in the penetrating borehole was larger than the two types of in-seam boreholes in the steeply inclined seam formation. This may be closely related to the developing property of bedding and cleat system in coal seam. This study provides both theoretical and practical evidence for effectiveness CO2-Frac in the area with steeply inclined angle and multicoal seam formations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CO₂ Gas Fracturing in High Dip Angled Coal Seams for Improved Gas Drainage Efficiency at Hashatu Coal Mine

et al. 2022

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Investigation of the usability of robots in mining operations

Külekçi

Ünker

2022

EJOSAT

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With the developing technology, mobile robots have made impressive progress in various fields. Mines, one of the most tiring and potentially dangerous working environments for humanity, will be affected by this advance of mobile robots. Namely, with the robots that can replace the underground personnel in the mining sector, occupational accidents and costs can be significantly reduced. In disaster situations, rescue robots can help locate missing personnel. Unmanned machines operated only by robots do not endanger human life in any way. In this study, it is aimed to solve the balance problem in robots that can be produced for rescue, mapping or active working in underground mines. It is aimed that the robots to be produced using the new generation gyroscope will remain in balance under all conditions and be able to perform the given task in a healthy way.

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Research on Stability Control of Shields at Working Face with Large Dip Angle

Shi,

Wang

2023

Energies

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Coal is the main energy source in China. As flat and shallow coal seams are being depleted, adverse coal seams such as inclined and steeply inclined coal seams account for larger proportion of seams that are mined. For these coal seams, instability such as slip and tipping of mining equipment due to the large inclination is a significant challenge for the productive operation of intelligent or smart mines. Therefore, this paper serves to provide some insights into improving their stability. In this paper, research on the anti-tipping and anti-slip technology of shields is carried out on an intelligent working face with a large dip angle. A mechanical model of “support-surrounding rock” was established. Through the analysis of the influence of the self-weight of the support on its stability and through theoretical analysis and field practice, it was found that the critical tipping angle of the support in the free state is 27.8, the critical slip angle is 16, and the support is more prone to slip in the free state; the shields in the middle of the working face are the key area for stability control. Suitable technical measures are taken to ensure the stability of the supports, which provides the management and practical basis for safe and efficient mining in the intelligent working face with a large dip angle.

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Robotic complex for the development of thick steeply-inclined coal seams and ore deposits

Cited by 4 publications

References 3 publications

CO₂ Gas Fracturing in High Dip Angled Coal Seams for Improved Gas Drainage Efficiency at Hashatu Coal Mine

CO₂ Gas Fracturing in High Dip Angled Coal Seams for Improved Gas Drainage Efficiency at Hashatu Coal Mine

Investigation of the usability of robots in mining operations

Research on Stability Control of Shields at Working Face with Large Dip Angle

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Robotic complex for the development of thick steeply-inclined coal seams and ore deposits

Cited by 4 publications

References 3 publications

CO2 Gas Fracturing in High Dip Angled Coal Seams for Improved Gas Drainage Efficiency at Hashatu Coal Mine

CO2 Gas Fracturing in High Dip Angled Coal Seams for Improved Gas Drainage Efficiency at Hashatu Coal Mine

Investigation of the usability of robots in mining operations

Research on Stability Control of Shields at Working Face with Large Dip Angle

Contact Info

Product

Resources

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CO₂ Gas Fracturing in High Dip Angled Coal Seams for Improved Gas Drainage Efficiency at Hashatu Coal Mine

CO₂ Gas Fracturing in High Dip Angled Coal Seams for Improved Gas Drainage Efficiency at Hashatu Coal Mine