coal mining gradient
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coal mining gradient

Risk precontrol continuum and risk gradient control

2019-9-1  The idea of risk gradient control can be implemented in coal mining. In the framework of risk gradient control, the hazard pre-arranged plan, hidden danger pre-arranged plan, and the emergency pre-arranged plan are developed according to different risks, and once risk emerges, the corresponding pre-arranged plans are translated into actual risk control measures.

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Risk precontrol continuum and risk gradient control

Underground coal mining is recognized all over the world as one of the riskiest industrial operations. To improve the safety management model in underground coal mines from passive management to active management, the risk precontrol continuum and risk gradient control in underground coal mining are proposed in this paper.

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Combining SAR interferometric phase and intensity ...

2020-4-9  Coal mining usually causes drastic large gradient deformation in the earth’s surface in a short period, which leads to the formation of collapse basin or collapse pit. The drastic

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Bacterial community responses to a gradient of

2014-12-12  Here we examine stream bacteria composition and diversity along a strong chemical gradient in Central Appalachian streams. Coal mining in the region generates alkaline mine

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Effects of temperature gradient and particle size on

2019-9-4  The supercriticality or subcriticality of the coal is assessed using a non-dimensional index IHR based on the temperature gradient at the temperature cross-point between coal and ambient temperatures for coal piles with various volumes and particle sizes.

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Effect of Underground Coal Mining on Slope

2019-10-31  Underground coal mining can inevitably cause large-scale surrounding rock movement, which would transfer to the surface layer by layer with the advance of coal mining [7, 8], resulting in changes in surface morphology, including slope gradient and slope length, and eventually they are displayed in the way of subsidence, which would lead to changes in physical and chemical properties

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Effect of Electric Potential Gradient on Methane ...

2020-9-22  gradient, which is the best modification condition to decrease the amount of methane adsorbed on lean coal. The Langmuir constant P L varied in the same trend with the potential gradient (listed in Table 1). P L can be used to evaluate the affinity of coal to methane and the ability of methane desorption under reservoir pressure.20,21 The experimental

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How Does Mining Salinisation Gradient Affect the

2020-8-22  The hard coal mining process is inseparably connected with the production of huge amounts of saline underground water that contains high loads of TDS, sulphates and hardness and inflow into the surface and ground waters and contaminate them.

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Research on Surface Deformation of Ordos Coal Mining

2021-4-2  In coal mining areas, due to problems such as the surface coherence, large deformation gradient on the central surface, and unwrapping problems, asingleInSARmethodcanhardlyobtainacontinuousdefor- mation map of the mining area.

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Coal‐mining intensity influences species and trait ...

2021-2-23  Coal mining dramatically alters landscape-level topography, geology and land cover, with consequences for the watershed processes that deliver inputs to streams. Changes in water quantity inputs (flow regime) are complex but often manifest as increased frequency and magnitude of floods.

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Bacterial community responses to a gradient of

Here we examine stream bacteria composition and diversity along a strong chemical gradient in Central Appalachian streams. Coal mining in the region generates alkaline mine drainage (AlkMD), causing dramatic increases in conductivity, alkalinity, sulfate and metals sufficient to degrade stream macrobiota communities throughout the ecoregion.

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(PDF) Effect of Underground Coal Mining on Slope ...

natural slope gradient caused by underground coal mining is. shown in Figure 6. No matter the size of natural slope. gradient, mining would cause the increase of slope gradient,

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China University of Mining and Technology - Gradient

2021-3-3  Gradient principal of horizontal stress inducing rock burst in coal mine 作者: 发布时间:2021-03-03 浏览次数: 如果您无法在线浏览此 PDF 文件,则可以 下载免费小巧的 福昕(Foxit) PDF 阅读器,安装后即可在线浏览 或 ...

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Bacterial community responses to a gradient of

2014-12-12  Here we examine stream bacteria composition and diversity along a strong chemical gradient in Central Appalachian streams. Coal mining in the

More

Effect of Electric Potential Gradient on Methane ...

2020-9-22  Effect of Electric Potential Gradient on Methane Adsorption and Desorption Behaviors in Lean Coal by Electrochemical Modification: Implications for Coalbed Methane Development of Dongqu Mining, China Guanxian Kang, Tianhe Kang,* Junqing Guo, Jianting Kang, Runxu Zhang, Xiaoyu Zhang, Guofei Zhao, Bin Zhang, Ligong Li, and Liankun Zhang

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Tree responses to foliar dust deposition and gradient

2020-10-16  The amount of dust deposited on plant leaves showed a decreasing gradient at increasing distances from the coal mining areas except F. religiosa, F. benghalensis and B. monosperma which showed similar dust loading during summer at different sites (Fig. 3A). CIMFR, the reference site, showed the least dust deposition during all the seasons.

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Research on Surface Deformation of Ordos Coal Mining

2021-4-2  Underground mining in coal mining areas will induce large-scale, large-gradient surface deformation, threatening the safety of people’s lives and property in nearby areas. Due to mining-related subsidence is characterized by fast displacement and high

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Recognised Standard 19 - Design and construction of

2019-8-21  Coal Mining Safety and Health Act 1999 . Recognised standard 19 Design and construction of mine roads 2 Recognised Standards may be updated from time to time. ... The gradient on a ramp is the grade line profile along the road centre line. It is measured from the

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Optimising a production plan for underground coal

Downloadable (with restrictions)! Developing an optimal production plan of an underground coal mine is complex due to several factors such as: economic, physical, environmental and social, etc. In this paper, an attempt has been made to apply genetic algorithm (GA) to maximise net present value (NPV) of a real life underground coal mine. It is first highlighted that the inefficacy of using ...

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Mine Planning PDF Coal Mining Mining

2020-8-3  coal mining methods • underground ... parameter continuous miner/ side discharge long- wall bolter miner/ load loader haul dumper gradient flatter than 1 in 6 upto 1 in 4 upto 1 in 2 seam 1.5 m to 5 m 1.5 m to 5 m 1.5m to 6m thickness faulted may be used

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China University of Mining and Technology - Gradient

2021-3-3  Gradient principal of horizontal stress inducing rock burst in coal mine 作者: 发布时间:2021-03-03 浏览次数: 如果您无法在线浏览此 PDF 文件,则可以 下载免费小巧的 福昕(Foxit) PDF 阅读器,安装后即可在线浏览 或 ...

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Effect of Electric Potential Gradient on Methane ...

2020-9-22  Effect of Electric Potential Gradient on Methane Adsorption and Desorption Behaviors in Lean Coal by Electrochemical Modification: Implications for Coalbed Methane Development of Dongqu Mining, China Guanxian Kang, Tianhe Kang,* Junqing Guo, Jianting Kang, Runxu Zhang, Xiaoyu Zhang, Guofei Zhao, Bin Zhang, Ligong Li, and Liankun Zhang

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pH Gradient-Induced Heterogeneity of Fe(III)-Reducing ...

2021-2-3  pH Gradient-Induced Heterogeneity of Fe(III)-Reducing Microorganisms in Coal Mining-Associated Lake Sediments. Marco Blöthe, Denise M. Akob, Joel E. Kostka, Kathrin Göschel, Harold L. Drake and ; Kirsten Küsel

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Combining SAR interferometric phase and intensity ...

2018-6-10  Coal mining usually causes drastic large gradient deformation in the earth's surface in a short period, which leads to the formation of collapse basin or collapse pit. The drastic deformation renders the generation of dense fringes in interferogram, leading to difficulties in the phase unwrapping step.

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pH Gradient-Induced Heterogeneity of Fe(III)-Reducing ...

2007-12-14  Nonetheless, coal mining-associated lake sediments appear to be a more suitable habitat for A. ferrooxidans due to their moderately acidophilic nature . Large amounts of amorphous Fe(OH) 3, goethite, and Fe(III) oxyhydroxysulfates, like schwertmannite or jarosite, precipitate to the sediments of coal mining-associated lakes (43, 59).

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Research on Mining Engineering with Dual Gradient High ...

In this paper, it will take in-depth research, site practical methods, and provide reasonable solutions to several key problems, such as conveyor and hydraulic support sliding;shearers badly sloped;the roof management of return airway when the working face lengthened;dealing with the upper corner gas;gangue fleeing;turn mining,which seriously affect production during high ...

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Recognised Standard 19 - Design and construction of

2019-8-21  Coal Mining Safety and Health Act 1999 . Recognised standard 19 Design and construction of mine roads 2 Recognised Standards may be updated from time to time. ... The gradient on a ramp is the grade line profile along the road centre line. It is measured from the

More

Optimising a production plan for underground coal mining ...

Downloadable (with restrictions)! Developing an optimal production plan of an underground coal mine is complex due to several factors such as: economic, physical, environmental and social, etc. In this paper, an attempt has been made to apply genetic algorithm (GA) to maximise net present value (NPV) of a real life underground coal mine. It is first highlighted that the inefficacy of using ...

More

Mine Planning PDF Coal Mining Mining

2020-8-3  coal mining methods • underground ... parameter continuous miner/ side discharge long- wall bolter miner/ load loader haul dumper gradient flatter than 1 in 6 upto 1 in 4 upto 1 in 2 seam 1.5 m to 5 m 1.5 m to 5 m 1.5m to 6m thickness faulted may be used

More

Mine Planning Design Coal Mining Mining

2021-7-3  COAL MINE PLANNING DESIGN-A.V.REDDY, ADDL.MANAGER The Singareni Collieries Company Limited Mining Methods Generally Coal is being mined by two main methods 1. Surface or Opencast mining 2. Underground mining. The choice of method is largely determined by the depth, thickness and no. of coal seams, geology of the coal deposit and other factors. ...

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