In situ fluidized mining and conversion solution to alleviate geological damage and greenhouse gas emissions due to coal exploitation: A numerical analysis and evaluation,Energy Science & Engineering

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In situ fluidized mining and conversion solution to alleviate geological damage and greenhouse gas emissions due to coal exploitation: A numerical analysis and evaluation
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-09-11 , DOI: 10.1002/ese3.812
Yang Ju _{1,

2} , Xiaodong Nie ₃ , Yan Zhu ₃ , Heping Xie ₄

Affiliation

Coal remains a primary energy source for the foreseeable future. However, existing approaches for coal exploitation and utilization are highly detrimental to the geological formations from which they are extracted and the atmospheric environment. Moreover, underground mining can induce earthquakes that lead to fatalities and financial losses. The demand to abandon coal mining is increasing worldwide, and the need for efficient, safe, and environmentally acceptable coal exploitation and utilization has garnered widespread attention. We propose a novel unmanned automatic machine‐based mining and in situ conversion method for the safe and clean exploitation and utilization of subsurface coal resources. Solid coal is transformed in situ into fluidized energy resources using this method. To evaluate its effectiveness, a geological model of a coal mine was generated, and a numerical simulation based on the continuum‐based discrete element method was conducted to compare the mining‐induced stress distribution, roof subsidence, coal wall failure, and microseismicity for fluidized and traditional mining methods. Our results indicate that the proposed mining method can significantly reduce damage to the geological formation and greenhouse gas emissions associated with the exploitation and utilization of coal resources. We also discuss the limitations of the current study and future research possibilities.

中文翻译：

原位流化开采和转化解决方案，以减轻煤炭开采造成的地质破坏和温室气体排放：数值分析和评估

在可预见的未来，煤炭仍然是主要能源。但是，现有的煤炭开采和利用方法对提取它们的地质构造和大气环境是非常有害的。此外，地下采矿会诱发地震，从而导致死亡和经济损失。在世界范围内，放弃煤矿开采的需求正在增长，对高效，安全和环境可接受的煤炭开采和利用的需求已引起广泛关注。我们提出了一种新型的无人值守的基于机器的自动采矿和原位转换方法，以安全，清洁地开采和利用地下煤炭资源。使用这种方法将原煤原位转化为流化能源。为了评估其有效性，建立了煤矿的地质模型，并基于连续体离散元方法进行了数值模拟，比较了流化方法和传统采矿方法的采矿诱发应力分布，顶板沉陷，煤壁破坏和微地震。我们的结果表明，提出的采矿方法可以显着减少与煤炭资源开发和利用相关的地质构造和温室气体排放的损害。我们还将讨论当前研究的局限性和未来的研究可能性。我们的结果表明，提出的采矿方法可以显着减少与煤炭资源开发和利用有关的地质构造和温室气体排放的损害。我们还将讨论当前研究的局限性和未来的研究可能性。我们的结果表明，提出的采矿方法可以显着减少与煤炭资源开发和利用相关的地质构造和温室气体排放的损害。我们还将讨论当前研究的局限性和未来的研究可能性。

更新日期：2020-09-11

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