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首页> 外文期刊>Geoscience journal >Protection scope and gas extraction of the low-protective layer in a thin coal seam: lessons from the DaHe coalfield, China
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Protection scope and gas extraction of the low-protective layer in a thin coal seam: lessons from the DaHe coalfield, China

机译：薄煤层中低保护层的保护范围和气体提取：中国煤矿的课程

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摘要

Aiming at promoting thin coal seam pressure relief gas extraction, as well as delimiting the protection range of the low-protective layer in thin coal seam, in this paper, we simulated the changing process of the protective layer stress field and deformation field during the low-protective layer mining and obtained the characteristics of the displacement as well as the stress varied characteristics of the overlying strata in the low-protective layer mining. According to the protection layer mining stress relief and the deformation protection criterion, the tendency and trend of the protection layer protection scope were determined, and the theoretical calculation results were basically consistent with the direction protection angle of the protected coal seam. Taking the Dahe (DH) coalmine as an example, the floor rock roadway as the gas drainage roadway to extraction gas as well as the scheme of gas extraction and pressure relief in the upper and lower layers of the protective layer were implemented. The effect of gas control scheme showed that the working gas concentration reached the mining requirement. We finally established the low-protective layer in thin coal mining integrated technical scheme of protection scope and pressure relief gas extraction.
机译：旨在促进薄煤层减压气体提取，以及划定薄煤层中低保护层的保护范围，本文模拟了低温期间保护层应力场和变形场的变化过程 - 保护层挖掘并获得了位移的特性以及低保护层挖掘中覆盖层的应力变化特性。根据保护层挖掘应力浮雕和变形保护标准，确定保护层保护范围的趋势和趋势，理论计算结果与受保护煤层的方向保护角度一致。以DAHE（DH）煤矿为例，实施了作为燃气排水道路的地板岩路以及保护层的上层和下层中的气体提取和压力释放方案。气体控制方案的影响表明，工作气体浓度达到了采矿要求。我们终于在薄煤矿开采中建立了低保护层，保护范围和减压气体提取综合技术方案。

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