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首页> 外文期刊>Natural Hazards >Gas outburst disasters and the mining technology of key protective seam in coal seam group in the Huainan coalfield
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Gas outburst disasters and the mining technology of key protective seam in coal seam group in the Huainan coalfield

机译：淮南煤田煤层群瓦斯突出灾害及重点保护层开采技术。

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摘要

Coal and gas outburst disasters in coal seams are becoming more serious as coal mines extend deeper underground in China. To aid gas control in high-gas outburst coal seam group, this study performed research based on the geological conditions of the Xinzhuangzi coal mine in the Huainan coalfield. The laws of gas occurrence, the strength of the coal outburst, and the regional partition were studied. Simultaneously, we introduced the key protective seam mining technology and confirmed the mining sequence of coal seam groups. The results indicate that (1) each seam absorbs gas well, and the currently measured gas content is up to 15.0 m(3)/t. (2) Although some differences about coal seams outburst intensity remain, the differences in the same group are very small. (3) The coal seam B10 was chosen as the key protective seam and was mined first; then adjacent seams were mined from bottom to top by layer within the roof of B10 and from top-to-bottom within the floor of B10 to guarantee each adjacent coal seam received the good effects of pressure-relief and increasing permeability. (4) The main methods of gas extraction in each protected seam are surface boreholes and net-like penetrating boreholes in the floor roadway, and related technical parameters were determined according to the degree of pressure-relief in coal seam. This in situ experiment indicates a method aiding the gas control problem and guaranteeing safe and highly efficient exploitation of high-gas outburst seams.
机译：随着煤矿在中国地下的扩展，煤层中的煤与瓦斯突出灾害变得越来越严重。为帮助控制高瓦斯突出煤层组瓦斯，本研究根据淮南煤田新庄子煤矿的地质条件进行了研究。研究了瓦斯发生规律，煤层突出强度和区域划分。同时，介绍了重点保护煤层开采技术，并确定了煤层群的开采顺序。结果表明：（1）每个煤层都很好地吸收了瓦斯，目前测得的瓦斯含量高达15.0 m（3）/ t。 （2）尽管煤层突出强度存在一定差异，但同一组差异很小。 （3）选择煤层B10作为重点保护层，首先进行开采;然后在B10顶板的顶部至底部以及B10底板的顶部至底部逐层开采相邻煤层，以确保每个相邻煤层都具有良好的卸压效果和增加的渗透性。 （4）各保护层瓦斯抽采的主要方法是底板巷道中的表层钻孔和网状贯穿钻孔，并根据煤层的卸压程度确定了相关的技术参数。该原位实验表明了一种解决瓦斯控制问题并确保安全高效开采高瓦斯突出煤层的方法。

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