Gas drainage from different mine areas: optimal placement of drainage systems for deep coal seams with high gas emissions
Gas drainage from different mine areas: optimal placement of drainage systems for deep coal seams with high gas emissions
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DOI：
10.1007/s40789-015-0061-6
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发表时间：
2015-05
影响因子：
8.3
通讯作者：
Ping Lu;Ping Li;Jian Chen;Chuijin Zhang;Junhua Xue;Tao Yu
中科院分区：
文献类型：
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作者：
Ping Lu;Ping Li;Jian Chen;Chuijin Zhang;Junhua Xue;Tao Yu
为控制瓦斯突出，研究开发了低透气性煤层卸压开采和无煤柱沿空留巷Y型通风抽放系统技术，并成功应用。但随着开采深度的增加，部分瓦斯抽放系统已不适用于高瓦斯涌出量矿井。由于较大的开采深度会引起较高的地应力，因此很难维护长的采空区侧巷道。巷道变形较大，不利于钻孔连续抽放瓦斯。针对这些问题，设计了顶板巷道Y型通风抽放系统，对抽放进行优化。该系统是在淮南诸暨煤矿11-2煤层瓦斯富集带分析的基础上设计的。在诸暨矿1112（1）盘区采用了分采区Y型瓦斯抽采方法。瓦斯绝对涌出量达116.3m3/min，平均流量69.1m3/min，平均抽放浓度近85%。采用Y型方法后，回风瓦斯浓度为0.15%~ 0.64%，平均为0.39%，通风量为2100-2750 m3/min，瓦斯管理系统运行良好，有效控制了瓦斯，保证了安全生产。
The techniques of stress relief mining in low-permeability coal seams and pillarless gob side retained roadway entry using Y-type ventilation and gas drainage systems were developed to control gas outbursts and applied successfully. However, as the mining depth increasing, parts of the gas drainage system are not suitable for mines with high gas emissions. Because larger mining depths cause higher ground stresses, it becomes extremely difficult to maintain long gob side roadways. The greater deformation suffered by the roadway is not favorable for borehole drilling for continuous gas drainage. To solve these problems, Y-type ventilation and gas drainage systems installed from a roof roadway were designed for drainage optimization. This system was designed based on a gas-enrichment zone analysis developed from mining the 11-2 coal seam in the Zhuji Mine at Huainan, Anhui Province, China. The method of Y-type gas extraction from different mine areas was applied to the panel 1112(1) in the Zhuji Mine. The absolute gas emission rate was up to 116.3 m3/min with an average flow of 69.1 m3/min at an average drainage concentration of nearly 85 %. After the Y-type method was adopted, the concentration of gas in the return air was 0.15 %–0.64 %, averaging 0.39 % with a ventilation rate of 2100–2750 m3/min. The gas management system proved to be efficient, and the effective gas control allowed safe production to continue.