高强度超长推进距离工作面双巷布置沿空掘巷机理

Sequential extraction technology for high-intensity super-long two-entry longwall panels

  • 摘要: 为综合解决超长推进距离工作面双巷布置回采率低、二次采动巷道维护困难与沿空掘巷需要跳采等几个问题,提出了“一种超长推进距离工作面的沿空掘巷开采方法”,并确定了其应用的几个关键参数;采用理论分析与现场实测两种方法,确定在距采空区12 m的位置布置沿空掘巷,掘进工作面滞后本回采工作面距离不小于1 200 m,超前下一回采工作面不小于190 m,即可避免采-掘-采之间的相互干扰;结合实际工程背景条件下,确定原双巷布置留40 m煤柱,二次采动影响巷道会出现大变形与破坏,无法满足生产要求,而采用沿空掘巷技术在保证使用要求的前提下,单个工作面即可取得巨大的经济效益。研究结论可为具有类似地质与开采技术条件的矿井提供一定的借鉴。

     

    Abstract: The paper intends to comprehensively solve the problem of the low recovery rate of super-long two-entry longwall panels, difficulty maintenance of secondary mining roadway and need to jump in the gob-side entry.First of all, the patent put forward “A Gob-Side Entry Driving Method in Super-long Working Face”, and determined several key parameters.Secondly, the paper adopts the methods of theoretical analysis and field measurement to determines that the gob-side entry is arranged at a distance of 12 m away from the goaf.The distance of heading face behind the working face isn’t less than 1 200 m, and that ahead of the next face is not less than 190 m.The method can avoid mutual interference in the mining.Finally, under the conditions of actual engineering background, it determined the 40 m coal pillar in the original method and occurred large deformation in the secondary mining roadway, which can not meet the production requirements.If roadways use the roadway driving technology, it will be getting huge economic benefits.The conclusion can provide certain reference for the mine with similar geological and mining technology conditions.

     

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