Extraction method for unloading gas in goaf bed separation zone of ultra-long working face
A technology for gas extraction and working face, which is applied in the fields of gas discharge, mining equipment, earth-moving drilling, etc. It can solve the problems of poor ventilation, increase the gas gushing source in the goaf, and stop the production of the working face, so as to achieve efficient drainage. The effect of controlling gas in goafs, avoiding endangering the health of employees, and solving the gas excess in the upper corner
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[0051] For the upper corner of the large-reserve and ultra-long fully mechanized mining face and the gas control plan in the goaf, it is proposed to adjust the layout of the mining roadway in the working face, from the traditional U-shaped ventilation to the W-shaped ventilation, relying on the arrangement in the goaf for pressure relief Drainage boreholes and drainage roadways in the annular fissure circle are used for gas drainage and utilization in the goaf, so as to achieve the purpose of safe, green and efficient management of gas in the upper corner of the working face and the goaf.
[0052] Such as figure 1 As shown, it is the structural representation of the "W" type ventilation system, the drainage borehole and the drainage roadway arranged by the drainage method in Embodiment 1 of the present invention (10 in the figure is the goaf, and 20 is the compaction area), in order to ensure Governance effects, specific implementation includes:
[0053] S1: For the ultra-lon...
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