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高瓦斯松软厚煤层大采高综放开采工作面为了满足通风、排水及瓦斯抽放的要求,采用内外双回路布置方式,即在开切眼及上下两巷的外侧平行布置进风顺槽-辅助切眼-瓦斯排放巷,两回路之间留设一定宽度的保护煤柱。在回采时,辅助切眼受到工作面矿压的影响,巷道收敛变形严重,维护难度大。通过对余吾煤业公司S2203大采高综放工作面辅助切眼现场实测,总结了巷道收敛变形规律,为采取有效的巷道设计、维护方式提供了参数和依据。
In order to meet the requirements of ventilation, drainage and gas drainage, double-circuit layout inside and outside is adopted, that is to say, the open air inlet is arranged parallel to the outside of the upper and lower two lanes, Auxiliary cut - gas discharge Lane, leaving a certain width between the two protection pillar. During the mining, the auxiliary cut-outs are affected by the rock pressure in the working face, the roadway converges and deforms seriously, and the maintenance is difficult. Through the on-site measurement of secondary cut face of S2203 high mining and fully mechanized caving mining face in Yuwu Coal Company, the law of roadway convergence and convergence was summarized, which provided the parameters and basis for effective tunnel design and maintenance.