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为揭示混凝土填充墙支护下综采沿空回采巷道矿压显现规律,有效控制围岩变形,根据某矿综采面地质与开采条件,应用数值计算方法研究采后留巷的稳定性。数据分析显示:混凝土墙支护下沿空留巷围岩应力随采煤工作面推进呈周期性变化,采后20 m范围的巷道围岩来压较剧烈,是重点支护区域;巷道围岩位移量随采煤工作面的推进而增大,其中巷帮移近量较小,而顶板下沉量较大,表明采用混凝土墙支护沿空留巷有利于巷帮的稳定,但不利于顶板稳定。
In order to reveal the regularity of underground pressure in fully mechanized coal mining roadway supported by concrete filled wall and effectively control the deformation of surrounding rock, according to the geology and mining conditions of a fully mechanized coal mining face, the stability of the retained roadway after mining is studied by numerical method. The data analysis shows that the surrounding rock stress of gob-side entry retaining road under the support of concrete wall changes cyclically with the advancement of coal mining face, and the surrounding rock of the roadway within 20 m after the mining is more intense and is the key supporting area; The displacement increases with the advancement of coalface, in which the displacement of the alley is smaller and the amount of roof subsidence is larger, which shows that the support of gob-side entry with concrete wall is beneficial to the stability of alley but not conducive to Roof stable.