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为解决厚煤层错层位巷道布置下夹矸对顶煤冒放性的影响问题,采用理论推导和数值模拟的方法,研究在错层位巷道布置下工作面支承压力对夹矸破坏程度的影响以及夹矸对顶煤冒放性的影响导致顶煤冒放的难易程度.结果表明:厚煤层错层位巷道布置取消了区段保护煤柱,首采工作面和接续工作工作面连接成整体.随着接续工作面的不断增加导致发挥作用的关键层位置提高,使工作面支承压力增大,同时使夹矸的承载增大.与传统巷道布置相比,错层位巷道布置下工作面支承压力对夹矸破坏剧烈,夹矸破坏充分,顶煤冒放性较易,进一步推出错层位巷道布置下煤层中夹矸的断裂步距缩小,煤层中夹矸的临界厚度增大.
In order to solve the problem of the effect of clip gangue on the runoff discharge of coal under staggered roadway in thick coal seam, the influence of the bearing pressure on the fracture gangue under the staggered roadway layout was studied by theoretical derivation and numerical simulation As well as the difficulty of the top coal being released due to the influence of the clip gangue on the top coal.The results show that the coal pillar in the section is canceled in the staggered roadway in thick coal seam and the first mining face and the continuous working face are connected Overall, with the continuous increase of the working surface, the key layer that plays a role in improving the position will increase the support pressure of the working face and increase the bearing capacity of the saddle.Compared with the traditional roadway arrangement, Surface support pressure on the gangue fierce destruction, full of gangue destruction, top coal caving more easy to further launch the wrong layer of roadway arrangement of coal gangue in the fracture step to reduce the narrow seam coal seam in the critical thickness increases.