School of Energy Science and Engineering, Henan Polytechnic University No. 5 Mine, Pingdingshan Tian, an Coal
Mining Corporation Ltd.

为了研究下保护层开采对上覆巷道的影响,以郭庄矿布置在3号煤层中的六西北二运输巷为研究对象,对其围岩变形破坏进行实测研究,结果表明:在下保护层开采的条件下,六西北二运输巷受到了其下方保护层9号煤层采动影响,根据巷道受影响的程度不同可分为初始采动影响区、采动影响剧烈区、采后影响区;巷道表面变形和围岩深部变形规律一致,最大变形速度区域位于工作面后方13—20 m;巷道底板破坏深度为7~8 m,且随着底板深度的减小,破坏程度加重;受影响的上覆巷道下沉量较大,累计下沉量1.1~1.4 m,此结论为相似条件下上覆巷道支护和加固提供科学依据。

In order to study the influence law of overlying roadway caused by lower protective seam mining, take the Liuxibeier Roadway of No.3 coal seam of Guo zhuang Mine as research object, the deformation of surrounding rock was measured. The results showed that the Liuxibeier Roadway was influenced by the No. 9 coal seam extraction under the specified condition of lower protective seam mining. According to the degree of roadway affected, roadway could be divided into three area d uring the mining period: initial influence area, intense influence area, post-mining influence area. The real deformation law of the roadway was in general accord with th e deep deformation law of the roadway. The largest deformation rate area was located in the range of 13- 20 m from the mining face. The damage depth of the roadwa y floor was about 7 ~ 8 m, and the degree of damage was worse with the shallow depth, the whole settlement amount of overlying coal roadway was comparatively larg e, and the accumulative covergence was about 1. 1 ~ 1. 4 m. The results would provide scientific basis for support and reinforcement of overlying coal roadway under t he similar condition.

国家自然科学基金面上基金资助项目(51274088)；