综放工作面过空巷技术研究及应用

发布时间：2018-10-20 07:58

【摘要】：针对综放工作面过空巷受到超前采动支承压力影响,造成空巷围岩塑性区和破碎区范围扩大,易引发大面积的冒顶和片帮的问题,采用FLAC3D软件对比分析了工作面回采过程中,在木垛支护、锚杆支护和高水充填材料充填3种支护方式下的空巷围岩稳定性,得到了3种支护方式下,围岩应力、巷道变形以及塑性区分布特征,最终确定高水材料充填为优选支护方式。基于不同水灰比高水充填材料的性质,确定了高水材料充填施工方案,并进行了综放工作面过空巷充填工业性试验。结果表明,过空巷期间工作面液压支架工作阻力仅增加3.5%,工作面过空巷后,压力恢复到正常值,未出现异常的矿压显现,充填过空巷效果良好。
[Abstract]:In view of the influence of the leading mining supporting pressure on the overpass roadway of fully mechanized caving face, which results in the enlargement of the plastic zone and the broken area of the surrounding rock of the goaf roadway, it is easy to cause the problem of large area roof fall and cover fall. The mining process of the working face is compared and analyzed by using FLAC3D software. The stability of the surrounding rock of the empty roadway under the three supporting modes of wood pile support, bolt support and high water filling material filling is obtained, and the distribution characteristics of surrounding rock stress, roadway deformation and plastic zone are obtained under the three kinds of support methods. Finally, it is determined that high-water material filling is the best supporting method. Based on the properties of high water filling material with different water-cement ratio, the construction scheme of high water material filling is determined, and the industrial test of filling through goaf roadway in fully mechanized caving face is carried out. The results show that the working resistance of hydraulic support only increases by 3.5 in the period of passing through the roadway, the pressure recovers to the normal value after the working face passes through the goaf, no abnormal rock pressure appears, and the effect of filling through the goaf roadway is good.
【作者单位】：江苏博厦矿山科技有限公司;中国矿业大学煤炭资源与安全开采国家重点实验室;
【基金】：国家自然科学基金青年基金资助项目(51504246)
【分类号】：TD353

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