极近距离跨采工作面合理布置及巷道支护技术

发布时间：2018-01-14 19:26

本文关键词：极近距离跨采工作面合理布置及巷道支护技术　出处：《煤矿安全》2016年12期 　论文类型：期刊论文

【摘要】：针对某矿22103工作面即将通过-413水平大巷顶板这一工程实际问题,为实现连续开采,决定采用跨采法通过底板巷道。采用理论分析的方法,估算出工作面与巷道的最小安全岩柱厚度为5.9 m。根据估算结果、底板大巷钻孔参数及工作面与底板巷道的空间位置关系,留设直角梯形状保护煤柱。跨采期间,按照大巷可能受到的采动影响,对底板巷道进行分段支护,并在巷道内设置监测点进行观察。结果表明:跨采阶段2条底板大巷围岩变形规律一致,不同分段处围岩变形量有差异,基本呈由中部向两端逐步递减趋势。顶板最大下沉量112 mm,巷道两帮最大移近量91 mm,均在可控范围内。
[Abstract]:In view of the practical problem that the roof of 22103 face of a certain mine is about to pass through -413 horizontal roadway, in order to realize the continuous mining, it is decided to adopt the method of cross mining to pass through the roadway of floor and adopt the method of theoretical analysis. The minimum safe rock column thickness of face and roadway is estimated to be 5.9 m. According to the estimated results, the borehole parameters of floor roadway and the spatial position relationship between working face and floor roadway are estimated. The coal pillar is protected by the right angle ladder shape. According to the influence that the roadway may be subjected to, the floor roadway is supported by sections during the span mining. Monitoring points are set up in the roadway. The results show that the deformation law of the surrounding rock of the two roadways is the same, and the deformation of the surrounding rock at different sections is different. The maximum subsidence of roof is 112 mm and the maximum of two sides of roadway is 91 mm, both of them are in controllable range.
【作者单位】：山东科技大学矿业与安全工程学院;
【分类号】：TD353
【正文快照】： 实际生产中,随着矿井开采的持续,工作面与巷道间的相对位置关系不断发生变化,最终导致矿井的个别工作面不得不布置在巷道的顶板或底板岩层中。为尽可能实现连续开采,减少工作面搬家次数,许多矿井采用跨巷开采技术[1-3]。跨采的关键在于保证工作面顶板或底板巷道的稳定性,防止

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