浅埋深工作面支架与顶板的动态相互作用研究

发布时间：2018-01-27 13:23

本文关键词： 顶板下沉支架适应性活柱伸缩量支架围岩关系支架让压能力　出处：《煤炭学报》2016年08期 　论文类型：期刊论文

【摘要】：以榆家梁煤矿44305工作面支架活柱伸缩量实测数据为基础,同时对比支架工作阻力监测数据,从工作面顶板下沉特征(周期下沉与循环下沉)及支架让压能力2方面研究了支架与顶板的动态相互作用。结果表明,割煤移架使得"支架-顶板"组成的稳定支撑系统失去平衡,造成移架后在形成新的稳定支撑系统前发生了顶板循环下沉与支架增阻;顶板循环下沉在其运动周期内累积形成周期下沉;44305工作面顶板周期下沉量200~300 mm,最大可达462 mm,下沉速度为40~60 mm/h,循环下沉量约30 mm,最大可达52 mm;支架活柱伸缩余量是评价支架让压能力的重要指标,44305工作面回采期间应控制最低采高,确保支架活柱伸缩余量在300 mm左右,避免长时间在较低支撑高度工作,减小切顶压架风险。
[Abstract]:The dynamic interaction between the support and the top plate is studied on the basis of the measured data of the telescopic quantity of the support column of the 44305 working face of Yujiliang coal mine . The dynamic interaction between the support and the top plate is studied in terms of the subsidence characteristics of the top plate of the working face ( cycle subsidence and cyclic subsidence ) and the pressure capability of the support . The results show that the coal cutting moving frame causes the roof circulation subsidence and the support increasing resistance to occur before the new stable supporting system is formed . The subsidence rate of the top plate of the roof is 200 - 300 mm , the maximum is 462 mm , the subsidence speed is 40 - 60 mm / h , the cyclic subsidence amount is about 30 mm , the maximum is up to 52 mm , and the telescopic margin of the movable column of the support is about 300 mm , so as to avoid working at lower support height for a long time , and reduce the risk of the cutting - top pressing frame .

【作者单位】：天地科技股份有限公司开采设计事业部;煤炭科学研究总院开采研究分院;中国煤炭科工集团有限公司;
【基金】：国家自然科学基金资助项目(51304115,51504136,U1261211)
【分类号】：TD323;TD355
【正文快照】： 北京100013)工作面液压支架与顶板的相互作用是矿压与顶板控制研究的核心内容。地下煤层开采后引起的顶板破坏及下沉运动造成工作面围岩应力及位移变化,也是导致工作面矿山压力显现的直接原因。查阅近年的相关文献发现,现场通常更关心支架需要为支撑系统稳定提供多大的支护能

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