上覆遗留煤柱作用下冲击矿压预测预警案例研究

发布时间：2018-01-14 05:23

本文关键词：上覆遗留煤柱作用下冲击矿压预测预警案例研究　出处：《煤炭学报》2016年S2期 　论文类型：期刊论文

【摘要】：以三河尖煤矿92201工作面运输巷在上覆7煤上山保护煤柱下掘进诱发的冲击矿压为例,采用震动波CT技术对待掘区域应力场进行反演,预测冲击危险区域,并在掘进过程中实时监测分析矿震动载特征,对冲击危险进行预警。研究表明:震动波CT技术可有效反应煤岩体内未知因素对应力分布的影响,实现大范围应力探测,较常规解析和数值等分析方法更为有效,利用该技术可提前和分时段预测冲击危险区域分布;结合掘进过程中的矿震时空演化规律分析,可对冲击危险区域进行有效确认和实时预警,实现了动载与静载结合对冲击危险进行提前预测与实时监测预警。利用该套技术方法分析表明,上覆遗留煤柱长时间受矿压作用,其集中应力分布明显向煤柱煤壁深处转移,导致区域应力分布异常,冲击矿压防治难度加大。92201巷道冲击矿压显现证实了以上结论和该套技术方法的有效性。
[Abstract]:Taking the impact rock pressure induced by driving under the coal pillar of 92201 working face of Sanhejian Coal Mine as an example, the stress field of driving area is inversed by vibration wave CT technique. Predict the dangerous area of impact and analyze the characteristics of mine vibration load in real time during the tunneling process. The research shows that the vibration wave CT technology can effectively reflect the influence of unknown factors in coal and rock on stress distribution and realize large-scale stress detection. This method is more effective than conventional analytical and numerical analysis methods, and it can be used to predict the distribution of shock risk areas in advance and in different periods. Combined with the analysis of the temporal and spatial evolution law of mine earthquakes in the process of excavation, it can be used to effectively confirm the impact risk areas and to predict them in real time. The combination of dynamic load and static load is realized to predict the impact risk in advance and to monitor and early warning in real time. The analysis of this set of technical methods shows that the overlying coal pillar is subjected to rock pressure for a long time. The concentration stress distribution is obviously transferred to the coal wall of the coal pillar, which leads to the abnormal regional stress distribution. It is more difficult to prevent and cure rock burst in roadway. 92201 roadway, which proves the above conclusion and the effectiveness of this set of technical methods.
【作者单位】：中国矿业大学矿业工程学院;中国矿业大学煤炭资源与安全开采国家重点实验室;中国矿业大学深部煤炭资源开采教育部重点实验室;
【基金】：国家自然科学基金资助项目(51404243,51404269) 中央高校基本科研业务费专项资金资助项目(2014XT01)
【分类号】：TD324
【正文快照】： (1.School of Mines,China University of Mining and Technology,Xuzhou 221116,China;2.State Key Laboratory of Coal Resource and Safe Mining,China U-niversity of Mining and Technology,Xuzhou 221116,China;3.Key Laboratory of Deep Coal Resource Mining,Ministry

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