基于数值模拟的浅埋煤层综采工作面覆岩移动和矿压规律研究

Overlying rock movement and mining pressure law in shallow coal seam fully mechanized working face based on numerical simulation

  • 摘要: 为直观研究煤矿采场支架与围岩之间的作用关系,基于CDEM数值模拟软件,建立与“工作面推进-顶板岩层运动”实际物理过程相符的数值模型,实现采煤工作面液压支架与围岩耦合的二维动态数值模拟。以大湾煤矿12311综采工作面为工程背景,直观地研究浅埋煤层综采工作面覆岩结构运动和矿压规律。结果表明,工作面基本顶初次和周期来压期间,支架工作阻力相差不大;工作面超前压力影响区域为工作面前方釆高大小的2.0~3.0倍范围内;工作面基本顶初次和周期来压时,支架平均工作阻力为9.0~11.0倍采高的岩层重量载荷。模拟结果与现场监测数据一致,为研究支架-围岩关系提供了新的方法。

     

    Abstract: In order to visually study the relationship between support and surrounding rock in coal mine, based on the CDEM numerical simulation software, a numerical model consistent with the actual physical process of “working face advancing-roof strata movement” is established to realize the two-dimensional dynamic numerical simulation of the coupling between the support and the surrounding rock in the mining working face.Based on the conditions of 12311 mining working face of Dawan Coal Mine, the overburden structure movement and ground pressure law of mining working face in shallow coal seam are studied.The results show that there is little difference between the working pressure of the support during the initial and periodic weighting of the basic roof breakage.The area affected by the advance pressure is within 2.0~3.0 times of the mining height before the working face.The average working resistance of the support under the initial and periodic weighting of the basic roof of the working face is 9.0~11.0 times of the weight load of the rock stratum at the mining height.The simulation results are consistent with the field monitoring data, which provides a new research method for studying the support-surrounding rock relationship.

     

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