郓城煤矿综放采场微地震与应力特征研究及应用

发布时间：2018-01-03 22:16

  本文关键词：郓城煤矿综放采场微地震与应力特征研究及应用　出处：《安徽理工大学》2016年硕士论文　论文类型：学位论文

  更多相关文章： 综放工作面 微地震 应力 特征 冲击地压

【摘要】：冲击地压具有不确定性、发生机理与条件复杂性。本论文通过前人关于多信息融合防治冲击地压的研究,针对郓城煤矿1300综放工作面开采实践,采用微地震监测技术和冲击地压实时在线监测技术,开展了以下研究工作：1、利用微地震监测技术,对缓倾斜厚煤层综放采场的微地震特征进行了研究,得到了微地震事件频次及能量的时序特点、空间分布特征和震级—频率关系：(1)回采期间,综放工作面微地震事件日个数大部分在10个以上,且微地震释放的能量较小；回采扰动对围岩损伤变形具有一定的关联。(2)随着工作面的推进,微地震事件的分布呈现出明显的分区性：1300综放工作面附近的采动影响Ⅰ区；工作面超前300m左右的Ⅱ区；1301工作面(准备工作面)靠近一采区轨道大巷的Ⅲ区。(3)通过现场实例验证了b值在矿井发生冲击地压前会发生明显的差异。2、利用冲击地压实时在线监测技术,对综放工作面回采期间围岩支承压力进行了监测研究,并得到该期间的应力特征：(1)工作面走向支承压力影响范围为超前工作面30.4～76m,大约是7倍的采高；支承压力峰值位置距煤壁13.2～22.8m,大约是3倍的采高。(2)工作面围岩出现了两个支承压力：静态支承压力和动态支承压力,静态支承压力峰值的位置比动态支承压力峰值的位置到煤壁的距离更远。根据现场实际情况,将矿山岩体力学、矿压理论和专业地球物理与微地震监测设备及冲击地压实时在线监测设备测得的基础数据融合,对采场围岩三维破裂特征及运动特征、采场支承压力演化特征进行分析,为科学地进行开采设计、矿山压力控制、冲击地压防治等提供依据。
[Abstract]:The impact ground pressure is uncertain, the occurrence mechanism and the condition are complex. This paper aims at the mining practice of 1300 fully mechanized caving face of Yuncheng Coal Mine through the previous research on multi-information fusion to prevent the impact ground pressure. Using micro-seismic monitoring technology and real-time on-line monitoring technology of impact ground pressure, the following research work: 1 is carried out. Using micro-seismic monitoring technology, the micro-seismic characteristics of fully mechanized caving stope in gently inclined thick coal seam are studied. The frequency and energy time series characteristics of microseismic events, spatial distribution characteristics and magnitude frequency relation: 1) during mining, the number of micro-earthquake events in fully mechanized caving face is more than 10 days. And the energy released by microearthquakes is relatively small. Mining disturbance has a certain correlation to the damage and deformation of surrounding rock.) with the advance of the working face, the distribution of microseismic events shows obvious zoning effect area I near the fully mechanized top-coal caving face. Area 鈪，

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