红阳矿区地应力测量及其数值分析研究

发布时间：2018-05-21 03:20

本文选题：深部开采 + 地应力　；参考：《采矿与安全工程学报》2017年01期

【摘要】：红阳矿区主采8#,12#煤,最大开采深度已超过1 000 m,回采巷道掘进及工作面回采期间均发生过冲击动力灾害。为了研究灾害形成的原因及其控制技术,现场采用空芯包体应力解除法对矿区不同埋深的6个测点完成了地应力原位测量。结果表明:各测点均有2个主应力方向接近水平方向,另一主应力方向接近于垂直方向,最大水平主应力是垂向应力的平均1.395倍,地应力场以水平构造应力场为主;各测点垂向应力均略大于上覆岩层重量;分析了最大主应力、最小主应力、垂直主应力随深度的变化规律;实测最大主应力方向为NW-SE向,平均方位角NW47.9°,结合数值模拟结果,北三采区西侧工作面组为最大水平主应力峰值位置(岩爆发生区),而其他采区随着开采位置远离峰值区域应力水平相对降低,靠近断层或者断层交叉区则应力水平降低。
[Abstract]:The main mining area of Hongyang mining area is 8 #Li 12# coal, the maximum mining depth has exceeded 1 000 m.The mining roadway excavation and mining face during the period of impact dynamic disasters have occurred. In order to study the cause of the formation of the disaster and its control technology, the in-situ measurement of in-situ stress was carried out at 6 sites with different buried depths by using the stress relief method of hollow inclusions in the field. The results show that two principal stress directions are close to the horizontal direction and the other one is close to the vertical direction. The maximum horizontal principal stress is 1.395 times of the vertical stress, and the geostress field is dominated by the horizontal tectonic stress field. The vertical stress of each measuring point is slightly larger than that of the overlying strata, the variation of maximum principal stress, minimum principal stress and vertical principal stress with depth is analyzed, the measured maximum principal stress direction is NW-SE direction, the average azimuth angle is NW47.9 掳, and the numerical simulation results are combined. The maximum horizontal principal stress peak is located in the west face group of Bei 3 mining area (rock burst occurrence area), while the stress level in other mining areas decreases as the mining location is far away from the peak area, and the stress level decreases near the fault or fault crossing area.
【作者单位】：中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室;中国矿业大学(北京)力学与建筑工程学院;黑龙江科技大学矿业工程学院;
【基金】：国家自然科学基金青年基金项目(51404278);国家自然科学基金项目(51479195) 中央高校基本科研业务费项目(2011QL07)
【分类号】：TD311

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