PASSIVE SEISMIC VELOCITY TOMOGRAPHY AND GEOSTATISTICAL SIMULATION ON LONGWALL MINING PANEL
PASSIVE SEISMIC VELOCITY TOMOGRAPHY AND GEOSTATISTICAL SIMULATION ON LONGWALL MINING PANEL
复制标题
DOI：
10.2478/v10267-012-0010-9
复制
发表时间：
2012-01-01
影响因子：
1.2
通讯作者：
Goshtasbi, Kamran
中科院分区：
文献类型：
--
作者：
Hosseini, Navid;Oraee, Kazem;Goshtasbi, Kamran
地下开采区围岩应力的准确测定，对稳定性和地压控制有着重要的作用。本文采用基于同步迭代重建技术（SIRT）和序贯高斯模拟（SGS）的被动地震速度层析成像方法，研究了采场周围的应力重分布。采矿诱发的微地震事件被用作被动震源。由于使用了这样的震源，射线覆盖不足，为了解决这个问题，在一个更密集的网络和SOS方法估计波速。从而产生三维波速图像并将其切片到煤岩中。为了分析研究期间面板周围的应力变化，对这些图像进行了解释。结果表明，从这些速度图像可以推断出长壁壁板周围的应力重分布状态。此外，应力区（包括正面和侧面桥台以及球门区）沿长壁工作面沿着的移动是明显的。该方法可作为连续监测工作面应力变化的有效手段。这可能具有重大的安全影响，并有助于提高运营生产率。
Generally, the accurate determination of the stress in surrounding rock mass of underground mining area has an important role in stability and ground control. In this paper stress redistribution around the longwall face has been studied using passive seismic velocity tomography based on Simultaneous Iterative Reconstructive Technique (SIRT) and Sequential Gaussian Simulation (SGS). The mining-induced micro-seismic events arc used as a passive source. Since such sources arc used, the ray coverage is insufficient and in order to resolve this deficiency, the wave velocity is estimated in a denser network and by the SOS method. Consequently the three-dimensional images of wave velocity arc created and sliced into the coal scam. To analyze the variations of stress around the panel during the study period, these images are interpreted. Results show that the state of stress redistribution around the longwall panel can be deduced from these velocity images. In addition, movements of the stressed zones, including front and side abutments and the goal area, along the longwall face are evident. The applied approach illustrated in this paper can be used as a useful method to monitoring the stress changes around the longwall face continuously. This can have significant safety implications and contribute to improvements in operational productivity.