【摘要】 复杂环境与多场耦合作用下,采空区煤岩体非对称变形诱致局部化失稳并演化为动力灾害。针对于西北强震作用下煤矿采空区(局部化)动力失稳定量预报,以乌鲁木齐矿区急倾斜煤层放顶煤开采为背景,首先系统分析了物理模拟复合材料损伤与破裂的"声-光-电"信号迁移途径与有效可靠的测试方法,继而构建了大型立体地球物理模拟装置与"声-光-电"指标信息测控系统,形成动力灾害源的识别技术和危险性分析技术(平台)。这最终为急倾斜厚煤层放顶煤开采技术参数的合理确定、提高灾害识别能力和预测精度以及灾害控制奠定科学基础。更多还原

【Abstract】 Under the complex environment and multi-field coupling effect,un-symmetric deformation of the mined-out-area would lead to the localized destabilization so as to induce disasters.The object is to quantificationally predict the localized dynamical destabilization of the mined-out-area applied to the high-section-top-coal-caving(HSTCC) method for heavy-steep coal seam of Wulumuqi coal region in western seismic geophysical environment.Firstly,the transferring way of acoustics(emission)-optics-electricity(AOE) signals and invalid testing method of composite physical simulation material damage and fracture process were analyzed synthetically.Then,a large-scale-three-dimensional geophysical simulation assembly were performed and its hybrid test system indicating the AOE information.The technical platform has been formed indicating the dynamic hazard origin and fatalness analysis and discrimination.Finally,those would provide the scientific foundation including determination the rational mining parameters,improving the hazard discrimination and predicting precision and disaster control in the process of the top-cave heavy steep and thick coal seam.更多还原