三维可加载条件下工作面围岩局部变形规律

Local deformation law of surrounding rocks in coal mining face under 3D loaded conditions

以苇湖梁煤矿+579E2EB1+2急倾斜特厚综放开采工作面为典型物理原型,系统的进行大型三维立体相似模拟实验,同时利用数字化声发射技术(acoustic em ission,AE)对局部化过程中的动态力学响应参数及其与之对应的微结构演化过程进行实时追踪,从宏观与微观角度揭示不同开采条件下煤岩复合围岩介质局部化变形—演化—失稳规律,为开采扰动区衍生动力学灾变行为预报和控制研究提供线索。

Abstract： Base on the ＋ 579E2EB1 ＋2 fully mechanized top coal caving mining face in steep inclined ultra thick seam as a typical physical model, a large 3D similar simulation experiment was systematically conducted. Also the digital acoustic emission technology was applied to a real -time tracing on the dynamic mechanics response parameters during the localization procedure and the related micro structure evolution procedure. From the macro and micro points, the local deformation - evolution - instability law of the coal and rock complex surrounding rock medium was revealed under the different mining forward conditions, which could provide the clues for the prediction and control study of the derive dynamics disaster behaviors in the mining interference area.