The isolated island panel 10304 of the Xinglongzhuang coal mine was used as the research subject to study the deformation and damage characteristics of the coal seam floor. The damage of the floor was studied using the borehole strain sensing method and borehole imaging technology, and FLAC3D was used to study the influence of abutment pressure on floor failure. The result shows that the floor under the superimposed area which is affected by lateral and advanced abutment pressure is damaged firstly, and the maximum depth reaches 26 m, other areas of the working face about 23 m. The degree of deformation and failure of floor rock at different depths is decreased. The deformation damage increases with the advancement of the working face until a certain distance at the same depth. The hole image can clearly show the influence range of the abutment pressure in front of the coal wall and influence the degree of the advancement and lag by means of the strain increment curve for each sensor probe and the images from different drilled positions. On the basis that the results of simulation and field measurement are consistent, the results can reflect the three-dimensional failure characteristics of the whole island working face floor in the process of coal mining more comprehensively and accurately; moreover, they also can provide important information for mine flood prevention and ecological environment protection.

中文翻译：

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底板岩体变形破坏综合测量——以兴隆庄煤矿为例

以兴隆庄煤矿10304孤岛板为研究对象，研究煤层底板变形破坏特征。利用钻孔应变传感方法和钻孔成像技术研究了底板的损坏情况，并使用FLAC3D研究了桥台压力对底板破坏的影响。结果表明，受侧向和超前支座压力影响的叠加区下底板首先破坏，最大深度达26 m，工作面其他区域约23 m。不同深度的底板岩体变形破坏程度降低。变形损伤随着工作面前进到同一深度一定距离而增大。孔图像可以通过每个传感器探头的应变增量曲线和不同钻孔位置的图像，清楚地显示煤壁前方的基台压力的影响范围和影响提前和滞后的程度。在模拟结果与现场实测结果一致的基础上，能够更全面、准确地反映采煤过程中全岛工作面底板的三维破坏特征；此外，它们还可以为矿山防洪和生态环境保护提供重要信息。在模拟结果与现场实测结果一致的基础上，能够更全面、准确地反映采煤过程中全岛工作面底板的三维破坏特征；此外，它们还可以为矿山防洪和生态环境保护提供重要信息。在模拟结果与现场实测结果一致的基础上，能够更全面、准确地反映采煤过程中全岛工作面底板的三维破坏特征；此外，它们还可以为矿山防洪和生态环境保护提供重要信息。