Lingxin Coal Mine,CHN Energy Ningxia Lingxin Coal Industry Co. ,Ltd.
Shandong University

以灵新煤矿061405工作面为工程背景,基于弹性力学理论和数值模拟软件研究采动缓倾斜底板应力分布及空间破坏特征,并提出考虑底板破坏空间特征的突水危险性评价方法。结果表明:采动缓倾斜底板最大破坏深度解析值为21.5m;沿工作面倾向采动底板破坏形态呈现“非对称倒马鞍”形且具有“靠近采空区上侧破坏深度小、下侧破坏深度大”的特征;采动缓倾斜底板破坏空间特征整体呈现从采空区中心区域向四周断层式增长的不对称变化趋势。考虑底板破坏空间特征的突水危险性评价结果与开采实践情况一致。

Taking the working face of Lingxin Coal Mine as the engineering background,this study investigates the stress distribution and spatial failure characteristics of the gently inclined floor caused by mining,based on the theory of elasticity and numerical simulation software. Additionally, a method for evaluating the water inrush hazard considering the spatial characteristics of floor failure is proposed. The results indicate that the maximum analytical depth of failure in the gently inclined floor is 21. 5 m. The failure pattern along the working face exhibits an “asymmetric saddle” shape,characterized by “shallower failure depths on the upper side near the goaf and deeper failure depths on the lower side”. The spatial failure characteristics of the gently inclined floor show an overall asymmetric trend of fault-like growth from the center of the goaf to the surrounding areas. The evaluation results for the water inrush hazard,considering the spatial characteristics of floor failure,are consistent with actual mining practices.

黄辉,宋喜东,虎晓龙,等.缓倾斜煤层采动底板破坏空间特征研究及应用[J].矿业安全与环保,2024,51(5):83-88.

HUANG Hui,SONG Xidong,HU Xiaolong,et al. Research on spatial failure characteristics of mining floor in gently inclined coal seams of underground coal mining and its application[J]. Mining Safety & Environmental Protection,2024,51(5):83-88.