深埋煤层开采侧向高压奥灰水影响特征及煤柱留设研究

Study on Influence Characteristics of Lateral High Pressure Ordovician Lime Water and Coal Pillar Retention in Deep Buried Coal Seam Mining

煤矿不断延深开采,高压突水灾害频发,断层破碎地带易成为突水多发的危险地段。本研究以新河煤矿嘉祥支断层为研究对象,采用数值模拟、理论计算等方法探讨3煤开采时高压奥灰水对上盘煤层开采的影响特征,开展断层防水煤柱留设研究,提出基于安全维护带的断层防水煤柱留设新方法。

With the continuous deepening of coal mining,high-pressure water inrush disasters occur frequently,and the fault fracture zone is easy to become a dangerous area with frequent water inrush.In this study,taking the Jiaxiang branch fault in Xinhe Coal Mine as the research object,the influence characteristics of high pressure ordovician ash water on the mining of upper coal seam during coal mining are discussed by means of numerical simulation and theoretical calculation,the setting of fault waterproof coal pillar is studied,and a new method of setting fault waterproof coal pillar based on safety maintenance zone is proposed.