采动影响下采空区顶板移动规律及仿真模拟探究

发布时间：2018-03-26 04:01

  本文选题：移动规律　切入点：形成机理　出处：《安徽理工大学》2015年硕士论文

【摘要】：随着煤炭资源的不断被大量消耗,煤炭储量逐渐减少,埋藏越来越深,导致地压大,采空区顶板移动变化越来越复杂。煤层开采过程中,煤层上顶板移动会逐渐形成三个发育体系带：冒落带(也称垮落带)、裂隙带和弯曲下沉带。三带会引起安全事故,尤其裂隙带会引发突水,瓦斯灾害,所以对采空三带的观测研究对煤矿安全回采有着重要意义。 本文以袁庄煤矿Ⅳ6214工作面开采为背景,通过实验室实验获得了原岩物理力学参数和岩石属性,运用计算机仿真模拟、理论研究、现场监测等方式研究了Ⅳ6214工作面采后上覆岩层移动和层裂隙场演化过程及矿压显现,得出了上覆岩层的应力和位移时空演化规律；得出了回采对回采巷道矿压的影响规律；分析研究了三带的成因及机理,并确定了三带高度及波及范围；分析了影响三带的其他因素；并对其上覆Ⅲ水平北运输大巷进行了影响分析。另外,对Ⅲ水平北运输大巷向工作面的渗水情况作了准确的评估和预测,为渗水危害的防治方法提供了依据。 本文研究结论不仅可以指导袁庄煤矿深部6煤层的生产,还能为深部4煤层的可开发性评估提供理论及测试依据,有可能延长袁庄煤矿的服务年限。
[Abstract]:With the continuous consumption of coal resources, coal reserves are gradually reduced, buried deeper and deeper, resulting in greater ground pressure, more and more complex roof movement changes in goaf. The roof movement on the coal seam will gradually form three developmental system zones: the caving zone (also known as the caving zone, the fracture zone and the bending and sinking zone). The three zones will cause safety accidents, especially the crack zone will cause water inrush and gas disaster. Therefore, the observation and study of the three zones of coal mining is of great significance to the safe mining of coal mines. In this paper, the physical and mechanical parameters and rock properties of the original rock are obtained through laboratory experiments under the background of mining work face 鈪，

本文编号：1666239