工作面采宽与煤层底板采动破坏带深度关系数值模拟分析

摘要

底板采动破坏带深度的确定是进行带压开采的重要内容.随着综采工作面尺寸的不断增大,传统的底板采动破坏带深度统计公式法和理论公式法已不能够满足生产实践要求.以某矿11号煤层开采为工程背景,运用二维有限差分计算机软件(F-RFPA2D分析系统软件)模拟分析工作面采宽与底板采动破坏带深度之间的关系,并确定工作面临界采宽.%Floor failure height is the key to mining with water pressure. With mining width increasing, traditional statistical formula and theoretical formula of floor failure height couldn't meet requirement of production practice. Taking mining 11th Coal Seam of a colliery as an example, this paper applied 2D finite difference software--F-RFPA2D to analyzing relationship of mining width and floor failure height and obtained critical mining width.