摘要
本文以弹-塑性有限元为数值模拟手段,研究了在地表不允许崩落的条件下,留连续条形矿柱的房柱采矿法重复采动的问题。对上、下矿层间的夹岩层较厚大时,下矿层的开采对上层已采空区稳定性的影响进行了讨论。提出了隔离层的概念。分析了隔离层的存在,在开采参数的选择和矿房及矿柱的布置中所起的重要作用。
In this paper, on condition that caving in the surface is not made, a bi-level mining system with room and pillar method keeping line pillars is studied by means of numeral simulation of the clestic-plastic finite element method. Effects of the lower level mining on the upper level excavation are discussed when the rock layer between two seams is thinker. A idea of seprating layer is put forward. It is analysed the presence of the separationg layer play an important role in election of mining parameters and aragment of rooms and pillars.
关键词
房柱采矿法
重复采动
数值模拟
Finite element
Room and pillar method
Bi-level mining system
The separatiing layer
Mining parameters
