大采高工作面回采地表移动规律分析
Analysis of Surface Movement Law in Large Mining Height Working Face
史梦飞1
作者信息
- 1. 山西兰花百盛煤业有限公司,山西 晋城 046700
- 折叠
摘要
为了准确保护井田范围内的建筑物,需要准确掌握工作面回采导致的地表移动规律.本文通过数值模拟方法分析不同煤层采深、基岩厚度、煤层采厚工作面开采对地表下沉的影响,并对某矿 201 大采高工作面地表布置位移观测线进行地表沉陷位移实测.研究结果表明:工作面回采过后地表下沉量随煤层采厚、基岩厚度和采深的增加而增加,对地表下沉量影响最大的为开采厚度,其次为采深和基岩厚度,工作面的回采会产生地表移动盆地,工作面回采导致的地表沉陷面积大于工作面的回采面积,研究所得该工况下地表移动基本参数,可为该区域及类似工况下地表建筑保护提供理论参考.
Abstract
In order to accurately protect the buildings within the mining area,it is necessary to accurately grasp the surface movement laws caused by the mining of the working face.This article analyzes the impact of different coal seam depths,bedrock thicknesses,and coal seam thickness on surface subsidence through numerical simulation methods,and conducts surface subsidence displacement measurements on the 201 high mining face of a certain mine by arranging displacement observation lines on the surface.The research results indicate that the amount of surface subsidence after mining increases with the increase of coal seam thickness,bedrock thickness,and mining depth.The mining thickness has the greatest impact on the amount of surface subsidence,followed by mining depth and bedrock thickness.Mining in the working face will produce a surface movement basin,and the surface subsidence area caused by mining in the working face is larger than that of mining in the working face.The basic parameters of surface movement obtained from the study under this working condition can provide theoretical reference for the protection of surface buildings in this area and similar working conditions.
关键词
大采高/煤柱保护/地表位移/地表沉陷Key words
large mining height/coal pillar protection/surface displacement/surface subsidence引用本文复制引用
出版年
2024
NETL
NSTL
万方数据