摘要
当上方煤层采用留煤柱形式开采时,在采煤柱下方的工作面的矿压显现特征会明显不同于全部垮落法开采的矿压显现。为分析某矿过煤柱时的矿压显现特征,采用现场实测的方法进行研究。研究结果显示,下方工作面在过上方煤柱时应力最大值7.2 MPa,应力集中系数为1.18;工作面开采过程中受到上方煤柱影响出现应力集中的范围是14 m,进入煤柱前1m开始受到影响,出煤柱后1 m影响开始消失。
when the upper coal seam adopts retaining coal pillar mining,the working face under the mining pillar,the characteristics of the rock pressure at this time will be obviously different from that of the usual caving mining method.In order to analyze the rock pressure characteristics of coal pillar,the method of field measurement is adopted in this paper.The results showed that the working facee maximum stress is about 7.2 MPa in the upper coal pillar,the stress concentration coefficient is 1.18;in the process of mining affected coal pillar above the range of stress concentration is 14m,the influence scope appears 1 m before pillar mining,eliminates 1m after it.
作者
连晓阳
Lian Xiaoyang(Guandi Mine,Xishan Coal and Electricity Group,Taiyuan 030000,China)
出处
《煤炭与化工》
CAS
2017年第12期4-6,共3页
Coal and Chemical Industry
关键词
工作面煤柱
矿压显现
矿压监测
近距离煤层开采
coal pillar
rock pressure appearance
rock pressure monitoring
coal seam mining at close range
