煤矿安全2024，Vol.55Issue(11)：130-135,6.DOI:10.13347/j.cnki.mkaq.20230558
基于煤柱尺寸效应分析的工作面孤岛属性研究
Isolated island attribute of working face based on coal column size effect analysis
摘要
Abstract
The isolated island face determination is an important basis for coal mine safety supervision.In order to accurately de-termine the island attribute of the working face,a method for determining the island attribute of working face under a typical condi-tions is proposed based on the coal column size effect analysis.Combined with a mine engineering conditions,the size effect of the coal column in the west and north wing of the 305 working face was analyzed by theoretical analysis and engineering analogy.The results showed that:the coal column bodies of the west wing and north wing of the 305 working face did not cause large-scale seri-ous damage of the coal rock mass due to excessive stress concentration.The leading support pressure range of the 305 working face was less than 120 m,which was significantly smaller than the width of the coal column in the north wing.The width of the extreme balance zone of the lateral support pressure of the 305 working face is 52.3 m.The coal column body in the west wing of the 305 working face is wider than the sum of the two extreme balance zones.The west and north wings of the 305 working face are not gob areas.The 305 working face is not an island working face.关键词
采矿工程/尺寸效应/孤岛属性/微震/支承压力/极限平衡区Key words
mining engineering/size effect isolated/island attribute/micro-seismic/supporting pressure/extreme balance zone分类
矿业与冶金引用本文复制引用
李艳增,薛伟超,许幸福,卢闯..基于煤柱尺寸效应分析的工作面孤岛属性研究[J].煤矿安全,2024,55(11):130-135,6.基金项目
辽宁省自然科学基金资助项目(2022-MS-463) （2022-MS-463）
