煤矿安全2019，Vol.50Issue(7)：270-273,4.DOI:10.13347/j.cnki.mkaq.2019.07.063
厚松散层浅埋煤层开采地表下沉影响因素分析
Analysis of Factors Affecting Surface Subsidence in Thick and Loose Seam with Shallow Coal Seam Mining
摘要
Abstract
To study the main factors affecting the surface subsidence in shallow seam mining with thick unconsolidated strata, the orthogonal experiment method was used to rank the influencing degree of the three factors: bedrock thickness, unconsolidated strata thickness and mining thickness. The results show that bedrock thickness is the main controlling factor of the surface subsidence. It is concluded that ratio of bedrock thickness and mining height and ratio of bedrock thickness and overburden thickness are the key factors to determine the degree of surface subsidence and overburden failure. The comprehensive function expressions of the maximum subsidence value, coefficient of subsidence and influencing factors are given by regression analysis and fitting. The results are verified by engineering examples. The results show that the function expressions have high reliability.关键词
正交试验/数值模拟/基载比/基采比/函数表达式/地表下沉/松散层/基岩厚度Key words
orthogonal test/numerical simulation/ratio of bedrock thickness and mining height/ratio of bedrock thickness and overburden thickness/function expression/surface subsidence/loose seam/bedrock thickness分类
矿业与冶金引用本文复制引用
赵兵朝,贺圣林..厚松散层浅埋煤层开采地表下沉影响因素分析[J].煤矿安全,2019,50(7):270-273,4.基金项目
国家自然科学基金资助项目(51874230) （51874230）
