采矿与安全工程学报Issue(2)：227-232,239,7.DOI:10.13545/j.cnki.jmse.2015.02.009
西部浅埋煤层煤样承载力及冲击倾向特征研究
Research on bearing capacity and burst proneness of coal samples from western shallow-buried coal seam
摘要
Abstract
Shallow buried depth, thick coal seam and narrow coal pillar are typical occurrence charac-teristics of western shallow-buried coal seam in China.The uniaxial compression test of coal samples in water-saturated and air-dried conditions, in four temperature levels between 25 ℃ and 250 ℃, and of three different kinds of ratio of height to diameter has been conducted respectively in order to investi-gate the influence law of temperature, water, and dimension on the bearing capacity and burst proneness of coal samples from western shallow-buried coal seam.The results show that: 1) From natural state-water saturation-seasoned state, peak strength and the modulus of coal samples decrease sharply while the peak strain increases gradually.The damage extent becomes more and more severe while the burst proneness weakens. 2) With the gradual increase of the temperature, peak strength, peak strain and the modulus of coal samples all first increase then decrease, and all arise the critical point when the temperature is 100 ℃, at this time burst proneness of coal samples aggravates with severe splashing during the loading process.However, both the bearing capacity and burst proneness weaken gradually as the temperature continues to rise to 250 ℃. 3) With the increase of the ratio of height to diameter,peak strength, peak strain and the modulus of coal samples all show the attenuation trend.Deformation and the damage extent weaken while the burst proneness strengthens.关键词
西部浅埋煤层/饱水/高温处理/高径比/冲击倾向Key words
western shallow-buried coal seam/saturation/high temperature treatment/the ratio of height to diameter/burst proneness分类
建筑与水利引用本文复制引用
苏海健,尹乾,靖洪文,赵洪辉..西部浅埋煤层煤样承载力及冲击倾向特征研究[J].采矿与安全工程学报,2015,(2):227-232,239,7.基金项目
国家重点基础研究发展计划(973)项目(2013CB036003)；江苏省普通高校研究生科研创新计划项目(CXZZ13_0935)；国家自然科学基金项目(51374198) （973）
