石门揭煤过程中煤与瓦斯延期突出模拟实验  

Simulation experiments of coal and gas delay outburst in rock cross-cut coal uncovering

作　　者：尹光志[1,2] 李晓泉[1,3] 蒋长宝[1] 李高帅[1] 蔡波[1] 

机构地区：[1]重庆大学资源及环境科学学院,重庆400030 [2]重庆大学西南资源开发及环境灾害控制工程教育部重点实验室,重庆400030 [3]广西大学资源与冶金学院,广西南宁530004

出　　处：《北京科技大学学报》2010年第7期827-832,共6页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No.50874124);国家科技重大专项资助项目(No.2008ZX05034-002);国家重点基础研究发展计划资助项目(No.2005CB221502);重庆市自然科学基金计划重点项目(No.CSTC;2008BA6028)

摘　　要：利用自行研发的"大型煤与瓦斯突出模拟实验台",用粉和石膏混合材料模拟硬煤岩封闭突出口,进行在恒定垂直应力和水平应力情况下的石门揭煤过程中煤与瓦斯延期突出模拟实验.结果表明:在恒定垂直应力作用下发生延期突出时临界瓦斯压力与水平应力呈乘幂关系,瓦斯压力与水平应力呈反方向变化;在恒定水平压力作用下发生延期突出时临界瓦斯压力与垂直应力呈二次多项式关系,瓦斯压力与垂直应力呈反方向变化;突出强度反映发生延期突出时破坏程度,与发生延期突出时临界瓦斯压力正相关,与地应力负相关.Simulation experiments of coal and gas delay outburst in rock cross-cut coal uncovering were done under the condition of fixed vertical stress or horizontal stress with a large-scale test device for simulating the coal and gas outburst and the outburst port closed by a mixing-material of coal powder and gypsum-simulated hard coal. The results show that the relationship of critical gas pressure and horizontal stress at delay outburst is exponential and reversely changes under fixed vertical stress,but relationship of critical gas pressure and vertical stress at delay outburst is a quadratic polynomial and reversely changes under fixed horizontal stress. The intensity of outburst reflects the degree of damage at delay outburst. It is a positive correlation with critical gas pressure and a negative correlation with ground stress.

关 键 词：煤与瓦斯突出 延迟 瓦斯压力 地应力 模拟实验 

分 类 号：TD713.1[矿业工程—矿井通风与安全]