煤矿井下岩石摩擦对瓦斯气体的点燃特性  

Ignition Characteristics of Underground Coal Mine Rock Friction on Gas

作　　者：周锦龙[1] 易永华[1] 

机构地区：[1]云南省一九八煤田地质勘探队瓦斯院,云南昆明650208

出　　处：《煤矿安全》2015年第11期21-23,共3页Safety in Coal Mines

摘　　要：随着开采强度的不断加大,煤矿井下岩石摩擦引燃(爆)瓦斯的情况时有发生。通过岩辊渐进摩擦实验研究发现:岩石摩擦的最大闪温与相对摩擦速度的平方根成正比,岩石摩擦产生的热条痕对瓦斯的点燃能力要大于炽热颗粒,且其点火能力与岩石中能够提高表面硬度、避免热条痕磨损的坚硬组分,如石英、岩屑和长石的含量有着密切的正相关关系。另外,顶板岩块摩擦点燃瓦斯一般发生在工作面矿山压力显著显现时期,发生的地点通常在支架后部斜上方的位置。With the increasing of exploitation intensity,coal mine gas burning or explosion ignited by rock friction have occurred time and again. By the experimental study about progressive friction of rock roll,some conclusions were drawn that the maximum flash temperature is proportional to the square root of relative friction velocity; the ability to ignite methane by hot streaks is greater than by hot particles; the ignition capability positively correlates with the hard framework grains such as quartz,rock fragments and feldspar. In addition,combined with case analysis,it was drawn that the methane ignited by roof rock friction generally occurs during the periodic weighting and in the position of the bracket rear obliquely upward.

关 键 词：岩石摩擦 瓦斯燃烧 瓦斯爆炸 热条痕 炽热颗粒 摩擦点火 

分 类 号：TD712.71[矿业工程—矿井通风与安全]