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.
出处
《煤矿安全》
CAS
北大核心
2015年第11期21-23,共3页
Safety in Coal Mines
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
rock friction
gas burning
gas explosion
hot striation
hot particle
friction ignition
