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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 continuous increase of mining intensity, coal mine rock friction ignition (explosion) gas situation have occurred. Through the experimental study of progressive friction test of rock roller, it is found that the maximum flash temperature of rock friction is proportional to the square root of relative friction velocity, and the hot streaks produced by rock friction have higher gas ignition ability than gas-fired particles, and their ignition ability and rock can be improved Surface hardness, to avoid hot streak wear hard components, such as quartz, cuttings and feldspar content has a close positive correlation. In addition, the frictional ignition of roof rock block gas occurs in the face of mine pressure is generally apparent period, the place is usually in the back of the bracket obliquely above the position.