煤矿安全2024，Vol.55Issue(5)：11-18,8.DOI:10.13347/j.cnki.mkaq.20240512
采空区顶板垮落摩擦诱发瓦斯爆炸试验研究
Experimental study on gas explosion induced by caving friction of goaf roof
母军 1米建强 1刘振文 1陈宝红 1赵平平 1张鑫源 2汪锋2
作者信息
- 1. 潞安新疆煤化工(集团)有限公司 砂墩子煤矿,新疆 哈密 839003
- 2. 山东科技大学 能源与矿业工程学院,山东 青岛 266590
- 折叠
摘要
Abstract
The collision and friction between the rock masses during the caving of the gob roof has become an important hidden danger to induce the gas explosion accident in the gob.In order to study the mechanism of gas explosion induced by sandstone fric-tion by friction velocity,friction force,gas concentration,SiO2 content and other factors,the rock friction effect igniting gas test sys-tem was used to conduct quantitative test research on each factor.The results show that when the gas concentration is 7.0%-11.5%,the gas explosion time induced by sandstone friction first decreases and then increases with the increase of gas concentration.The high friction and hot surface of sandstone is the main cause of gas explosion.Gas explosion induced by friction can be divided into two stages:gas burning on sandstone friction surface and gas explosion diffusion.The time of gas explosion induced by friction de-creases with the increase of friction and the increase of SiO2 content in sandstone.When the friction is lower than the minimum crit-ical velocity,the gas explosion will not be induced.When the friction is higher than the minimum critical velocity and lower than the maximum critical velocity,the maximum friction velocity is negatively correlated with the gas explosion time.关键词
顶板垮落/瓦斯爆炸机制/摩擦效应/摩擦速度/瓦斯燃烧比例Key words
roof caving/gas explosion mechanism/frictional effect/friction speed/gas combustion ratio分类
矿业与冶金引用本文复制引用
母军,米建强,刘振文,陈宝红,赵平平,张鑫源,汪锋..采空区顶板垮落摩擦诱发瓦斯爆炸试验研究[J].煤矿安全,2024,55(5):11-18,8.
