采矿与安全工程学报Issue(5)：814-818,823,6.
坚硬顶板垮落诱发瓦斯爆燃机理及预防
Methane burning and explosion mechanism induced by hard roof collapse and its prevention
摘要
Abstract
Taking a fully mechanized top-coal caving face in Xiakuotan Mine as research object, the impact and friction ignition phenomenon caused by hard roof collapse and the mechanism of inducing methane burning and explosion in goaf was studied and by experimental study and theoretical analysis, and the methane distribution law and easy-burning and explosion location in goaf were simulated by using Fluent Software. The results show that the collapse impact and fiction process of hard quartz sandstone roof may produce high temperature spark, which may ignite methane within goaf and induce methane burning and explosion accident. The increased temperature of impact friction surface ΔT is positively correlated, with the mass of collapsed rock m and collapse height H, that is, ∆T value in impact friction surface will increase as m and H increase. Based on distribution law of goaf methane concentration, the easy-burning and explosion area locates at upper goaf near caving face in the U-type ventilation mode, while the area may mainly distribute in middle goaf in the Y-type ventilation mode. Prevention techniques such as forced roof caving, water and inert gas injection of goaf gangue, and goaf gas drainage, etc, has been put forward.关键词
石英砂岩/摩擦火花/采空区瓦斯/瓦斯爆燃/数值模拟Key words
quartz sandstone/friction spark/goaf methane/methane burning and explosion/numerical simulation分类
矿业与冶金引用本文复制引用
张培鹏,蒋金泉,秦广鹏,武泉林,许丽娜..坚硬顶板垮落诱发瓦斯爆燃机理及预防[J].采矿与安全工程学报,2014,(5):814-818,823,6.基金项目
国家自然科学基金项目(51374139)；山东省自然科学基金项目(ZR2013EEM018)；山东科技大学科研创新团队支持计划项目 （51374139）
