非间隔式注氮防灭火装置动力参数

摘要

Aiming at the problems of buried tube nitrogen injection that the nitrogen injection spot with intervals in the space causes the failure of continuous nitrogen distribution in goaf,leading to poor inert effect. In addition, the unrecy- cling of the nitrogen injection pipe causes great resources waste. Based on the principle that the shear capacity of the mining nitrogen injection pipe is superior to its tensile strength, new fire nitrogen injection process （rotating traction and non-interval） was designed, fundamentally solving major defects of buried pipe nitrogen injection ,which can real- ize the synchronous movement between nitrogen injection point and the workface. According to the relevant principles of planar problems in elastic mechanics, the calculation method about dynamic parameter of non-interval nitrogen in- jection process for fire control was put forward. By using a geotechnical engineering numerical simulation software, the stress distribution of the nitrogen injection pipe in the goaf of Yanzishan Mine was simulated, and the traction power was computed based on it.%针对传统埋管注氮防灭火工艺中存在的重大缺陷：注氮点在采空区空间上存有间隔,氮气未能形成连续性分布,惰化效果差,氮气消耗量大,注氮管不能回收,造成极大的资源浪费,基于采空区注氮管的抗剪切能力优于抗拉能力的原理,设计了旋转牵引方式的非间隔式注氮防灭火工艺,可使注氮点与工作面保持同步位移,发挥最佳注氮效应。根据弹性力学中分析平面问题的相关原理,提出了非间隔式注氮防灭火工艺的动力参数计算方法。利用岩土工程数值模拟软件模拟了燕子山矿采空区注氮管的应力分布状况,并以此为依据计算了动力值。