工作面“U+L”型通风系统向“U+U”型改造的研究  

Study on the Transformation from "U+L" Type Ventilation System to "U+U" Type at Fully Mechanized Coal Face

作　　者：杨磊[1] 洪克宽[1] 逄宁[1] 张旭[1] 

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221008

出　　处：《煤矿安全》2013年第11期29-32,共4页Safety in Coal Mines

摘　　要：为了解决某矿3405综采工作面在"U+L"型通风系统条件下回风巷及上隅角瓦斯经常超限的问题,建立了该综放面在"U+L"型和"U+U"型通风系统下的物理模型和数学模型,对比模拟结果分析了2种通风系统下采空区沿工作面推进方向、工作面宽度方向和垂直方向的瓦斯分布规律。数值模拟和对改造前后对34052回风巷、34053回风巷及上隅角瓦斯浓度监测表明"U+U"型通风系统有效地保证了回风巷及上隅角瓦斯浓度处于低位,保证了工作面安全回采。To solve the problem of gas overrun in return airway and upper corner under ＂U ＋ L＂ type ventilation roadway at 3405 fully mechanized coal face, this paper established physical model and mathematical model with ＂U ＋ L＂ and ＂U ＋ U＂ type ventilation system based on the actual situation. And by comparing the two kinds of ventilation system simulation results, gas distribution laws of goal were analyzed along the direction of working face advancing, face width and vertical direction. Numerical simulation and the gas concentration measurement of 34052 and 34053 return airways and upper corner showed that the type of ＂U ＋ U＂ ventilation system effectively ensured low gas concentration in return airway and upper corner and the safety mining at working face.

关 键 词：通风系统改造 综放面采空区 瓦斯分布 瓦斯运移 数值模拟 

分 类 号：TD713[矿业工程—矿井通风与安全] TD724