油型气涌出矿井局部通风排瓦斯优化

发布时间：2018-04-14 23:41

本文选题：掘进巷道 + 油型气　；参考：《西安科技大学学报》2017年06期

【摘要】：为了对油型气涌出条件下掘进巷道局部通风参数进行优化,解决油型气涌出造成的掘进巷道局部瓦斯超限问题,采用仿真软件ANSYS对掘进巷道压入式通风进行数值模拟,运用压入式通风掘进工作面风流流场结构特点,对油型气涌出条件下掘进巷道中CH4浓度分布进行研究,分析了风筒进风速度分别为8,10,12 m/s以及风筒直径分别为0.6,0.8,1 m时,油型气主要成分CH4在巷道中的扩散规律。研究表明,当风筒风速由8 m/s增加到12 m/s,风筒直径由0.6 m增加为1 m时,油型气与巷道内风流混合更加充分,高浓度CH4区域更小,工作面回风瓦斯浓度在0.5%左右,符合《煤矿安全规程》规定。由此可见,掘进巷道有油型气涌出时,根据工作面实际情况适当的增加风速,增大风筒直径可以有效地排出底板油型气,有效预防局部瓦斯超限,改善掘进工作面作业环境。
[Abstract]:In order to optimize the local ventilation parameters of tunneling roadway under the condition of oil-type gas emission and to solve the problem of local gas exceeding limit caused by oil-type gas emission, the numerical simulation of pressure-entry ventilation in tunneling roadway was carried out by using the simulation software ANSYS.In this paper, the CH4 concentration distribution in roadway under the condition of oil-type gas emission is studied by using the structure characteristics of wind flow field in pressure-type ventilation tunneling face. When the air velocity of the tuyere is 81010m / s and the diameter of the tuyere is 0.6m 0.8m, respectively, the distribution of CH4 concentration in the roadway is studied.Diffusion of CH4, the main component of oil gas, in roadway.The results show that when the wind speed of the tuyere increases from 8 m / s to 12 m / s, and the diameter of the tuyere increases from 0.6 m to 1 m, the mixture of oil type gas and air flow in the roadway becomes more fully, and the area of high concentration CH4 is smaller, and the gas concentration of return air in the working face is about 0.5%.Comply with the coal mine safety regulations.Thus it can be seen that when oil type gas is gushed out of tunneling roadway, according to the actual situation of working face, increasing wind speed appropriately, increasing air tube diameter can effectively discharge oil type gas from bottom plate, effectively prevent local gas from exceeding limit, and improve the working environment of driving face.
【作者单位】：西安科技大学安全科学与工程学院;教育部西部矿井开采及灾害防治重点实验室;
【分类号】：TD712;TD724

【相似文献】