摘要
为了探究掘进巷道压能损失的一般性规律,针对掘进巷道支护、掘进交替进行的工作机制,以口孜东矿某掘进巷道为研究背景,在压入式通风射流有效射程内,随着掘进深度的延伸建立多个巷道模型,并分别进行数值模拟,通过分析大巷进风口和出风口的压能值,得出了大巷压能损失随巷道支护量及风筒出口到掘进面距离变化的规律。模拟计算结果表明,当巷道支护量不发生变化时,大巷压能损失随风筒出口到掘进面的距离线性变化;当巷道支护量和风筒出口到掘进面的距离都发生变化时,大巷压能损失整体趋势呈"台阶型"阶段线性变化,并且这种变化在风筒出口距掘进面2.3槡S(S为巷道断面积)附近最快。模拟结果基本符合现场测试规律,具有一定的现实指导意义。
To analyze the general law of pressure loss in excavation roadway,the working mechanism of excavation and tunnel supporting alternating,according to an excavation roadway of Kou Zi Dong coal mine,several excavation roadway models are established in effective jet range along with the increasing digging distance,when forced ventilation and numerically simulated respectively. By analyzing the pressure of main roadway inlet and outlet,the variation law of roadway pressure loss along with the change of excavation support workload and distance from duct outlet to heading face is pointed out. The simulation results show that the roadway pressure loss varies linearly with changed distance if they do not have any effect with the excavation support workload impact. This variation increases steadily and remains stable,while the support workload and distance are both variable,which is conspicuous at the distance of 2. 3槡S（ S means tunnel area）. The simulation results are in accord with the realistic test and have a certain realistic guiding significance.
出处
《世界科技研究与发展》
CSCD
2015年第5期494-497,共4页
World Sci-Tech R&D
关键词
掘进巷道
压入式通风
压能损失
模拟
距离
excavation roadway
forced ventilation
pressure loss
simulation
distance
