基于STEPS的山区高含硫气井周边居民疏散模拟研究

Evacuation Simulation of Pedestrians around the Natural Gas Well with High Sulfur Content in Mountain Area Based on STEPS

我国高含硫气井都位于一些远郊区或偏远山区,在生产运行中已多次因出现井喷、井口溢气等险情而疏散周边居民.以山区某高含硫气井周围1 km内的居民疏散为研究对象,针对当地山峦起伏、山路坡陡等复杂地形的特点,使用STEPS软件进行模拟.根据NASA 2009年的全球DEM数据、航拍图和实地调研结果,提供了在软件中直接绘制山区三维地形和道路网络模型的方法.在人员属性的设置中,考虑了地形坡度对不同性别和年龄的人员移动速度的影响.最后通过STEPS模拟,研究了气井周围三条主要道路上的疏散时间、疏散效率以及不同类型人员的疏散.

The exploitation of natural gas well with high sulfur content is a dangerous pro- cess. In China, most of the natural gas wells with high sulfur content locate in suburb or remote mountain area. During the operation of gathering and transportation system, residents around the gas well had been evacuated many times due to the well blowouts, spills or gas re- leases. Therefore, it is of great significant to develop the evacuation simulation of pedestrians in complex terrain. The evacuation of residents within 1 km away from some gas well with high sulfur is studied. Considering the undulating hills and steep, narrow and winding mountain paths, the STEPS software is chosen to carry on evacuation simulation. According to the glob- al digital elevation model data released by NASA in 2009, aerial image and investigation, life- like geometric model containing the three-dimensional terrain and road network of the region within 2 km square centered the gas well is directly set up in STEPS firstly. Then the parame- ters are determined based on the relevant standards, regulations and researches. At last, the e- vacuation time, evacuation efficiency and the comparison of different person types are studied through the results of STEPS simulation.