The traditional model is not fit for some actual gas reservoir such as channel sand, which can be described as a box-shaped drainagevolume.
传统模型对于实际气藏中如河流相沉积为主的储层则不适用，这类气藏更适合建立箱式封闭地层模型。
2
In order to improve gas drainagevolume, gas drainage on fully mechanized caving face and gas drainage pipeline network system are analyzed.
为了提高矿井瓦斯抽放量，重点分析了综放工作面的瓦斯抽放和瓦斯抽放管网系统方面。
3
Results show that the simulated drainagevolume from the field ditch is extremely close to the observed value, and the relative error of annual drainagevolume is only 0.4%;