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综放面采空区流场模拟及自燃危险区域划分
引用本文:张辛亥,刘灿,周金生,张健.综放面采空区流场模拟及自燃危险区域划分[J].西安科技大学学报,2006,26(1):6-9.
作者姓名:张辛亥  刘灿  周金生  张健
作者单位:1. 西安交通大学,能动学院,陕西,西安,710049;西安科技大学,能源学院,陕西,西安,710054
2. 西安科技大学,能源学院,陕西,西安,710054
3. 黑龙江省双鸭山市,双鸭山矿业集团,黑龙江,双鸭山,155100
基金项目:科技部专项基金;国家自然科学基金;陕西省教育厅资助项目
摘    要:综放采空区容易发生自燃。以往对采空区“三带”的划分主要通过向采空区埋管观测来实现,对于现场观测不能实现的情况下,采空区自燃危险区域难以判定。笔者通过对采空区渗流场的数值模拟,得到采空区渗流速度及O2浓度的分布。结合实验测得的煤自然发火期和自燃临界参数,对采空区“三带”进行划分。该方法计算量比模拟采空区煤自燃全过程少得多,但划分精度却能够满足实际防灭火需要。

关 键 词:采空区  自燃危险区划分  数值模拟
文章编号:1672-9315(2006)01-0006-04
修稿时间:2005年3月9日

Modeling of flow field and partition of spontaneous combustion danger zone in gob of fully mechanized caving face
ZHANG Xin-hai,LIU Can,ZHOU Jin-sheng,ZHANG Jian.Modeling of flow field and partition of spontaneous combustion danger zone in gob of fully mechanized caving face[J].JOurnal of XI’an University of Science and Technology,2006,26(1):6-9.
Authors:ZHANG Xin-hai  LIU Can  ZHOU Jin-sheng  ZHANG Jian
Abstract:Spontaneous combustion is easily to take place in mined out area of fully mechanized top coal caving workface.Partition of self-heating zone in the area is mainly based on observed result from mined out area with pre-embedded sensors.In some cases,some parameters are hard to be observed which makes it difficult to plot out spontaneous combustion danger ous zone.Through numeric simulation,distribution of oxygen concentration and velocity of air flow in mined out area are determined.With the simulating result together with critical value and duration of coal spontaneous combustion obtained from experiment,boundary of self-heating zone is partitioned.The result set solid foundation for preventing spontaneous combustion.Compared with numeric modeling of the whole process of coal spontaneous combustion,much smaller amount of calculation is required,yet precision can satisfy the demand to predict and prevent spontaneous combustion in gob.
Keywords:mined out area  partitioning spontaneous combustion danger zone  numeric simulation
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