中文摘要：

漏风对煤自燃有重要影响,研究漏风形成机制对工作面采空区防火具有重要的作用。针对采空区瓦斯抽采、上覆围岩裂隙发育对采空区漏风影响问题,以沙曲矿沿空留巷综放工作面为研究背景。根据采空区上覆煤岩特性选择经验公式计算采空区裂隙发育高度,分析了沿空留巷侧采空区上覆裂隙发育,现场实测了沿空留巷压埋管及高位钻孔中气体体积分数,并根据实测参数利用数值模拟分析了瓦斯抽采条件下采空区风流流场变化。结果表明：上覆裂隙成为采空区漏风通道,导通距离在27.2～37.2 m;在沿空留巷侧采空区回采距离100m,其氧气体积分数在10%以上,验证了采空区漏风去向;模拟结果显示,沿空留巷侧采空区立体空间范围内氧气体积分数均达到10%以上,模拟结果与实测基本保持一致。最终确定瓦斯抽采条件下沿空留巷的布置及煤岩裂隙发育是形成漏风通道的主要原因。

英文摘要：

The present study is concerned with the air leakage that may influence the coal spontaneous combustion. As is known,the study on the original source of the air leakage plays an important role in the fire prevention of the working face in a coal mine. Based on the study of the gas extraction in the goaf and the problem of upper strata fracture development that may affect the goaf air leakage,we have done a research on the gob-side entry retaining of full-mechanized caving mining face by taking Shaqu coal mine as a case study sample. For the aforementioned research purpose,we have worked out the height of the goaf fracture by selecting the empirical formulas based on the study of the coal petrology characteristics of the goaf,and analyzed the upper strata fracture development of the gob side entry retaining so as to find the gas concentration in which the drainage system of the gob-side enter retaining and high-level boreholes. Based on the above measured parameters,we have analyzed the changing situation of the airflow field in the goaf under the gas drainage through simulation. The results of our simulated study can be stated in the following way：（ 1） The range of the height of the air leakage channel has been found between 27. 2- 37. 2 m with the upper strata fracture of the goaf being the air leakage channel.（ 2） As a result of continuous observation of the gas concentration in the drainage pipeline in the goaf,we have found that the oxygen concentration in the goaf along gob-side entry should be over 10% in the range of 100 m retaining with the flow of air leakage being verified.（ 3） The simulation results also show that the oxygen concentration has been higher than 10% with the gob entry going on to exist in the goaf in accordance with the law of energy and mass conservation. Thus,the simulation results prove to be almost consistent with the measured data. And,in conclusion,we can say that the main causes leading to the formation of the air leakage passage is the gob-side entry retaining arrange