CAJ | 학술논문

针对综采工作面“U”型与“Y”型通风特点，建立了多场耦合的采空区自然发火模型，开发了基于有限体积法离散的模型解算程序，结合实例研究了相同条件下“U”型与“Y”型通风对采空区自然发火的影响，给出了不同通风系统下的采空区压力场、速度场、氧浓度场以及冒落煤岩固体温度场的分布情况。对比研究表明：“Y”型通风增大了采空区的漏风量，扩大了较高浓度氧气的分布范围，从而导致采空区温度更高。最后分析了“Y”型通风下的采空区漏风变化特点。该成果对“Y”型通风下的采空区自然发火防治工作具有一定指导意义。
침대종채공작면“U”형여“Y”형통풍특점，건립료다장우합적채공구자연발화모형，개발료기우유한체적법리산적모형해산정서，결합실례연구료상동조건하“U”형여“Y”형통풍대채공구자연발화적영향，급출료불동통풍계통하적채공구압력장、속도장、양농도장이급모락매암고체온도장적분포정황。대비연구표명：“Y”형통풍증대료채공구적루풍량，확대료교고농도양기적분포범위，종이도치채공구온도경고。최후분석료“Y”형통풍하적채공구루풍변화특점。해성과대“Y”형통풍하적채공구자연발화방치공작구유일정지도의의。
According to the characteristics of the“U”and“Y”type ventilation of fully mechanized coal face, the multi-field coupling model of the spontaneous combustion in goaf was built, and the calculating program to the model which was based on the Finite Volume Method discretization was developed. The influences of the U and “Y”type ventilation on the spontaneous combustion in goaf in the same conditions were studied, so the distributions of the pressure field, the velocity field, the oxygen concentration field and the temperature field of the caving coal rock solid were obtained. Comparative study shows that the“Y”type ventilation increases the air leakage quantity of the goaf, enlarges the distribution scope of the high concentration oxygen and results in the higher temperature in goaf. What’s more, the law of the air leakage of goaf under the“Y”type ventilation was got that the leakage at the gob-side entry retaining decayed according a power function. The results have a certain guiding significance for spontaneous combustion prevention and control of goaf under“Y”type ventilation.