CAJ | 학술논문

针对特厚煤层综放开采过程中工作面推进速度慢、采空区遗煤量大、漏风严重、极易自燃的特点，建立特厚煤层综放开采采空区渗流及扩散数学模型。利用富力矿-380 m前部22#层采空区的特征，对该特厚煤层采空区作出相应的假设，对该工作面采空区自燃“三带”进行划分，最终确定氧化带为采后距工作面25~60 m的范围。根据模拟结果，采取注氮注浆防灭火措施，取得较好的效果。利用该工作面现场数据进行数据拟合，验证防火措施效果，较好地达到防灭火的目的。
침대특후매층종방개채과정중공작면추진속도만、채공구유매량대、루풍엄중、겁역자연적특점，건립특후매층종방개채채공구삼류급확산수학모형。이용부력광-380 m전부22#층채공구적특정，대해특후매층채공구작출상응적가설，대해공작면채공구자연“삼대”진행화분，최종학정양화대위채후거공작면25~60 m적범위。근거모의결과，채취주담주장방멸화조시，취득교호적효과。이용해공작면현장수거진행수거의합，험증방화조시효과，교호지체도방멸화적목적。
During the process of fully mechanized caving for extremely thick coal seam, there are some issues to be solved,such as slow advance in working face,great amount of left-over coal in mined-out area,serious leakage,and easy to be spontaneous combustion,so the seepage flow and diffusion mathematical model for the fully mechanized caving of the extremely thick seam was built. With the use of features of 22# goaf at -380 m front of Fuli Mine,corresponding assumptions on the mined-out area in extremely thick coal seam were made,and the spontaneous combustion“three zones” in mined-out area were divided,ultimately determining that the oxidation zone away from the working face was within the range of from 25 m to 60 m. According to the numerical simulation, fire prevention measures of nitrogen injection and grouting were adopted, with good effects obtained. Meanwhile,data fitting with the field data in working face was made to verify the effect of fire prevention meas-ures. It can be better to achieve the purpose of fire prevention.