CAJ | 학술논문

基于摩尔库伦岩石破坏准则,以研究倾斜煤层深部开采覆岩破坏规律为目的,利用FLAC3D数值软件对开采全过程随工作面推进时围岩的应力、位移和破坏情况进行了模拟分析,初步揭示了覆岩的破断特征及移动规律受到分步开挖引起的应力重新分布的影响. 依据采动时渗透率与应力变化的经验关系,通过FISH语言编程,建立了煤岩体渗透率比率系数的数值模型,并以此计算出采动后该系数的变化,进而表征出煤岩层开采卸压范围,为倾斜煤层深部开采时围岩的控制和瓦斯治理提供有力保障.
기우마이고륜암석파배준칙,이연구경사매층심부개채복암파배규률위목적,이용FLAC3D수치연건대개채전과정수공작면추진시위암적응력、위이화파배정황진행료모의분석,초보게시료복암적파단특정급이동규률수도분보개알인기적응력중신분포적영향. 의거채동시삼투솔여응력변화적경험관계,통과FISH어언편정,건립료매암체삼투솔비솔계수적수치모형,병이차계산출채동후해계수적변화,진이표정출매암층개채사압범위,위경사매층심부개채시위암적공제화와사치리제공유력보장.
Based on Mohr-Coulomb Criterion of rock failure and for the purpose of studying the overburden rock failure law of the inclined coal seam in deep mining, in this paper, simulation analysis was made on the stress, displacement and failure of surrounding rock in the whole mining process with the working face advance by using FLAC3D numerical software, which preliminarily revealed that the failure feature and movement rule of the overburden strata were influenced by the stress redistribution induced by step excavation. A numerical model of the coal-rock mass permeability ratio coefficient was established according to the empirical relationship between the permeability and mining-induced stress variation in mining and by using the FISH programming language. The coefficient change after mining was calculated by using this model and it was then the characterization of the pressure relief range of the coal seam during mining. All of these provided a strong guarantee for surrounding rock control and gas treatment in deep mining of the inclined coal seam.