摘要
利用RFPA岩石破断过程分析系统软件,对神府东胜矿区活鸡兔煤矿厚松散层浅埋煤层首采工作面上覆岩层在采动后的活动规律进行了动态数值模拟。并根据模拟结果,分析了随着工作面采动和推进,上覆岩层的破断过程、特征与来压特点。模拟结果表明,卸荷变形是引起浅埋煤层直接顶初始离层的主要因素之一,浅埋煤层老顶岩层破坏的主要顺序仍为“离层——断裂——垮落”,厚松散层浅埋煤层开采时,当关键承载层完全垮落后,覆岩会发生直达地表的整体切落现象。
In this paper, the RFPA(Stratum Failure Process Analysis) software is used to simulate the movement rule of overlying strata when the shallow coal seam was extracted in the Huojitu Mine of Shenfu-Dongsheng mine area. According to simulation results, along with working face being advanced, the failure processes and features, and weighting of overlying strata, were analyzed. Load-relief deformation is one of the main factors causing first separation layer of immediate roof in shallow coal seam. The main sequence of main roof抯 destruction in shallow coal seam is 憇eparation layer- breaking caving? When the shallow coal seam is extracted, after the keyload-bearing layer fully collapses, the overlaying layers will be cut and fallen, and the cracks will expand to the earth's surface.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2002年第2期143-145,共3页
Journal of Liaoning Technical University (Natural Science)
