复杂条件下大倾角对放顶煤冒放规律的影响研究  

Study on the influence of greater pitching to top coal caving law in complex conditions

作　　者：吕秀江[1] 耿妹华[1] 郝彬彬[1] 

机构地区：[1]河北工程大学资源学院,河北邯郸056038

出　　处：《河北工程大学学报（自然科学版）》2007年第4期91-93,共3页Journal of Hebei University of Engineering:Natural Science Edition

摘　　要：根据申家庄煤矿2208工作面具体的工程地质条件,理论分析了大倾角对顶煤冒放性的影响,指出大倾角将使工作面上、中、下部产生三种性质不同的力学结构,并通过RFPA有限元软件分别对这三种结构的冒放特征进行了数值模拟,揭示了大倾角煤层顶煤的冒放规律,对该矿优化采煤工艺、提高煤炭采出率有重要指导意义。According to engineering geological conditions of 2208 coal face of Shenjiazhuang mine, the influence of greater pitching to top coal cavability is analyzed theoretically according to the influence of greater pitching. There are three mechanics structures on upper, middle and lower part of coal roof that are completely different in mechanical property. Then coal caving law of the three structures are simulated by finite element software RFPA, By means of about mentioned study, it has uncovered the law of greater pitching to top coal caving, It is significant for technology optimization and increasing coal recovery rate in the mine.

关 键 词：大倾角 冒放规律 放顶煤 伪俯斜 

分 类 号：TD823.21[矿业工程—煤矿开采]