综放工作面顶煤冒落影响因素分析

Analysis of the Influencing Factors of Top Coal Caving in Fully Mechanized Working Face

放顶煤开采是我国应用非常广泛的一种开采方法,主要原理是利用矿压压碎煤体造成冒落,最后从支架的放煤口放出,所以,顶煤的破碎冒落情况是关键所在。本文分别从地质赋存条件以及开采技术条件这两个方面,对影响放顶煤回收效果的主要因素进行了分析。地质赋存方面,主要从开采深度、煤层强度、顶煤裂隙发育、夹石层以及顶板岩层5个部分进行分析;开采技术方面,主要从采放比、放煤步距、放煤口的位置和大小以及机采高度4个部分进行分析。

It is a widely used mining method of top coal caving in our country,the main principle is using mine pressure crush coal,lead to coal caving,finally releases the coal from drawing opening of the support,so the key is broken caving situation of top coal.The major factors of influencing top coal caving recovery effect are analyzed from geological occurrence conditions and mining conditions.Geological occurrence conditions is mainly analyzed from min-ing depth,seam strength,top coal fracture development,dirt band and roof strata.Mining technology is mainly ana-lyzed from mining and caving ratio,drawing interval,drawing opening position and size and machine mining height.