The effects of different drawing intervaland top-coal fragmental size on flow character of coal-gangue and sand,and on mixed degree of coal and gangue were analyzed during drawing top-coal.
分析了不同放煤步距、顶煤块度对放煤过程中煤矸砂流动形态、混矸程度的影响。
Feasible drawing interval is the basis to study mining equipment of fully-mechanize coal mining with caving method.
综放开采的合理放煤步距是研制综放工作面成套技术装备的基础,是提高综放工作面采出率与煤质的关键之一。
Through observing on spot in compound mining face,the activity rule of roof coal is analyzed,the reason of roof coal crushing and distribution state are summrised,the reasonable drawing interval and questions noticed in roof and floor mannge are provided.
通过对综放工作面的现场观测 ,分析了顶煤的活动规律 ,总结出顶煤破碎的原因及分带情况 ,并提出合理的放煤步距及工作面顶底板管理中应注意的问
A new rear-caving mining method with powered shield supports in deeply inclined thick and medium thick seam is introduced in this paper.
介绍了一种在急倾斜厚及中厚煤层中开采的新型采煤方法———掩护支架架后放煤采煤法,并对其可行性、过程、基本原理、工艺流程、技术关键以及适用条件等进行了分析;介绍了瓦斯管理、防治煤层自然发火及老采空区防水措施,该法技术可行、安全可靠、技术经济指标先进,可推广应用。