STUDY ON THE STABILITY OF IMMEDIATE ROOF BLOCKS AT THE END FACE

被引：0
|
作者：
杨双锁
康立勋
钱鸣高
机构：
来源：
JournalofCoalScience&Engineering(China) | 1999年 / 01期
关键词：
end face; key block; equilibrium state; supporting force;
D O I：
暂无
中图分类号：
TD82 [煤矿开采];
学科分类号：
081901 ;
摘要：
Using vector-analysis, three kinds of roof blocks at the end face of fully mechanized long wall faces have been studied. Tbe result indicates that with face advancing, the three kinds of blocks may all become key blocks. It is put forward that the key blocks can reach into the scope of angle of fracture through supporting, and the fomulas for calculating supporting force needed for the three key blocks to maintain stadility have been derived.
引用
收藏
页码：30 / 32
页数：3
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