%0 Journal Article
%T STRUCTURAL ANALYSIS OF ARCH OF SPANNING STRATA OF TOP COAL CAVING IN STEEP SEAM<br>急斜煤层放顶煤开采“跨层拱”结构分析
%A SHI Ping-wu
%A ZHANG You-zhen
%A <br>石平五
%A 张幼振
%J 岩石力学与工程学报
%D 2006
%I 
%X The horizontal section top coal caving in steep seam is different from the gently inclined seam. Following the horizon of the coal seam thickness, the working face is arranged with short length. However, no roof but top coal and rock residues is found above the working face. The study shows that arch structure of spanning strata which parallels to its spanning coal seam, is formed above the working face in mining. The mechanical model of arch of spanning strata is established, and the inner forces calculation of arch, establishment of maximal arch span and arch shape are analyzed. The instability of arch of spanning strata can be cataloged as sliding instability and structure instability. The influence of instability on strata behavior of working face is analyzed and tested by field experiments. It shows that the analytical results of the proposed mechanical model agree well with those of in-situ tests measurement. The results indicate that the height of horizontal subsection can be increased. It is much meaningful to effectively control strata and to realize high yield and high efficiency for mining in the condition of short working face in steep seam.
%K mining engineering
%K steep seam
%K top coal caving
%K arch of spanning strata
%K structural analysis
%K sliding instability
%K structural instability<br>采矿工程
%K 急斜煤层
%K 放顶煤开采
%K 跨层拱
%K 结构分析
%K 滑落失稳
%K 结构失稳
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=D3421FAA1A0A0F0C&jid=35E747D791A1346351AFB523B7FA35CB&aid=F5D8B755BE608E66&yid=37904DC365DD7266&vid=C5154311167311FE&iid=CA4FD0336C81A37A&sid=9C65ADEB5990B252&eid=0D0D661F0B316AD5&journal_id=1000-6915&journal_name=岩石力学与工程学报&referenced_num=9&reference_num=10