seam cut 中文意思是什麼
seam cut
解釋
煤層掏槽-
Research on construction technique for mawangcao tunnel 1 to cut across anticline and coal seam
馬王槽1號隧道穿越倒轉背斜和煤層的施工技術 -
During recent years the seam cut has once again come into use.
近幾年來，又再度使用了裂縫掏槽。 -
The technical specification in driving the cross - cut an outburst seam by the concussion blasting method
石門揭穿突出煤層震動爆破技術條件 -
For the tectonic coal ， the properties of higher porosity and lower permeability make it capable of keeping higher gas pressure ； both of the “ isolating action ” and “ gas - cushion action ” cut down the resistance against outburst ； the specifity of high - defomed - extent makes desorption ， escape and flowing quickly become possible ； the existing of weak - seam or “ thoroughfare - seam ” create suitable conditions for the initial erupting and continued developing of coal and gas outburst. on the whole ， it is the synhesis action of all factors ， which leads to outbursts. the existing of tectonic coal with certain thickess is the essential condition of coal and gas outbursts ， but not the sufficient condition
高空隙率、低透氣性使構造煤能夠保持較高的瓦斯壓力；破碎性、 「隔離」作用及「氣墊」作用，使構造煤抵禦外力作用的能力大大降低；構造煤變形幅度大的特性，為瓦斯的迅速解吸、放散和快速流動創造了條件；構造煤薄弱分層或「通道層」的存在，則為煤與瓦斯突出的初始激發和持續發展奠定了基礎；上述因素的共同作用，影響和制約了煤與瓦斯突出的強度和分佈.盡管如此，一定厚度的構造煤的存在只是發生煤與瓦斯突出的必要條件和有利條件，而非充分條件 -
Practice of cut hole bolt support at light face in loosen soft seam
松軟厚煤層輕放工作面切眼錨桿支護實踐 -
Practice of bolt - beam - mesh support for large - section open - off cut in thick coal seam
厚煤層大斷面開切眼錨網梁支護實踐 -
3d anchor support and cut - out pressure technology for driving in bottom of thick coal seam
三維錨索與卸壓技術在厚煤層沿底掘進支護中的實踐
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