level seam 中文意思是什麼
level seam
解釋
水平層-
Sub - level caving mining with seam of thickness dirt band
含厚夾矸煤層的綜放開采 -
Abstract : by applying the system reliability and ergonomics theory, the reliability mod el of the man - machine - environment system of roadway sub - level caving in steep seam is set up, and the calculation formulas for the usability and pro duction capacity of the system are also provided
文摘:應用系統可靠性和人-機工程學理論，建立了急傾斜煤層巷道放頂煤人-機-環境系統可靠性模型，給出了系統可用度和生產能力的計算公式。 -
Technology of mining without pillar for level entry in much thicker inclined coal seam
淺談特厚易燃煤層水平布置巷道無煤柱開采技術 -
Based on main factors influencing degree of level for bitumen road surface under construction, the paper puts forward measures to improve degree of level of bitumen road surface for urban road construction including how to practice seal construction, how to choose suitable machinery and technology and how to handle cross wide contact seam
摘要根據影響瀝青面層施工平整度的主要因素，從實行封閉式施工、選擇先進適用的攤鋪機械和攤鋪工藝以及橫向接縫的處理3個方面，提出提高城市道路瀝青面層平整度的措施。 -
Practice of gas control in protective seam face at deep level
深水平保護層工作面瓦斯治理實踐 -
Yangzi petrochemical is an economic cell on the organism of state - run listed company, it has general meanings : in term of special meaning, as the super - huge state - owned enterprise, yangzi petrochemical can be regarded as an epitome or sample of the state - run listed company ; " arepreseutative of specials type of state run listed company of our country. ludividually. yangzi petrochemical can be called the ridge pole and seam of the state owned esterprise, represatative os the petrochemical industry trade no master its production scale, management level, or the income form sale and profit level. then
「揚子石化」作為國有上市公司經濟機體上的一個經濟細胞，具有一般意義；從特殊意義來講， 「揚子石化」作為特大型國有企業，可以看作是國有上市公司的一個縮影或者樣本，可以看作我國國有上市公司特殊類型的一個代表與象徵；個別地講， 「揚子石化」 ，無論是其生產規模、管理水平，還是銷售收入與利潤水平，都可稱為國企的棟梁，石化行業的代表。 -
Numerical simulation study on laws of strata behavior in seam roadway for fully mechanized sub - level caving face supported by bolt - wire mesh - anchor
錨網索支護綜放全煤巷道礦壓顯現規律數值模擬研究 -
Gas - control on sub - level working face of single and thick coal seam
單一厚煤層放頂煤工作面的瓦斯治理 -
The caving roadways support have to complete two tasks in the steep seam sub - level caving. the one is to maintain the caving roadway stability, the another is to help the top coal to be broken. based on summarizing and analyzing field test, a fuzzy comprehensive judgment model is established for selection on supports used in caving roadway by the fuzzy theory. the support pattern of caving roadway is optimized, which has fixed guiding significant in application and dissemination of the mining method. 2figs., 2tabs., 6refs
急傾斜煤層放頂煤放煤巷道的支護不僅要維護巷道的穩定，還須有助於頂煤的破碎、放出.在總結和分析現場試驗的基礎上，運用模糊數學理論，建立了放煤巷道支護選型的綜合評判模型，對放煤巷道的支護方案進行了優選，對推廣急傾斜煤層放頂煤法有一定的指導意義.圖2 ，表2 ，參6 -
Support technology for large cross section roadway driving along next goaf in fully mechanized sub - level caving face in high stress three - soft seam
高應力三軟煤層綜放大斷面沿空掘巷支護技術
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