seam broken 中文意思是什麼
seam broken
解釋
爆口-
Supporting technology with meshing and bolting in high gas, inflammable, soft - broken coal seam
高瓦斯易燃松軟破碎煤層錨網支護技術 -
In accordance with the occurrence behavior of roof strata and the fracture characteristics of key stratum in shallow seam longwall mining, studied post - buckling behavior of roof key stratum in the process of mining by using initial post - buckling theory, which derived a critical load and a breaking span of the main roof during the first weighting, determined the final subsidence and the maximum rotation angle for broken key stratum, and presented an application with the example of daliuta 1203 face
摘要根據淺埋煤層頂板巖層的賦存特點和長壁開采時關鍵層的變形破斷特徵，應用初始后屈曲理論探討了開采過程中頂板關鍵層的后屈曲性態，得出了老頂初次來壓時頂板的臨界載荷和破斷步距，確定了頂板破斷后的極限下沉量和回轉角，並以神東礦區大柳塔1203工作面為例給出了工程實例。 -
Test and research on bolt and wire mesh support for mine roadway with broken seam roof
破碎煤頂巷道錨網支護試驗研究 -
Mine fire control in fully mechanized coal caving face in high gassy flammable soft broken seam
高瓦斯易燃松軟破碎煤層綜放工作面火災的防治 -
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
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