shallow seam 中文意思是什麼
shallow seam
解釋
表面發紋-
Numerical simulation of the air leakage in the bedding plane of gob in shallow coal seam
淺煤層采空區層面漏風的數值模擬分析 -
From the beginning of sq9 ' s development, the sedimentary environment turn to be lake basin bog. with water becoming shallow, coal seam appeared in lowstand system tract, delta plain and delta front are the main sedimentary bodies in highstand system tract
從層序9開始，水體開始變淺，向湖沼環境過渡，低水位體系域和水進體系域出現了煤線，高水位體系域以三角洲平原及三角洲前緣沉積為主。 -
Study on roof control in shallow seam longwall mining
淺埋煤層長壁開采頂板控制研究 -
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。 -
Study on three strap in water resouces preservation in yu - shu - wan shallow seam mining
榆樹灣淺埋煤層保水開采三帶發展規律研究 -
The dcep mig has the characteristic of deeper penetration which can reduce defective fusion and good arc stabilization. the dcen mig has the characteristic of shallow penetration of welding seam, and the welding wire has a high melting speed. so the variable polarity pulsed mig is a new technology for the welding of aluminium alloy sheet
變極性脈沖mig焊是一種新的焊接工藝方法，其綜合了dcep脈沖mig焊熔深較大、可以減少焊縫的熔合不良、電弧穩定性好和dcenmig焊焊縫熔深淺、焊絲熔化速度較快的特點，減小了焊縫的熔深，增加了焊絲的熔化速度，是一種適合於薄板鋁合金焊接的新方法。 -
Numerical simulation on the breakage and falling of thick and hard roof in shallow seam
淺埋煤層厚硬頂板破斷與冒落的數值模擬 -
Combinatorial key stratum is the development of key stratum in shallow coal seam, it has the all properties of key stratum and itself ’ s property
摘要在分析組合關鍵層有關參數的基礎上，推導出了組合關鍵層初次來壓步距和周期來壓步距的計算公式。 -
Because the loader and the moduls of elasticity exists part difference in key stratum and combinatorial key stratum, and the formulae of calculating the roof weighting step has difference, so there must be existing big error if we use the formulae of key stratum to calculate the shallow coal seam ' s weighting parameter
大柳塔1203工作面按照關鍵層計算得出的頂板來壓步距與實際相差很大，而按照組合關鍵層計算得出的頂板來壓步距與實際基本吻合。 -
Testing study on 3d similar material simulation for shallow coal seam mining
淺埋煤層開采三維相似材料模擬實驗研究 -
Simulation on overlying strata ' s motion rule in shallow seam slice mining
淺埋厚煤層分層開采覆巖移動規律模擬研究 -
Numerical analysis on movement rule of overlying strata of shallow coal seam covered with thin bedrock
淺埋煤層開采覆巖移動規律數值分析 -
Simulating test study in shallow seam mining under thick soil of the earth ' s surface
地表厚土層淺埋煤層開采模擬實驗研究 -
Analysis of features of rock movement and seepage mechanism for shallow - lying coal seam mining
淺埋煤層開采巖移特徵與滲水機理分析 -
Analyzing falling crack failure of overburden strata of shallow coal seam and its control method
淺埋煤層覆巖切落裂縫破壞及控制方法分析
分享友人