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- Formation and application of the front abutment pressure on longwall face 論采場(chǎng)前方支承壓力的形成及應用
- It is elaborated that the abutment pressure has the process of formation and development,by which the behavior mechanism is explained. 通過(guò)闡明采場(chǎng)前方支承壓力存在形成和發(fā)展過(guò)程，從形成機理上給予解釋說(shuō)明。并應用這一規律解釋了有關(guān)礦壓現象。
- Overlength isolated working face reduces the superposed influence of two sides abutment pressure on isolated working face. 超長(cháng)孤島工作面減小孤島工作面側向支承壓力的疊加影響。
- According to the character of abutment pressure, receive the conclusion that the minimum size to extract is relate to the gob area of the both sides, and provide the formula. 根據煤體支承壓力分布特征得到最小孤島煤體可開(kāi)采尺寸與兩側采空范圍相關(guān)的結論，并給出了計算公式。
- It is put forward that the top coal of low gaseous steep seam can be caved only when the top coal is in the limiting equilibrium state of stress under the abutment pressure. 應用彈塑性理論分析了礦山壓力對急傾斜煤層頂煤破碎的作用,認為在低瓦斯急傾斜煤層中只有當頂煤在支承壓力的作用下進(jìn)入應力極限平衡狀態(tài)時(shí),頂煤才可放出,據此計算頂煤可能的分段高度。
- Stress shell, which bears and pass load of overlying strata, is primary supporting body.The stress in skewback of stress shell forms abutment pressure of surrounding rock in vicinity of working face. 應力殼承但并傳遞上覆巖體荷載和壓力，是最主要的承載體，應力殼拱腳處應力形成采場(chǎng)四周?chē)鷰r支承壓力。
- The position and state of the main roof above the terminal line of the coalface nearby the rises affect the magnitude of the peak abutment pressure and the difficult extent of the rise maintenance. 上山附近終采線(xiàn)上方老頂巖層的位態(tài)影響著(zhù)煤柱支承壓力的大小和上山維護的難易程度。因此,工作面終采線(xiàn)的位置,應盡可能確定在老頂巖層周期來(lái)壓完成之后。
- Based on the key strata theory, the effect of the key strata breakage, position and the effect of the cut depth on the surrounding rock abutment pressure is analyzed in numerical simulation ways. 運用數值模擬方法,主要分析了關(guān)鍵層的破斷、關(guān)鍵層相對位置及采深等對圍巖支承壓力的影響;
- The front cover of the novel has been torn off. 這本小說(shuō)的封面已被撕掉。
- abutment pressure of side direction 側向支承壓力
- Keywords soft rock;coalface;abutment pressure; 軟巖;采場(chǎng);支承壓力;
- I drove up in front of the house and honked. 我將車(chē)開(kāi)到屋子前面然后按喇叭。
- The driver was ticketed for parking in front of a fire hydrant. 那個(gè)司機因把車(chē)停在消防栓前而接到交通違規罰單。
- He stood in front of the shop with arms akimbo. 他兩手叉腰，站在鋪子前。
- There is a rose bush in front of the office. 辦公室前有一叢玫瑰。
- She curled up in front of the fire with a book. 她蜷曲在爐火前看書(shū)。
- He pushed his way to the front of the crowd. 他擠到了人群的前面。
- A car suddenly pulled out in front of me. 一輛汽車(chē)突然橫沖到我面前。
- A cold front is moving in from the north. 一股冷鋒正從北方向這里移動(dòng)。
- She got on the bus and picked a seat up front. 她上了公車(chē),找了個(gè)最前面的座位。
