您要查找的是不是:
- It is elaborated that the abutment pressure has the process of formation and development,by which the behavior mechanism is explained. 通过阐明采场前方支承压力存在形成和发展过程,从形成机理上给予解释说明。并应用这一规律解释了有关矿压现象。
- Overlength isolated working face reduces the superposed influence of two sides abutment pressure on isolated working face. 超长孤岛工作面减小孤岛工作面侧向支承压力的叠加影响。
- 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. 根据煤体支承压力分布特征得到最小孤岛煤体可开采尺寸与两侧采空范围相关的结论,并给出了计算公式。
- 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. 应用弹塑性理论分析了矿山压力对急倾斜煤层顶煤破碎的作用,认为在低瓦斯急倾斜煤层中只有当顶煤在支承压力的作用下进入应力极限平衡状态时,顶煤才可放出,据此计算顶煤可能的分段高度。
- 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. 应力壳承但并传递上覆岩体荷载和压力,是最主要的承载体,应力壳拱脚处应力形成采场四周围岩支承压力。
- 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. 上山附近终采线上方老顶岩层的位态影响着煤柱支承压力的大小和上山维护的难易程度。因此,工作面终采线的位置,应尽可能确定在老顶岩层周期来压完成之后。
- 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. 运用数值模拟方法,主要分析了关键层的破断、关键层相对位置及采深等对围岩支承压力的影响;
- Filling Treatment for Back Abutment of Freeway to Changsha Airport 长沙机场高速公路台背填土的处理
- Discussion on Backfill at Back Abutment of Bridge and Culvert 对桥涵构造物台背回填的探讨
- abutment pressure of side direction 侧向支承压力
- Rose bushes shoot again after being cut back. 玫瑰丛修剪後还能再长出新枝。
- Keywords soft rock;coalface;abutment pressure; 软岩;采场;支承压力;
- He trudge three hour in the snow to get back home. 他在雪中跋涉三个钟点才回到家。
- The crowd fell back to let the players through. 人群后退让运动员们通过。
- Do exercise every day and you'll be back in condition. 每天锻炼锻炼,你很快会恢复健康的。
- The ship beat back against a monsoon. 船逆着季风艰难地行驶。
- I flap the flies away but soon they fly back. 我把苍蝇赶走,但一会儿又飞回来了。
- I never lend books; you never get them back. 我的书决不外借,因为总是有去无回。
- She leaned her head back and whispered the news. 她向后仰着头,小声说出了这个消息。
- The talks have been put back to Friday morning. 谈判推迟到星期五早上进行。