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- 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。
- side abutment pressure 边墩压力
- In order to study the dip strata displacement and side abutment phenomenon law in incline fully mechanized coal face we observed phenomenon of underground pressure in co. 为了研究倾斜综放采场倾向岩层运动与侧向支承压力显现规律,布置了覆岩破坏测区和侧向支承压力测区。
- abutment pressure of side direction 侧向支承压力
- 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。
- 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。
- The conclusion is that the peak value of the side abutment stress in the mining face is dropped down and its influence range is reduced with the increasing of the weakened degree of the gat... 研究结果表明,随着对顺槽顶板岩石弱化程度的提高,工作面侧向支承应力峰值降低,影响范围减小。即工作面侧向巷道的稳定性将随着对顺槽顶板硬岩层的弱化程度提高而得到有效改善。
- 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;
- Keywords soft rock;coalface;abutment pressure; 软岩;采场;支承压力;
- The deer was peppered with shot all down one side. 那只死鹿的半边身子都被子弹击中。
- The ship kept the buoy on her off side. 这条船在浮标的左边。
- The little boy skipped along at his mother's side. 那个小男孩在他母亲身边跳跳蹦蹦地往前走。
- The comedy tine was cut out as being off side. 笑料由于低级趣味而被删去。
- The farm sits on the side of the hill. 农场位于山坡上。
- She turned the chair on its side to repair it. 她把椅子翻转过来修理。
- You've got your sweater on wrong side out. 你穿的毛衣里儿冲外了。
- She looked small by the side of her companion. 她和她的同伴在一起时,她显得矮小。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries