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- steep seam coal 急倾斜煤层
- 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。
- Thin Seam Coal Mining of Steep Slope and Short Distance 急倾斜近距离薄煤层的开采
- Study on top coal caving below roof and floor in steep seam 急倾斜顶底板处顶煤放出规律研究
- Through analysing the parameters,construction,designing principle of MG300BW type thin seam coal winning,this paper discusses its developing vista in extremum thin seam winning. 通过对MG300BW型薄煤层采煤机的参数、结构设计原理进行分析,论述在薄煤层开采中的发展前景。
- All coal faces at the northen of Datong Mining Bureau Yungang Mine because of their development process of geologic structure have to down steep seams and pass through faults. 针对大同矿务局云冈矿井田北部断层等地质构造发育的特点,从开采方法和采煤工艺上进行了探讨和论证。
- The paper introduced the development, design and structure of the thin seam coal shearer with an electric magnetic sliding differential speed control in detail. 详细介绍了电磁滑差调速薄煤层采煤机的开发设计思路、结构特点;
- Probing into Caving Method of Roadway in Steep Seam 急倾斜煤层巷道放顶煤采煤法的探索
- Rock movement law of horizontal section top coal caving in steep seam 急倾斜水平分段放顶煤开采岩移规律
- Action mechanism analyzing of gas pressure in the top coal caving of steep seam 瓦斯压力对急倾斜煤层放顶煤的作用机理分析
- There was a steep climb on the road out of town. 市外公路上有一处很陡的上坡路。
- Preventive Measures for Waste Fall in Longwall Faee of Steep Seam 急倾斜煤层长壁回采工作面窜矸防治措施
- Do you think you can climb that steep cliff? 你以为你能爬上那座悬崖峭壁吗?
- Let the tea leaves steep in boiling water for five minutes. 让茶叶在滚开的水中浸泡五分钟。
- Repetitive mining subsidence with thick soil layers and steep seam 厚冲积层急倾斜煤层群开采重复采动下的开采沉陷
- Some problems of flexible shield mining in steep seam 急倾斜柔掩面几个主要问题剖析及对策
- That overloaded truck jibbed at the steep hill. 那辆超载的卡车爬不上陡坡。
- Thin seam coal shearer with electric magnetic speed control haulage 电磁调速电牵引薄煤层采煤机
- The climber had to negotiate a steep rock face. 那攀登者得攀越一陡峭岩石。
- The mountain rise up in a steep wall of rock. 这座山高而陡,形成一道岩石屏障。