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- Study on Comprehensive Fire Preventing and Extinguishing Technique of Simple Cutting Top Coal Dropping of Complicated and Difficult Cutting Coal Bed with High Gas 复杂难采高瓦斯煤层简易放顶煤开采综合防灭火技术研究
- top coal dropping 放顶煤
- SZ), now had to face the agony of coal dropped. SZ)，如今不得不面对煤价大幅下跌的苦恼。
- The measures against coal arch camber in planomural coal bin and coal drop pipe are proposed by analyzing practical cases. 通过实例分析，提出了解决煤仓及落煤管落煤起拱的措施。
- The influencing factors of coal arch camber in planomural coal bin and coal drop pipe with rectangular or circular cross section during coal drop are studied theoretically. 摘要对落煤过程中平壁煤仓及截面形状分别为矩形、圆形的落煤管起拱的影响因素进行理论研究。
- The top coal broken mechanism and reasonable determination of caving coal heigh in caving coal faces are expounded. 主要阐述了放顶煤工作面顶煤破碎机理及放煤高度的合理确定;
- It is key problem to raise the top coal recovery rate of the fully mechanized sublevel caving mining. 提高顶煤放出率是综放开采的一个重大课题,预注水弱化顶煤是解决这一问题的有效方法之一。
- Practices have proved that quick advancing techniqe is applicable in isolated unmined area Comprehensive top coal caving face. 实践证明,孤岛综放工作面快速推进技术是可行的。
- The caving of hard top coal of 4-2# coal seam in Tongchuan Jiaoping Coal Mining Area seriously impacts the production efficiency of the mine. 铜川焦坪矿区4-2%23煤层坚硬顶煤垮落破碎难题是严重影响矿井生产效益的"瓶颈"。
- This article introduced applications,observation and research's actuality and developing trend of fully mechanized top coal caving mining under water. 介绍放顶煤开采技术在水体下采煤领域中的应用情况、观测研究现状及其发展趋势。
- In 1997, the Xingtai Mine succeeded in using bolting &boltmesh supporting tech. in coal roadway(supporting the top coal along the bottom). 1997年，邢台矿在全煤（沿底托顶煤）巷道采用锚杆加锚索的支护技术获得成功。
- The law of top coal movement on a fully mechanized longwall face with top coal caving wasanalysed thoroughly on the basis of field observation andfinite element calculation. 本文根据现场观测、数值计算以及理论分析,详细阐述了放顶煤采场的顶煤变形运动规律,指出了顶煤变形运动可划分成四个区:顶煤变形区,压裂区,松动区和放落区。
- In early application of fully mechanized top coal mining,Spontaneous fire took place when the backout of fully mechanized top coal caving face was stopped mining. 在应用综放开采的初期,每当综放工作面停采回撤时,就会发生自燃发火。
- 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。
- Taken Xinhe Colliery 3101 workface as the concrete condition, phenomenon law of underground pressure in great-inclined thick coal seam mechanized top coal caving is studied. 本文以新河煤矿3101工作面为具体条件，研究了大倾角厚煤层综放开采矿压显现规律。
- Using modified distinct element method, simulation research is conducted on top coal movement at fully -mechanized working face in No2 Coalmine of Dayan Coal Bureau. 用改进的离散元法对大雁矿务局二矿综采放顶煤工作面顶煤活动规律进行模拟研究,分析支架围岩作用关系,找到顶煤丢失原因。
- The Fracture Analysis of 125 chain of the chain-bucket coal drop 链斗式卸煤机125链条断裂分析
- A man of great ability like him will eventually reach the top. 像他这样才能出众的人终究会升到最上层的。
- The key point of Grand pressure law on working face of seam top coal caving method,the method of dealing with them,firstly caving and end caving of working face roof control are discussed. 论述了中厚煤层综采放顶煤工作面矿压显现规律和顶板管理的特点,指出了综放工作面顶板管理的方法,以及工作面初采、收作时顶板管理的要点。
- The top coal's recovery ratio in fully-mechanized sublevel caving face controls the stowing degree of the goaf, thereby influences the stability of hard and massive overlying roof. 摘要综放采场顶煤放出率控制着采空区的充填状况，从而影响着大厚度坚硬顶板的稳定性。
