外文翻译-综采工作面顶板突水的分析与控制.doc

1、英文原文Analysis and control on anomaly water inrush in roof of fully-mechanized mining fieldPeng Linjun a,b,c, Yang Xiaojie a,c, Sun Xiaoming a,ca School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing 100083,Chinab Academician Pioneering Park, Dalian University, Da

2、lian 116622, Chinac State Key Laboratory of Geomechanics and Deep Underground Engineering, China University of Mining &Technology, Beijing 100083, ChinaAbstract: Caving of mine roofs from water inrush due to anomalous pressure is one of the major disasters and accidents that can occur in mines durin

3、g production. Roof water inrush can trigger a wide range of roof collapse, causing major accidents from breaking roof supports while caving. These failures flood wells and do a great deal of damage to mines and endanger mine safety. Our objective is to analyze the anomalies of water inrush crushing

4、the support at the #6301 working face in the Jisan Coal Mine of the Yanzhou Mining Group. Through information of water inrush to the roof, damage caused by tectonic movements, information on the damage caused by roof collapse and the theory about the distribution of pressure in mine abutments, we ad

5、vice adjusting the length of the working face and the position of open-off cut relatively to the rich water area. In the case of anomalous roof pressure we should develop a state equation to estimate preventive measures with “transferring rock beam” theory. Simultaneously,we improve the capacity of

6、drainage equipment and ensured adequate water retention at the storehouse.These are all major technologies to ensure the control and prevention against accidents caused by anomalous water inrush in roofs, thus ensuring safety in the production process of a coal mine. Keywords: Roof;Water inrush pres

7、sure;Anomaly;Analysis;Control;abstract;Caving1. IntroductionBoth domestic and foreign investigators pay considerable attention to coal mine pressure anomalies and obtained various results. However, because of the complexity of anomalous pressure, as well as the mutability of surrounding rock conditi

8、ons caused by caving, a number of difficulties are encountered in building an exact and systematic mathematical mechanical model. Furthermore, because geological conditions differ considerably in various parts of a coalfield and the reality is very complex, we must therefore adopt a number of differ

9、ent measures and methods to predict and monitor geological conditions, given that many methods have their own limitations. The process of calculation for the support of the surrounding rock summarizes this mechanism, thus perfecting the method of forecasting and monitoring, forming a feasible and ef

10、ficient system for safety in production, ensuring security and efficiency at coal mining faces. Coal mine pressure anomalies, showing up in fully-mechanized caving fields, as dynamic phenomena interfering with safe production in coal mines, refer to anomalous rock pressure occurring under special co

11、nditions. When the mechanical balance is broken in a coal (rock) body around a coal mining field, it usually shows up as damage to the support system, as a crushed or sinking roof level or as severe spalling, before the occurrence of risky leaks and ultimately coal and gas outbursts. When rock press

12、ure appears as anomalies, it often results in damage to equipment, significant loss of coal resources and forming simultaneously significant security risks, which in coal mines may lead to devastating consequences. In recent years, a large number of mine pressure anomalies occurred in fully-mechaniz

13、ed caving mines in Chinas Yanzhou and Xuzhou mining areas, causing considerable economic losses to coal companies. Therefore, further systematic study of the structure and movement of the overlying rock in fully-mechanized caving mines, may reveal the behavior of mine pressure anomalies, discover th

14、e conditions under which these anomalies occur, find methods to forecast and prevent them, in order to achieve safety and efficient production. 2. Coal seam conditions and structure of overlying rockThe Jisan Coal Mine is located in a suburb of Jining city, where the mining area is about 110 km2. Ge

15、ological reserves of 880 million tons, industrial reserves of 800 million tons, and recoverable reserves of 530 million tons have been confirmed. The #3 coal layer has 400 million tons of coal, accounting for 75.5% of recoverable reserves. These coal strata are part of the Permian Shanxi Formation a

16、nd the Carboniferous Taiyuan, with eight layers of locally accessible coal and an average thickness of 10.44m. Themajor recoverable coal is found in the 3up, 3down layer with an average thickness of 6.21 m. The geological condition of the mining area is a simple middle structure. The main northesouth normal fault is apparently regular, with most of the east rising and the west falling. Also, there are faults showing the development of eastewest with the east and southe