Coal Mining and Design Department,Tiandi Science & Technology Co.,Ltd.

介绍了放顶煤液压支架的现状和发展趋势,通过与四柱放顶煤液压支架进行对比分析,认为两柱式放顶煤液压支架前端支顶力大,控制煤壁片帮和架前冒顶能力强;顶梁位态调整幅度大,适应外载变化和自身调节能力强;易于实现自动化控制;同等宽度支架可达到的工作阻力低。阐述了两柱放顶煤支架近几年创新发展的新成果:提高两柱式放顶煤液压支架的极限工作阻力;开发自动化放煤系统;提升钢板性能,降低液压支架质量;认为两柱式大采高强力放顶煤支架将成为大采高自动化综放工作面的首选架型。

The paper introduces the current status and developing trend of the two- legs shield powerful caving coal hydraulic support for large mining height face. Wit h the comparison and analysis of the four- legs shield,the two- legs shield has the following advantages: firstly,having stronger supporting forces at the front end of shield a nd better ability for controlling the coal wall slide and roof falling; secondly,the top beam can adjust its position in a larger range and has the stronger ability to adapt to the external load changes and then adjust itself correspondingly; third,easily achieving the automatic control,forth,lower yield load compared with same width of four- leg shiel d. Furthermore,this paper also stated the new achievements of two- legs shield in recent years as follows: first,the ultimate yield load of two- legs shield was increased,sec ond,automatic system was developed ,third,the shield's steel performance was upgraded and then the shield weight was reduced. Finally,it gets the conclusion that the two- legs shield powerful caving coal hydraulic support for large mining height face will become the first choice for the high- seam automatic longwall top coal caving face.

国家高技术研究发展计划(863计划)资助项目(2012AA06A407)；