ZY12000/15/38D大伸缩比液压支架的选型与设计关键技术研究

Research on Key Technology of Selection and Design of ZY12000/15/38D Hydraulic Support with Large Expansion Ratio

为解决综采工作面煤层赋存厚度频繁变化或有断层需要穿过时资源回收率低、开采效率不高的难题,以陕北某矿为目标进行了ZY12000/15/38D型大伸缩比液压支架选型,针对大伸缩比液压支架设计进行了四连杆机构、掩护梁结构、顶梁前部机构、梁端距调节、全封闭挡矸、液压系统排布、三伸缩立柱等关键技术研究,并进行了大伸缩比液压支架的井下工业性应用,产量最大达到2万t/d,实现了煤矿的高产高效,同时提高煤炭资源的回收率至97%以上,创造了巨大的经济效益和社会效益。通过大伸缩比液压支架的研究和应用,为厚度变化较大煤层高效、高回收开采提供了有效解决方案和装备保障,有力地推动了煤炭行业的技术进步和可持续发展。

In order to solve the problems of low resource recovery rate and low mining efficiency when the occurrence thickness of coal seams in fully mechanized mining faces changes frequently or there are faults that need to pass through,the ZY12000/15/38D type hydraulic support with large expansion ratio was selected for a mine in northern Shaanxi.For the design of the hydraulic support with large expansion ratio,four-link mechanism,shield beam structure,roof beam front mechanism,beam end distance adjustment,fully closed gangue retaining,hydraulic system layout and three telescoping columns key technologies have been studied,and industrial applications of hydraulic support with large telescoping ratios have been conducted underground.The maximum output has reached 20000 t/d,achieves high production and efficiency in coal mine,while improves the recovery rate of coal resources to over 97%,creates enormous economic and social benefits.Through the research and application of large expansion ratio hydraulic support,effective solutions and equipment support have been provided for efficient and high recovery mining in coal seam with large thickness changes,effectively promotes the sustainable development and technological progress of the coal industry.