布尔台煤矿厚煤层大采高液压支架适应性分析

Adaptability Analysis on High Cutting Hydraulic Powered Support Applied to Thick Seam in Buertai Mine

为得到神东矿区北部中等埋深厚煤层大采高工作面矿压显现规律、液压支架合理工作阻力及分析支架适应性,对布尔台煤矿42102-1大采高综采工作面的矿压显现及液压支架工作阻力进行观测,计算得到该工作面顶板结构及运动特征参数,提出了考虑支架实际使用效果的"三因素法",即从"支"、"护"、"采"三方面评价支架适应性,应用岩石自重经验估算法、实测支架循环末工作阻力加1倍均方差和传递岩梁理论这3种方法,计算得出该工作面的支架合理工作阻力均为16 000 kN,应用结果表明:现有ZY10800/28/63支架工作阻力过小不能适应该矿中等埋深大采高的开采条件,须重新选择合理支架。

In order to have a mine strata pressure behavior law of a high cutting coal mining face in a thick seam with medium depth,ra-tional working resistance of powered support in a north part of Shendong Mining Area and to analyze the adaptability of the powered sup-port,an observation was conducted on the mine strata pressure behavior of No.42102-1 high cutting fully-mechanized coal mining face in Buertai Mine and the working resistance of the powered support.Roof structure and movement feature parameters of the coal mining face were obtained with a calculation.A three factor method to consider actual application effect of the powered support was provided.An adapta-bility of the powered support was evaluated from support,maintenance and mining aspects.A rock deadweight experiment estimation meth-od,a site measurement of the powered support working resistance at an end-of-cycle plus one times of mean square error and transmission rock beam theory were applied to calculate and obtain an rational working resistances of the powered support and the coal mining face and the rational working resistances were all 16 000 kN.The application results showed that the working resistance of the available ZY10800/28/ 63 powered support was too small and could not be suitable to the high cutting mining conditions with medium depth.A rational powered support should be selected.