为解决宁东矿区羊场湾煤矿15～20°倾角复杂煤层条件下6.2 m采高支架稳定性控制难问题,对该工作面大采高支架运行情况进行了现场监测与分析。结果表明:大采高支架工作阻力呈非线性演化规律,沿煤层倾角降低方向,中下部压力较小,非来压时支架工作阻力为6 880.9 kN,工作面中上部顶板压力较大,支架平均工作阻力9 343.7 kN,满足设计要求。现场开采过程中采用留设顶煤等措施,保持顶板完整性,减缓顶板破断岩石对支架的冲击性破坏,保障了现场支架正常运行和安全连续开采。

In order to solve the stability control difficulty problem of the 6.2 m high cutting hydraulic powered support under the 1520° inclined complicated seam co nditions in Yangchangwan Mine of Ningdong Mining Area, a site monitoring and measuring as well as analysis was conducted on the operation conditions of the high cu tting hydraulic powered support in the coal mining face. The work resistance nonlinear evolution law of the high cutting hydraulic powered support was obtained.Along wi th the inclination reduced direction of the seam, the pressure at the meddle and low section would be low and the work resistance of the powered support would be 6 88 0.9 kN when the roof was not pressurized.When the roof pressure at middle and top section of the coal mining face was high, the average work resistance of the power ed support would be 9 343.7 kN, which could meet the design requirements.During the site mining process, the top coal left and other measures was provided in order t 0 keep the roof in completed, to reduce the roof broken rock causeing the bumping failure to the powered supports and to ensure the normal operation and safety contin ued mining of the site powered support.

国家自然科学基金资助项目(10402033,10772144)；教育部博士点基金资助项目(20096121110001)；陕西省重点实验室资助项目(09JS018)；