针对大倾角旋转俯伪斜大采高综采面液压支架稳定性控制特点,结合潘二矿12124综采工作面地质与工程条件,开展了破碎顶板和软煤条件液压支架与刮板输送机稳定性控制机理与方法研究。基于现场观测数据分析,构建了大倾角综采工作面液压支架倾倒与下滑两种失稳模式,对比分析了支架受力特征,揭示了支架失稳与煤层倾角、支架顶梁和直接顶的摩擦因数之间的关系。推导了液压支架带压移架的"带压临界值",提出了铺金属网带压擦顶追机移架方法。综合分析设计了旋采段回采调斜比例为1∶3,并确定了俯伪斜回采段输送机下滑量不应大于304 mm,并通过设置了防倒、防滑千斤顶的"三机"联合防倒滑措施,有效控制"三机"稳定性及片帮、冒顶,实现了大倾角厚煤层安全高效开采。

In terms of the characteristics of stability control of hydraulic support under the condition of the fully mech- anized working face with large seam dip angle,rotating,large mining height and false bow oblique,and combining with the geological and engineering conditions of fully mechanized working face numbered 12124 in Pan’er Mine,this pa- per studies the mechanism and method of stability control of broken roof and hydraulic support and scraper conveyor under soft coal conditions. Based on the analysis of field observation data,two instability modes including the dumping and falling of hydraulic support in fully mechanized working face with large dip angle are constructed to analyze the force characteristics of the supports by comparison. The relationships between the instability of the supports and seam dip angle,beam of support,the friction coefficient of the direct top are revealed. Then " threshold with pressure" of moving hydraulic support with pressure is derived,and the method of moving support with load,laying metal net,con- tacting roof and chasing coal winning machine are provided. The ratio of adjusting oblique in the rotating mining area is designed to be 1 ∶ 3 by comprehensive analysis,and the decline value of conveyor in bow pseudo-inclined mining area is determined to be less than 304 mm. With the measures of preventing sliding and falling of “ three machine” which are installed jack with preventing sliding and falling,and the effective control on the “three machine” stability, wall caving and roof falling,the safety and high efficient mining of thick coal seam with large seam dip angle are real- ized.