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在分析和实验基础上论述了架型、支柱柱数、柱腿倾角、工作阻力及端面距对控顶效果的影响，并由美国矿井生产实例印证了在易破碎顶板条件下，二柱掩护式支架控顶效果较好。
Based on the analysis and experiment, the effects of frame type, column number, column leg inclination, working resistance and end face distance on the top control effect are discussed. The case of US mine production confirms that under the conditions of frangible roof, Bracket control the top effect is better.