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四连杆掩护式支架和支撑掩护式支架的出现,对于大多数中等稳定或不稳定顶板的综采式作面的顶板管理都起到了积极的作用,可以说这是支架性能改革上的一个飞跃。一、四连杆掩护机构支架的主要优、缺点
The appearance of the four-link shield support and the support shield has played a positive role in the roof management of fully mechanized mining face with most moderately stable or unstable roofs, which can be said to be a leap forward in the performance reform of the scaffolds . One, four-link cover the main advantages and disadvantages of stent