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简述锚杆支护悬吊理论作用原理。

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正确答案:

锚杆支护的作用就是将巷道顶板较软弱岩层悬吊在上部稳定岩层上,以增强软弱岩层的稳定性。对于回采巷道经常遇到的层状岩体,当巷道开挖后,直接顶因弯曲变形与老顶分离,如果锚杆及时将直接顶挤压并悬吊在老顶上,就能减少和限制直接顶的下沉和离层,以达到支护的目的。

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