Based on many years research of broken rock zone the paper describes roadway support theory, classification of rocks in the loose rock zone and mechanism of rock-bolting and shotcreting.
基于多年对围岩松动圈的研究成果，本文提出并论述了松动圈支护理论、松动圈围岩分类方法和锚喷支护机理三个问题。
Field and lab tests show that interaction between rocks and earth pressure produce different size of broken rock zone;
现场实践和实验室研究表明：地应力与围岩的相互作用会产生大小不同的围岩松动圈；
There are many factors which can influence the stress of surrounding rocks. Broken zone is a very important factor.
围岩应力受诸多因素的影响，松动圈是重要的影响因素之一。
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