恒阻大变形锚索力学特性及其在深部切顶留巷中的应用

为解决深部围岩变形量大、常规支护材料易破断失效的问题，对恒阻大变形锚索结构、工作原理及力学特性进行了研究。室内试验结果显示：恒阻锚索在静力拉伸和动力冲击过程中均能保持 350kN 的恒定工作阻力，显示了恒阻锚索良好的抵抗冲击、恒阻吸能特性。将恒阻锚索应用到深部切顶留巷工程中，留巷期间恒阻锚索大部分都产生一定的缩进量，较好地吸收了深部围岩变形能量，留巷围岩在滞后工作面约300m 时达到稳定状态，各项指标均能满足现场使用要求，恒阻锚索较好地控制了深部留巷围岩变形，从而验证了恒阻锚索支护的可靠性。

Mechanical characteristics of constant resistance and large deformation anchor rope and its application in deep gob-side entry retaining by cutting roof

In order to solve the problems that the large deformation of deep surrounding-rock and the conventional support materials are easy to break and fail, the structure, working principle and mechanical characteristics of the constant resistance and large deformation anchor rope are studied. The indoor test results show that the constant resistance anchor rope can maintain a constant working resistance of 350kN during static tensile and power impact, which shows the good resistance impact of the constant resistance anchor rope and the constant resistance suction energy characteristics. The constant resistance anchor rope is applied to the deep gob-side entry retaining by cutting roof, most of the constant resistance anchor ropes produce a certain indentation，which shows the constant resistance anchor ropes absorb the deformation energy of the surrounding rock well. The surrounding-rock of gob-side entry retaining achieve stability about 300m behind the work surface, all indicators can meet the requirements of on-site use. The surrounding-rock deformation of the deep gob-side entry retaining by cutting roof is controlled well by the constant resistance and large deformation anchor rope，thus the reliability of constant resistance anchor rope support is verified.