岩爆灾害控制的动静组合支护原理及初步应用

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Abstract There are certain limitations in the current theory of rockburst supporting based on static rock mechanics. The dynamical mechanism of rockburst caused by the external disturbance and the surrounding rock itself was discussed from the perspective of structural effect of surrounding rock. The external disturbance may easily lead to the damage of the elastic rock zone adjacent to the broken rock zone because of the reflection wave of stresses. Rockburst can be regarded as the adjustment process of self-sustained time-varying structure of surrounding rock under certain conditions. A principle of controlling the time-varying the structure in supporting was put forward. With the present supporting measures，the surface rocks of underground cavern would spall and peel and the bolt pallets would hang in the air after the happening of rockbursts. A static-dynamic combined supporting method to control the rockburst disaster was put forward with the key techniques of anchoring reservation and static-dynamic combined bolts. The extensible components of bolts should be installed in the vicinity of the elastic rock zone and in the broken rock zone；so that enough spaces may be provided for the dilatancy and deformation of rocks in elastic zone damaged by the reflected stress waves. Meanwhile，the tail of the anchoring rod can strengthen the broken zone rock. The preliminary application to a deep rockburst roadway，it is proved that the new technology of supporting is effective in the prevention of rockburst.

Key words： rock mechanics rockburst static-dynamic combined support anchoring reservation mechanism of dynamics

Received: 16 August 2013

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https://rockmech.whrsm.ac.cn/EN/Y2014/V33/I6/1169

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