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| DEVELOPMENT OF GAS-LIQUID COMPOSITE LOADER FOR ROCKBURST SIMULATION |
| HE Yongsheng1，DING Xingbo1，2，MING Zhiqing1，FAN Junqi1，PANG Weibin1 |
(1. The Third Research Institute of the Corps of Engineering，General Staff of PLA，Luoyang，Henan 471023，China；
2. School of Mechanical and Electrical Engineering，Harbin Institute of Technology，Harbin，Heilongjiang 150001，China) |
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Abstract A special gas-liquid composite fast-compensating loader for rockburst simulation is developed，and its design principles and technical characteristics are introduced. The loader which has four cavities simulates rockburst by using adiabatic expansion of compressed gas in energy storage cavity for fast-compensating pressure fall at failure of sample. Result shows that the loader has good capability in high rigidity，stable operation performance and reliable high-speed sealing. The key issues could be solved including eliminating back pressure in return cavity，preventing gas from getting into hydraulic cavity and sealing high-speed guide. It can realize rockburst modeling in different intensity degree under the condition of uniaxial loading. Moreover，some issues of loader in further study are discussed.
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Received: 28 June 2013
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2014, Vol. 33 
