Recently, Pan Yishan, Academician of the CAE and secretary of the UCPC, as the project leader, and Liaoning University as the supporting unit, jointly with Liaoning Technical University and North China University of Technology, applied for the national major scientific research instrument development project "Coal Mine Rock Burst Tester", which was officially funded by the National Natural Science Foundation of China, with a direct fund of 8.66 million yuan. This is the first time that Liaoning University has been approved to host the National Natural Science Foundation of China's major research instrument development project. It is another significant historical breakthrough in our university's scientific research work, and also a major landmark achievement in our university's "Double First Class" construction and the revitalization of science and engineering.
The National Major Scientific Research Instrument Development Project is a major landmark project established by the National Natural Science Foundation of China. It aims to face the forefront of science and national needs, be guided by scientific goals, strengthen top-level design, clarify key development directions, encourage and cultivate exploratory scientific research instrument development with original ideas, focus on supporting the development of original major scientific research instruments and equipment, provide more innovative means and tools for scientific research, and comprehensively enhance China's original innovation capabilities.
The "Coal Mine Impact Ground Pressure Experimental Instrument" project aims to address the practical problem of the inability to reproduce the energy accumulation and release process of impact ground pressure in the laboratory at present, and the difficulty in conducting research on the deformation, damage, and energy evolution laws of coal rock mass and support during the impact ground pressure process. It is proposed to develop a coal mine impact ground pressure experimental instrument with an energy level of tens of millions of joules. Using servo pump pressure control technology to achieve 10000kN static loading; By developing a gas-liquid accumulator group, 2.0 × 107J high-pressure oil storage can be achieved; By developing a 150000L/min ultra large flow valve, the static impulse loading conversion within 30ms can be achieved, which can output an impact force of 15000kN and release more than 1.0 × 107J of impact energy in the full stroke of 0.85m. The energy release accuracy can be controlled to reach 100J, achieving precise and quantitative energy release.
Overall composition of experimental apparatus
The development process of the experimental instrument will break through key technical difficulties such as high-energy gas-liquid energy storage, high-pressure and ultra large flow fast opening valve, and multi parameter synchronous high-speed testing. After successful development, it will be used for the study of energy accumulation, release, and absorption laws during the incubation start stop process of rockburst, as well as the study of energy absorption changes after taking water injection and drilling anti impact measures. It has remarkable scientific significance and application prospects for deepening the understanding of rockburst and achieving breakthroughs in rockburst prevention and control technology in China. It will also further enhance the level and comprehensive influence of Liaoning University in the field of disaster rock mechanics and rockburst research.
