Abstract:  Aiming at the problem of wide vibration reduction of the cutting part of tunneling equipment under self-adaptive cutting control,it was proposed by applying dynamic vibration absorption technology based on magnetorheological elastomer to the vibration control of the cutting part of tunneling equipment. Firstly, the continuous miner was taken as the research object in this case,the coupling dynamics model of the cutting part-magnetorheological elastomer dynamic vibration absorber (MREDVA) was established according to the momentum moment theorem, and the vibration reduction mechanism of MREDVA was theoretically analyzed. Then, to ensure that the magnetic circuit of MREDVA and the shifted frequency characteristics of MREDVA met the requirements, the design process of MREDVA was elaborated in detail, and a new MREDVA structure was proposed, with its magnetic field and shifted frequency characteristics simulated and verified. Finally, the vibration suppression ability of MREDVA on the cutting part under different cutting conditions was calculated, and a semi-active control method was established to compare the vibration suppression ability of MREDVA under passive and semi-active vibration control methods. The research results show that for the selected coal seam 1 and coal seam 2, the amplitude attenuation of the cutting part respectively reaches 41.53% and 49.8%, for the selected coal seam 3, the amplitude attenuation of the cutting part under semi-active control can reach 45.1%. This method can effectively reduce the vibration amplitude of tunneling equipment under broadband excitation.
Key words:  underground mining machinery; tunneling equipment; vibration control; self-adaptive cutting; magnetorheological elastomer dynamic vibration absorber; semi-active control