Theory and application of self-adaptive support for advanced powered support

Aiming at the problem that the existing advanced powered support repeatedly supports and destroys the roof and anchorage system of roadway,the concepts of advanced support,transformation matrix and peak boost of advance powered support are put forward. The definition of self-adaptive support for advanced powered support is given. Ac- cording to the difference of structure and control mode,the self-adaptive support of advance support is divided into three types:self-adaptive support resistance,self-adaptive support attitude and self-adaptive walking mode. Combined with the specific structural characteristics,the above three adaptive types are further divided. Self-adaptive support re- sistance is divided into self-adaptive distribution of setting load and self-adaptive lifting or descending leg during set- ting load state. Self-adaptive support attitude is divided into self-adaptive canopy attitude and overall self-adaptive support state. Self-adaptive support mode is divided into self-adaptive advancing mode and self-adaptive walking mode. The principle and realization method of self-adaptive support for advance powered support are introduced. The quanti- tative relationship of adaptive canopy structure is established by the method of linear algebra, the adaptive control method of working pressure is given by the theory of hydraulic transmission and control,the simulation model of leg po- sition and pressure control loop is built and simulated by the AMESim,and the self-adaptive moving mode and walking method of the omnidirectional walking advanced powered support ( OWAPS) are explained by the principle of kine- matics. The test results show that the adaptive structure and device greatly improve the adaptability of the powered sup- port,effectively solve the problem of coordination and matching between the advance support and the roadway roof and bolting system,and improve the adaptability of the advance support to the changes of the roadway surrounding rock.