Research on automatic control technology of large mining height hydraulic support

In view of problems of high roof pressure, serious spalling and roof falling and instable support in production of large height mining face, demands of automation control technology of the large mining height hydraulic support were analyzed. The automatic control technologies of large mining height hydraulic support were researched from roof, coal slip wall management of working face, anti-skid and anti-dumping control of hydraulic support, multi-level linkage control of face guard, intelligent following control of hydraulic support: the support force of hydraulic support on working face roof was reached setting load adopting hydraulic support automatic shift control and automatic pressure compensation technology, so as to realize effective management for the working face roof; management efficiency of coal wall on working face was effectively improved by attitude control and support pressure control of face guard, rib spalling accident was prevented; pseudo inclined automatic control of hydraulic support on working face was realized by using angle sensors, distance sensor and laser sensor to detect support attitude; logic control of multi-stage face guard was realized by installed proximity sensor on face guard; position detection of shearer was used infrared sensors, automatic following control of large mining height hydraulic support was realized according to the coal mining process.