Abstract:

Based on analysis of 12 on 101-2 mining face practice in Ha Lagou coal mine of Shendong mine area, pressure law, working resistance of support, the problems encountered in the mining and economic and mining technology efficiency were analyzed and summarized of the first 450 meters overlong fully mechanized mining face. The results show that: the first pressure behavior presents a segments characteristics and being of strong pressure behavior. The size of cycle exists and the pressure distribution along the face presented “three peak W-type” characteristics. The ahead affect scope and impact of two crossheading in the 450 meters overlong face are similar to the general length face. The reasonable support resistance of 12 on 101-2 face is 10569kN and the adopted supports are able to meet the requirements of the supporting. The tunneling rate is significantly reduced, recovery rate, ergonomics and the annual output is significantly improved in 450 meters overlong face. Safe and efficient mining technical support is provided for similar conditions in Shendong mine area.

Key words: overlong fully mechanized mining face, pressure law, support working resistance, technical and economic benefits, safe mining