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6301综放工作面是兖州矿业(集团)公司济宁三号煤矿六采区首采工作面。该工作面推进1 426 m时,中班接班后发现顶板压力增大,支架活柱行程明显减少。现场测量41#支架活柱1 h下降120 mm。由于液压
6301 fully mechanized caving face is Yanan Mining (Group) Company Jining No.3 coal mining area first mining face. When the working face was advanced to 1 426 m, the roof pressure was found to increase after the mid-shift shift, and the stroke of the stent live column was obviously reduced. On-site measurement of 41 # scaffolding column dropped 120 mm 1 h. Due to hydraulic pressure