011604综采放顶煤工作面的转采实践与探讨

011604 fully mechanized top coal caving face round mining practice and discussion

倾斜长臂综采放顶煤工作面,转采角23°,转采工艺的设计及转采时的斜切比例,对控制前后刮板机、支架下滑采取的安全措施和拐点扩帮区域有着特殊的支护。根据上下巷两拐点不在同一素线的情况,确定上巷推进越过拐点的超前距离。选择工作面以外的旋转中心,是为了克服长短刀推进时给工作面带来的困难和影响,以及对工作面工程质量的影响,同时也加大了长短刀的比例。通过割煤、推移刮板机的方向和拉支架的顺序,控制前后刮板机上下窜量,以保证两机头的接煤效果。按计算出的拐点扩帮量,估算了顶板的压力,选择了转角处分两次扩帮、锚杆锚索外加单体支柱和木垛的支护方式和方法,确保了顶板的稳定和安全。

Slant long arm of fully mechanized top coal caving face with a face length rotating mining angle 23°, the design of rotating mining craft and beveling proportion control front and back scraper and stent decline, take special support for inflection point expanding state regional. According to the upper and lower lane inflection points are not in the same line, confirm the ad- vance distance across the inflection point lane. Choose the center of rotation outside working face to overcome the difficulties and influence that long-short knife takes to working, as well as engineering quality while boosting, but also increased the proportion of long-short knife. By cutting coal scraper, change bracket direction and limb frame sequence, control before and after the scraper shift to ensure coal receiving effect, estimating the roof pressure according to inflection point expansion amount, choose a support way and method on two times expansion angle of rock bolt anchor rope coupled with single prop and wood block at the comer, to ensure the stability and security of the roof.