QD型切顶支架简介:它是介于单体液压支柱和自移支架之间的一种新型支护方式。切顶支架是由切顶支柱、推移千斤顶,连结元件等并与泵站工作面管路系统所组成的。工作介质为1～2%的乳化液。工作面可采用3—4排或4—5排控顶,与金属摩擦支柱或单体液压支柱配套使用。由于切顶支柱有较大的顶盖和底座,因此它对顶、底板的比压很小,不会产生“插底”现象。同时可以取消密集支柱,矸石 QD-type cut-top stent Description: It is between the hydraulic prop and self-moving stent between a new type of support. Top-cut support is composed of cut-top pillars, pushing jacks, connecting elements, etc., and with the pumping station face piping system. Working medium is 1 ~ 2% of the emulsion. Working surface can be 3-4 rows or 4-5 row control top, and metal friction strut or single hydraulic prop supporting the use of. As a result of the roof cut off a larger roof and base, so it on the top, the floor of the pressure is very small, does not produce “plug in” phenomenon. At the same time you can cancel the dense pillar, waste rock