刨煤机回采工艺决定了刨煤机的工作方式,其顶煤可自行塌落。在这种条件下,刨煤机的高度通常要小于煤层厚度。但是,在工作面开采初期直到老顶初次放顶以前,地压破煤现象不明显,顶煤呈悬挂状态,并且需要额外采取措施方能使其冒落。 矿井调查表明,若按着刨煤机高度进行回采时,顶煤下部会发生夹住刨煤机构的现象,这就会使刨煤机传动装置的功率消耗及牵引力平均增加10％(个别情况下可增加20％)。 在这种条件下,刨煤机工作时,常常会卡住刨煤机构。使刨煤机构的安全装置动作(刨齿折断),就是说,牵引机构会出现比正常下高2—4倍的峰值力。因而,刨煤机牵引机构的工作情况恶化,大大降低其可靠性。 Plow mining process determines the plow work, the top coal can collapse themselves. Under these conditions, the height of the plow is usually less than the thickness of the coal seam. However, before the initial caving of the working face, the phenomenon of ground-breaking coal was not obvious until the roof was first top-capping. The top coal was suspended and additional measures were needed to make it fall. Mine surveys have shown that when plows are pumped at a height of plows, the plow mechanism is caught in the lower part of the top coal, which increases the power consumption and traction of the plow drive by an average of 10% (in some cases Can increase 20%). Under such conditions, plows often get stuck in plow work while they are working. The plow mechanism safety device action (gear teeth broken), that is, the traction mechanism will appear 2-4 times higher than normal peak force. As a result, the working conditions of the plow traction mechanism deteriorate, greatly reducing its reliability.