采煤机与掘进机等大型设备在使用中由于受力较大,经常发生联接螺栓齐根切断的现象。由于井下防爆的要求,现场不能使用电钻等工具,往往要把设备上井进行处理,既浪费人力物力,又影响生产。为了解决这一问题,根据采掘面液压管路随处 Shearer and boring machine and other large equipment in use because of the larger force, often happen to cut the bolt together root phenomenon. Due to the requirements of underground explosion-proof, the scene can not use tools such as electric drills, and often the equipment should be well processed, which not only wastes human and material resources but also affects the production. In order to solve this problem, according to the excavation surface hydraulic piping everywhere