以前,立井井口阻车器与罐笼未施行联锁,罐笼未达井口正常停止位置时,阻车器随时可以打开,阻车器未关闭时,绞车仍能运行。这样,若井口把钩工误操作或有其它意外原因,就会造成矿车坠入井筒的事故。尽管该类事故的次数较少,但破坏性极大。轻者车毁梁折,重者如果恰在罐笼提人之时,矿车坠入井筒就会造成恶性伤亡事故。例如,我矿在1980年2月22日,由于井口阻车器未关闭,工人用电机车向井口顶空车,结果 In the past, the vertical wellhead mouth car stop did not interlock with the cage. When the cage did not reach the normal stop position of the well head, the stop car could be opened at any time. When the stop car stopped, the winch could still run. In this way, if the wellhead to hook workers misuse or other unexpected reasons, it will cause the tub to fall into the wellbore accident. Although the number of such incidents is small, it is devastating. The light car destroyed Liangzhu, heavy case if it is just in the cage when the car sink into the wellbore will cause a vicious casualties. For example, my mine on February 22, 1980, because the wellhead car stop is not closed, the workers use electric locomotive to the head of the wellhead car, the result