日本根据国外的使用情况研制了自己的无链牵引采煤机,样机于1979.8.9～1979.12.29采完了第一个工作面;于1980.1.30～1980.4.15采完了第二个工作面;自1980.6月开始采第三个工作面。这台样机起初在井下试验时有过不少故障,后来会同设计、制造、使用方面的有关人员研究改进。使样机更能适应现场的要求,显示出安全可靠等优越性。 Japan developed its own chain-free haulage shearer according to the overseas use situation. The first working face was picked up by the prototype from 1979.8.9 to 1979.12.29; the second face was taken from 1980.1.30 to 1980.4.15; The third face was started in June. At first, this prototype had many faults in downhole tests, and later it was improved along with the research, design, manufacture and use of related personnel. So that the prototype can better meet the requirements of the scene, showing the advantages of safety and reliability.