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1·This article summarizes the reasons of common breakdowns in the operation of hydraulic haulage shearer and provides the reliable basis for the trouble diagnosis and elimination of the haulage device.

对煤矿液压牵引采煤机工作中常见故障的原因及处理方法进行了总结 ，为今后牵引部故障的诊断和排除提供了可靠的依据。

2·The paper introduced the haulage speed regulating device of the electric magnetic speed regulating electric haulage coal shearer with MC68HC05B6 microcomputer.

提出了基于单片微型计算机MC 68hc05 B6的电磁调速电牵引采煤机牵引调速装置。