一、引言赤平煤矿地质构造非常复杂,是日本的急倾斜矿井之一,自开采以来,其赋存的急倾斜煤层已给生产和安全造成许多难题。该矿80％的产量出自这些倾斜煤层。过去一般是用木支柱爆破采煤,以伪倾斜推进全部充填来开采这些倾斜煤层。但用这些方法不能指望在安全和生产效率上有巨大进展。 I. INTRODUCTION The geological structure of Chiping coal mine is very complex and is one of Japan’s steeply pitched mines. Since its exploitation, the steeply-inclined coal seams that it has created have caused many problems in production and safety. Eighty percent of the mine’s production is from these inclined coal seams. In the past, coal mining was usually carried out by wood pillars, and all these inclines were plowed obliquely to mine these inclined coal seams. But these methods can not count on tremendous progress in safety and productivity.