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前言我国地大物博,煤炭资源极为丰富,大小煤田星罗棋布于全国各地。在辽阔而广大的含煤地区上方有数量众多的村庄、市镇,还有纵横交叉的铁路和河流。这些房屋建筑物、铁路和河流下压有大量的煤炭。因此,安全而合理地开采铁路、建筑物和水体下的煤炭,解放三下压煤,对我国社会主义建设具有深远的意义,既能充分利用地下矿藏资源,有利于老矿挖潜,又能延长矿井寿命,多、快、好、省地增加煤炭产量,缓和有些矿井生产接替和新井建设的紧张情况。
Preface China’s vast territory, rich in coal resources, the size of the coal fields dotted around the country. There is a large number of villages, towns, and railroads and rivers crossing the vast and vast coal-bearing areas. These houses and buildings, railways and rivers under pressure on a large number of coal. Therefore, the safe and rational mining of coal under the railway, buildings and water bodies and the liberation of the three coal mines liberally have far-reaching significance for the socialist construction in our country. They not only make full use of underground mineral resources but are also conducive to tapping the potential of the old mines and extending them Mine life, more, faster, better, provincial increase coal production, ease the succession of some mine production and new wells construction tensions.