The fully mechanized caving coal mining under the railway in mine area will result in difficult maintenance of railway because of great deformation and subsidence speed of terrene and railway.
在矿区铁路下进行放顶煤开采所引起的地表及铁路的变形量大，变形速度快，从而导致矿区铁路维护困难。
Most of the railways of coal mining area lie in the countryside and mountain area. The accidents of out-railway are plentiful.
煤炭企业铁路多处于乡村以及山区丘陵地带，路外事故多发。
Most of the railways of coal mining area lie in the countryside and mountain area. The accidents of out-railway are plentiful.
煤炭企业铁路多处于乡村以及山区丘陵地带，路外事故多发。
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