Applying small pillar to protecting roadway is a wide used layout in mining roadway.

小煤柱护巷是工作面上风巷普遍采用的一种布置方式。

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By analysing the hydrology, geology and other conditions of the three mining sections, we optimize the roadway layout of the three districts and decide to adopt the plan of combined roadway layout.

通过对三个采区水文、地质等情况的分析，对三个采区巷道布置方案进行优化，确定了采用联合布置。

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By analysing the hydrology, geology and other conditions of the three mining sections, we optimize the roadway layout of the three districts and decide to adopt the plan of combined roadway layout.

通过对三个采区水文、地质等情况的分析，对三个采区巷道布置方案进行优化，确定了采用联合布置。

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