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(一般计划调查) 第28条(1)拱圈背后与围岩之间的空隙,在地形地质不良处所,要事先制定采用砂浆或其它注浆材料的注浆计划。(2)计划时,必须事先调查空隙状态及地形、地质状态。
(General Plan Investigation) Article 28 (1) The gap between the arch ring and the surrounding rock shall be planned in advance for the grouting plan with mortar or other grouting material in the places with poor geological features. (2) Plan, you must first survey the gap status and topography, geological conditions.