浅埋煤层覆岩隔水性与保水开采分类

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Abstract According to simulation model tests and water conservation of overburden rock in shallow-buried coal seam，it is revealed that the cracks of overburden rock induced by mining are mainly composed of upward cracks and downward cracks；the impermeability of overburden impermeable layer depends on the interpenetration of mining crack zone. The calculation formula of the developing height of upward crack zone is analyzed；and the developing depth of downward crack zone is also measured by simulation. Based on the relationship among developing degree of mining crack，mining height and impermeable layer，the impermeability criterion is put forward by the ratio of impermeable layer thickness to mining height. The water conservation mining is divided into 3 types，i. e. nature water conservation mining，controllable water conservation mining and special water conservation mining，which provide scientific basis for shallow buried coal seam mining.

Key words： mining engineering shallow buried coal seam overburden rock impermeability water conversation mining

Received: 31 December 2009

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/3622

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