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一、问题的提出如所周知,在下述条件采用压入式通风是有利的:1.开采近地表水平走向长度大的矿田,采用区对角或组对角通风时;2.由于地形或其他原因不能建立总回风水平,或由于矿体分散不利于建立总回风水平,而采用区对角或组对角通风时;
I. PROBLEM PROTOCOL It is well-known that the use of press-in ventilation is advantageous under the following conditions: 1. mining of ore fields with long horizontal surface near the surface using diagonal or diagonal ventilation; 2. due to the topography or For other reasons, the total return air level can not be established or diagonal or diagonal ventilation may be used due to the orebody dispersion is not conducive to the establishment of a total return air level;