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位于波兰西南部的下西里西亚煤田,与饱含瓦斯的火成岩地层相邻接。在该煤田的现有四个矿井中,自本世纪初以来共发生了1500次以上的突出,而其中最危险的诺瓦鲁达一个矿就占了1295次。大部份突出是二氧化碳与煤突出,突出煤量为50～5000吨(平均200吨),涌出的瓦斯量为200～800000米~3。突出强度随开采深度的增加而增大,在现有的采掘水平(375～753米)其关系可表示为: M=4.25(H-400)式中:M—突出强度(吨) H—采掘深度(米)
The Lower Silesian coalfield, located in the southwestern part of Poland, adjoins the igneous igneous formation. Of the four existing mines in the field, more than 1,500 emergencies have occurred since the beginning of the century, with 1295 of the most dangerous of which are in Novalud. Most prominence is the outstanding of carbon dioxide and coal, highlighting the coal is 50 to 5000 tons (average 200 tons), the amount of gas emission is 200 ~ 800000 m ~ 3. The intensity of protrusion increases with the increase of mining depth. The relationship can be expressed as M = 4.25 (H-400) at the existing excavation level (375 ~ 753m), where: M- Depth (m)