Above all indexes action, testing ways, influence membership degree and determined weight laws are researched, and put forward a new law for judging the atypical dynamic phenomena in coal mine.
The accumulation and summary of coal mining geologic information arc the best testing and a promotion to the coal geologic prospecting work.
煤矿开采资料的积累和总结是对煤田地质勘探工作的最好检验和促进。
3
According to the realistic application of cement mixing pile in treating soft soil ground of powder coal ash, experiments constructions and testing have proved its practicability.