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为程潮铁矿无底柱分段崩落法回采进路维护提供科学依据,武钢程潮铁矿、东北大学、武钢矿山所共同商定,以该矿-220水平10穿以东全部巷道(近7,000m)为研究对象,进行矿岩稳定性分级、回采爆破震动影响及支护形式选择与优化等研究。经三年(1989年3月-1992年6月)的现场测试与分析,于今年3月20日通过冶金部鉴定。得到以下成果: (1)在试验区内设置169个测点,获取大量数据的基础上,首次采用“工程岩体分级”国家标准的建议方法,从定性和定量两方面给出了矿岩分级结果,该水平中:Ⅰ级占1.13％,Ⅱ级占11.88％,
It provides a scientific basis for the maintenance of the reclamation approach of the subsoil caving method of Chengchao Iron Mine. Wusteel Chengchao Iron Mine, Northeastern University and Wugang Mining Institute jointly agreed to take the mine -220 level 10 to wear all the east lanes (nearly 7,000m) Object, classification of ore rock stability, impact of blasting vibration and support selection and optimization research. After three years (March 1989 - June 1992) on-site testing and analysis, on March 20 this year by the Ministry of metallurgical appraisal. The results are as follows: (1) Based on the 169 measuring points set in the experimental area and obtaining a large amount of data, the proposed method of national standard of “engineering rock mass grading” is adopted for the first time and the grading of ore rock is given qualitatively and quantitatively As a result, among the levels, Grade I accounted for 1.13%, Grade II accounted for 11.88%