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冶金部和一机部于1972年12月20日至28日,在河北承德市联合召开了无底柱分段崩落采矿方法经验交流会。有关省、市、自冶区的冶金局和冶金、一机、燃化系统的企业、科研、设计、院校等84个单位,共165名代表参加了会议。会议期间,代表们参观了承钢大庙铁矿采用无底柱分段崩落采矿方法的全部工艺过程,听取了大庙铁矿的经验介绍,交流了南京梅山铁矿、安徽向山硫铁矿等单位的经验;一机系统的代表虚心征求了对矿山设备使用的意见。会议总结了应用这种采矿方法的经验,研究了存在的问题,提出了措施。
Metallurgical Department and a machine department from December 20, 1972 to December 28, held in Chengde, Hebei jointly held a pillarless caving mining experience exchange. A total of 165 delegates attended the meeting from 84 units including metallurgical bureaus of provinces, municipalities and autonomous metallurgical units and enterprises of metallurgy, one-machine and fuel-burning systems, scientific research, design, and institutions. During the meeting, delegates visited the whole process of using the pillarless subsidence mining method at Chenguangdiaomian Iron Mine. After listening to the introduction of Dawang Iron Mine, the delegates exchanged information such as Nanjing Meishan Iron Mine and Anhui Xiangshan Pyrite Mine. Experience; a representative of the system on behalf of an open mind solicited opinions on the use of mining equipment. The meeting summed up the experience of the application of this mining method, studied the problems and proposed measures.