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十多年以来,国内不少矿山先后开展了无底柱分段崩落法的试验研究和推广应用,取得了可贵的成绩和经验。生产实践表明,此法的优点甚多,实属一种高效采矿法,但目前还存在以下难题: (1)在国内采用无底柱分段崩落法的矿山中,多数至今仍未达到设计生产能力; (2)采场内通风条件较差,不适应强化开采的要求; (3)采场放矿过程中,矿石损失率较大,矿石贫化率较高。 上述问题的产生除与特定的矿床开采条件有关外,笔者认为,重要原因还在于采矿方法的分段巷道结构所致。譬如,由于作为
For more than a decade, many domestic mines have carried out pilot research, popularization and application of subsea caving method and have made valuable achievements and experiences. Production practice shows that this method has many advantages and is indeed an efficient mining method. However, the following problems still exist: (1) Most of the mines adopting pillarless caving method in China have not yet reached the designed production Capacity; (2) Ventilation conditions in the stope are poor and do not meet the requirements of intensified mining; (3) During the ore leaching process, the ore loss rate is relatively large and the rate of ore depletion is high. In addition to the emergence of the above problems with the specific mining conditions, the author believes that the important reason is that the mining method of sub-roadway structure. For example, as a result of