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阶段深孔台阶崩矿采矿法试验研究,于1990年12月24日至27日在凡口铅锌矿通过了由中国有色金属工业总公司科技局主持的专家技术鉴定。“六五”期间,凡口矿在我国率先试验成功了VCR法并投入生产使用,为矿山达到一期工程设计能力起了很大作用。但VCR法崩矿以下向自由面为主,炮孔与自由面垂直,限制了炮孔的装药范围并要求使用“三高”炸药,每个炮孔均需进行多次分层爆破,施工较繁琐。“七五”期间,矿山进行了提高金属产量的技术改造。为提高矿石产量,北京矿冶研究总院和凡口铅锌矿合作进行了一种新的高强度、高效率大直径深孔采矿法——阶段深孔台阶崩矿采矿法。该法以侧向自由面崩矿为主,炮孔与自由面平行,可使
Stage deep-hole bench collapse mining mining pilot study, December 24, 1990 to 27 in the mouth lead-zinc mine by the China Nonferrous Metals Industry Corporation Technology Bureau presided over the technical appraisal. During the “Sixth Five-Year Plan” period, VK Minerals Co., Ltd., the first trial of VK Minerals in our country, was put into operation and production and played a great role in the mine’s ability to reach the first phase of engineering design. However, the following VCR collapse process to the free surface, the vertical hole and the free surface, limiting the charge of the blast hole and requires the use of “three high” explosives, each blasthole required multiple detonation blasting, construction More complicated. During the “Seventh Five-Year” period, mines conducted technological transformations to increase metal production. In order to increase the ore production, Beijing Mining and Metallurgical Research Institute and Fankou lead-zinc mine jointly conducted a new high-strength and high-efficiency large-diameter deep-hole mining method-stage deep-hole bench collapse mining method. The law to side free-surface collapse of the main hole and free surface parallel to make free