Pillarless phased caving method with top tailing crushed stone filling and sectional water injection binding

Abstract

The invention relates to a pillarless phased caving method with top tailing crushed stone filling and sectional water injection binding, comprising the following steps of: dividing an ore body into phases, arranging stoping gateways in the phases by means of rhombic staggering, dividing the phases into sections, and carrying out rock drilling, blasting and ore removal in a stoping tunnel. The pillarless phased caving method with the top tailing crushed stone filling and the sectional water injection binding is characterized in that ore drawing is controlled by means of water injection during a stoping process, a top gob formed during the stoping process is processed by means of the top tailing crushed stone filling, the ore drawing is controlled by means of the water injection during the stoping process, and water is injected and uniformly permeated into rocks covered around an ore drawing hole and the end wall of the stoping tunnel, and then is stood for 1-3 days. The pillarless phased caving method with the top tailing crushed stone filling and the sectional water injection binding has the following advantages: the problems of high loss and dilution and surface subsidence of the caving method are solved, and loss and dilution indexes are lower than those of an open-stope method and a filling method; the pillarless phased caving method is simple in structure, great in production capacity and high in production efficiency; and due to the filling of a tailing crushed stone in the top, a role of utilizing industrial wastes can be plaayed, and benefits to environmental protection can be realzied.

Description

Technical field [0001] The invention belongs to the technical field of underground mining methods, and in particular relates to a pillarless stage caving method with top tailings and gravel filling and segmented water injection bonding. Background technique [0002] Underground mining methods include three basic procedures: accurate mining, cutting, and stoping. According to the way of ground pressure maintenance, they are divided into three categories: empty field mining, filling method and caving mining method. [0003] In the process of stoping, the empty mining method divides the ore blocks into ore houses and pillars. The stope mainly relies on temporary or permanent pillars for natural support, sometimes supplemented by artificial pillars. Mining pillars and timely disposal of the mined areas are suitable for mining deposits where ore and surrounding rock are both stable. The mined areas are allowed to have a larger exposed area within a certain period of time. [0004] The ba...

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Problems solved by technology

[0016] According to the knowledge of powder engineering, when the powder and gravel meet water, the cohesiveness will easily become larger, affecting its fluidity

[0017] However, for some new mines, or due to the different properties of the overburden rock, the overburden rock is not easy to be eroded or broken, and the content of gravel and powder in the overburden rock is relatively small. It is difficult to bond the overburden rock with water or glue, and the flow of overburden rock It is difficult to change the properties, and it is necessary to artificially increase the content of powder and gravel

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