Descending open stope subsequent filling mining method

Abstract

The invention discloses a descending open stope subsequent filling mining method. The method comprises the following steps of dividing a body to be mined into stopes, and stoping by adopting a medium-length hole or deep hole rock drilling blasting mode; vertically arranging adjacent stopes in a staggered manner in the horizontal direction; and stoping any stope after stoping of the vertically adjacent upper stope and the horizontally adjacent upper stope and filling maintenance. The method is suitable for mining of hard inclined to steep medium-thick ore bodies or horizontal to gently inclinedthick and large ore bodies under the condition that the rock mass of underground metal / nonmetal mines is generally extremely poor or the deep high stress condition, and has the characteristics of high stope production capacity, high stoping efficiency, high mechanical operation degree and the like.

Description

technical field [0001] The invention relates to a filling mining method, in particular to a descending empty field and subsequent filling mining method. Background technique [0002] Underground metal / nonmetal mining usually excavates a certain volume of ore rock in the planned and designed stope, requiring the ore rock around the excavation space of the stope to be stable for a certain period of time. Generally speaking, the larger the size (stope height, span, etc.) that can be kept stable after the ore excavation is exposed, the better it is generally possible to use large-scale mechanized mining equipment to complete high-efficiency mining, which can significantly improve the comprehensiveness of the stope. production capacity. However, the self-stabilizing size of the stope excavation space mainly depends on the rock mass quality of the ore body to be mined. Therefore, when planning and designing the mining process of underground metal / non-metal mines, it should be ba...

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Problems solved by technology

[0014] ① Regardless of the hexagonal or rectangular access section, the section of the downward approach stope is subject to size restrictions (the access width and height are generally 3 to 5 meters), and the production capacity of each recovery access unit is generally lower

[0015] ② There are many mining processes. In the mining operations such as rock drilling, ore extraction, and reinforcement laying in the access roadway, the ability to use large-scale mechanized equipment is limited, and the connection and management of various mining operations is complicated. 40-60 meters) ore mining, its overall mining efficiency is relatively low

[0017] ① Although the mining height of each approach stope is not large (generally 3 to 5 meters), each downward approach stope in each layer needs to manually lay steel mesh on site after the mine is completed, and Each layer must use high-strength filling body to fill the false roof to meet the safety and stability of the roof of the artificial filling body during the mining of the lower layer, resulting in the completion of typical stage height (generally 40 to 60 meters) of rock mining When , the cost of materials used for steel mesh construction and false roof high-strength filling is relatively high

[0018] ② The mining process of the access stope is complex, and it is difficult to apply large-scale mechanized equipment. In order to improve the comprehensive production capacity, mines usually arrange multiple mining working faces at the same time, and the number of mining personnel working simultaneously underground leads to high labor costs. The cost of safe operation management is high

[0030] Artificially constructed protective structures are usually required for rocks with poor rigid support quality. This mode can play a role of safety protection of rigid supports in shallow mining or rock mining under relatively low-stress conditions, but for deep high-stress environments The artificial protection structure may be difficult to rigidly support the closure of high-stress ore rocks, which will affect the safety and reliability of the pre-constructed mining operation environment.

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