Large-stage efficient mining method for steep-dip medium-thick ore body for water-sliming surrounding rock
A mining method and technology of steep inclination, applied in the field of high-efficiency mining of steeply inclined medium-thick ore bodies in large stages, can solve the problems of inability to carry out rock drilling and blasting and ore extraction at the same time, low ore recovery rate, long production line, etc., to achieve production Large capacity, high degree of safety, and safe operation
Active Publication Date: 2020-01-07
UNIV OF SCI & TECH BEIJING +1
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Problems solved by technology
Personnel need to enter the stope several times to carry out the work of lifting the roof and leveling the site, resulting in low operating efficiency and poor safety
Moreover, with the increase of mining depth, the stope has not been filled, resulting in surface subsidence, underground ground pressure appears, and the ore recovery rate is low
The layered filling mining method cannot carry out rock drilling, blasting and ore mining at the same time, and the production line is long, so its production capacity is low and its efficiency is low
Method used
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[0028] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0029] The invention provides a large-stage high-efficiency mining method for steeply inclined medium-thick ore bodies meeting cemented surrounding rocks.
[0030] Such as figure 1 , figure 2 and image 3 As shown, the method includes the following steps:
[0031] (1) Acquisition and cutting:
[0032] (1) Construct artificial false roof 2: For the mining of the uppermost layer of the stope, the width is the horizontal thickness of the ore body. The scraper goes out of the ore, and the ore is unloaded into the chute from the stage transportation lane 9. After the mining is completed, the reinforcement is placed in the stope and the paste 1 is used for high-strength paste filling, and finally the artificial false roof 2 is constructed;
[0033] (2) E...
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Abstract
The invention provides a large-stage efficient mining method for a steep-dip medium-thick ore body for water-sliming surrounding rock, and belongs to the technical field of mining. According to the method, accurate mining and cutting are performed firstly, and then stoping and filling are performed. Specifically, the ore body is divided into a plurality of stopes along the strike direction of theore body, every other stopes of all the stopes are subjected to stoping in sequence, each stope comprises jambs and a stope room, and the length of the stope room is twice the length of the jambs; andthe stoping is carried out by two steps, the first step is stoping of the jambs, and the second step is stoping of the stope rooms. According to the stoping mode, VCR (vertical crater retreat) is adopted for ore breaking, firstly, preliminary roof cutting is performed firstly, a man-made false roof is constructed by high-strength paste filling, a drilling chamber is excavated under the man-made false roof, safety of rock drilling is guaranteed, and an undercutting roadway is excavated during constructing of the false roof. A dry down-the-hole drill is adopted for borehole drilling, the VCR isadopted for ore breaking, and paste filling is performed thereafter. With the adoption of the method, water sliming of the surrounding rock is prevented, the stope safety is guaranteed, and the method has the characteristics of high production capacity, high ore recovery rate and low rate of ore dilution.
Description
technical field [0001] The invention relates to the technical field of mining, in particular to a large-stage high-efficiency mining method for steeply inclined medium-thick ore bodies encountering cemented surrounding rocks. Background technique [0002] my country's complex and difficult-to-mine deposits have a large amount of resources, low mining efficiency, and poor safety. Realizing safe and efficient mining of complex and difficult-to-mine deposits is an important way to improve the guarantee of metal resources in my country. Therefore, it is necessary to find a large-stage high-efficiency mining method suitable for steeply inclined medium-thick ore bodies that encounter cemented surrounding rocks, so as to realize safe, economical and efficient mining of mineral resources. [0003] For the mining method of steeply inclined medium-thick ore bodies that encounter cementation and broken surrounding rocks, the shallow hole ore retention method was mainly used. Personnel...
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Login to View More IPC IPC(8): E21C41/22E21F15/00
CPCE21C41/22E21F15/00
Inventor 吴爱祥杨锡祥王少勇周发陆王贻明魏海涛王勇刘学好夏德威张小刚刘宁
Owner UNIV OF SCI & TECH BEIJING