Sublevel-open-stoping-method pressure-relief stoping method for high-dipping medium-thick ore body
A technology of thick ore body and steep inclination, which is applied in the field of staged open-field method for pressure relief and mining of steeply inclined medium and thick ore bodies, can solve the problem that the layout of transportation roadway cannot meet the engineering needs, increase the amount of mining quasi-engineering and related costs and influences. problems such as the stability of the roadway of the mining system, to achieve the effect of improving the mining efficiency, promoting the secondary adjustment and balance, and improving the blasting efficiency
Inactive Publication Date: 2017-09-19
NORTHWEST RES INST OF MINING & METALLURGY INST
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Problems solved by technology
The traditional mining technology is to arrange the transportation roadway a little far away from the ore body to avoid the supporting pressure. The disadvantage is that the length of the roadway between the transportation roadway and the ore body increases The segmented rock drilling and segmented ore mining method used, each layer has a layered transport roadway and a connecting road, which will inevitably
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[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0036] Such as Figure 1-3 Shown, a kind of sharply inclined medium-thick ore body subsection open-field method pressure relief mining method, the method is carried out according to the following steps:
[0037] Step 1: Arrange the cutting entry 1, the cutting patio 2 and the transportation roadway 4 in the ore body, take the cutting entry 1 as the working space, and drill an upward fan-shaped mid-deep vertical to the axis of the cutting entry 1 in the cutting entry 1 The blast hole, with the cutting patio 2 as the free surface, forms the cutting vertical groove 3 after blasting in stages;
[0038] Step 2: divide the ore body into 3 segments in the vertical direction of the ore body;
[0039] Step 3: In each segment of step 2, divide the ore body into several stopes along the ore body direction;
[0040] Step 4: During the stope recovery p...
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Abstract
The invention belongs to the technical field of mining, and particularly relates to a sublevel-open-stoping-method pressure-relief stoping method for a high-dipping medium-thick ore body. The method achieves pressure-relief type stoping by means of the steps that a cut parvis is formed through blasting in groups, and then the ore body is divided into three subsections in the vertical direction of the ore body; the ore body is divided into a plurality of stopes in each subsection, and each stope is divided into I-VI rows of grouped concentrated blasting subareas to conduct blasting in groups; broken ores are formed after blasting is conducted, a route for transmitting hanging wall stress to heading wall through the ore body is cut off, and pressure-relief grooves in stair shapes are formed in the vertical direction of the ore body. In addition, through multi-group concentrated blasting, a hole-by-hole millisecond blasting detonation technology is adopted, disturbance and damage to rock mass caused by multi-group blasting of traditional operation are reduced, the blasting efficiency is enhanced, the stope room stoping period is shortened, and the ore production efficiency is enhanced.
Description
technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a method for pressure relief and back mining of a steeply inclined medium-thick ore body by segmental open field method. Background technique [0002] In the underground mining of metal mines, the stage transportation roadway is mainly used for ore transportation, while taking into account the requirements of ventilation and drainage, and is usually arranged in the footwall of the ore body. During mining in the lower and middle section, the stage transportation roadway in the upper and middle section is abandoned and no longer assumes the transportation function, and is only used as a temporary air return roadway in the lower and middle section. [0003] When the underground ore body is mined more than 300-400m, within the influence range of the inclined medium-thick ore body mining work, due to the gravity of the collapsed ore rock and the hanging wall pressure of the...
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Login to view more IPC IPC(8): E21C41/22E21C37/00E21F13/02
CPCE21C37/00E21C41/22E21F13/02
Inventor 刘武团高忠刘沈宁陈小平张亭刘财林赵文奇周健强
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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