Fill mining method using concrete components to assemble bottom columns

Abstract

The invention relates to a filling mining method for assembling a bottom column by using concrete members. The filling mining method is characterized by comprising the following steps that (1) ore block arrangement is performed, specifically, the length of a ore block is 60m, the width of the ore block is the thickness of an ore body, and man way shafts and ore chutes are arranged at intervals of60m along a vein crossing roadway; (2) mining-cutting is performed, specifically, comprehensive undercutting is performed perpendicular to the trend of the ore body in a footwall vein of the ore body,the height of undercutting is 5m, and the bottom column is assembled with the concrete members in the space of undercutting at the bottom of the ore block; (3) stoping and ventilation are performed,specifically, a rock-drilling roadway is tunneled in the trend of the ore body on the upper portion of the ore body, connecting roadways are dug to both sides every 5m in the rock-drilling roadway, vertical deep holes are drilled downwards with a rock-drilling trolley to carry out subsection millisecond blasting, and ore is stoped backwards in the trend of the ore body; and (4) filling operation is performed, specifically, stope filling is carried out after the ore extraction is completed, and all tailings cemented filling is adopted with the concentration of filling slurry controlled at 60%-70%. The filling mining method for assembling the bottom column by using the concrete members is convenient to construct and simple in mining-cutting process, reduces ore loss, improves degree of extraction and has high safety.

Description

technical field [0001] The invention relates to a filling mining method using concrete components to assemble bottom columns, and relates to the field of underground mining of metal mines. Background technique [0002] In recent years, with the application of scientific and technological progress in mining engineering, and with the joint efforts of my country's mining enterprises and scientific research and design units, the development of filling mining technology has become increasingly mature. At present, the filling mining method is widely used in metal mines due to its low dilution rate, high recovery rate, resource saving, and safe operation. In addition, the filling mining method also plays an important role in controlling ground pressure and preventing rockbursts. It plays a huge role, so filling mining technology will surely become the mainstream development trend in the field of mining resource mining. [0003] Today, there are three main types of floor structures...

AI Technical Summary

Problems solved by technology

However, generally speaking, the operation process of the base column is complex and changeable, the cutting volume is large, the cutting ratio of 1,000 tons is high, the efficiency is low, the maintenance volume is large and difficult to maintain, resulting in high mining costs

The preparation speed of the bottom pillar roadway is slow, the preparation period is long, and the workload is large, accounting for about 30% of the total labor of the mining block. In addition, workers spend a lot of time on leak prevention, resulting in long mining time and increased labor intensity. Seriously restricts mining efficiency

In addition, due to the complex and diverse shapes of the bottom pillars, and the blasting construction, the original rock stress and overall stability of the ore are destroyed, so that the overall viscosity of the ore itself is reduced, and it is easy to cause the risk of falling

In the actual production process, the quality of the excavated funnel will be poor, which not only reduces the mining capacity, but also reduces the quality of secondary crushing of the ore, worsens the working conditions, and even endangers the safety of miners.

[0004] In the current underground mining process, bottom pillar ore is used as a secondary mining resource. Because of its complex geological conditions, especially affected by the surrounding geological environment, the mining conditions are relatively limited, there are many uncertain factors, and the upper and lower mining The mining in advance destroys the integrity of the pillar ore body, makes the pillar more likely to collapse and damage, and brings great difficulties to the mining of the pillar

Therefore, the bottom pillar is generally regarded as a permanent loss without recovery, which greatly reduces the recovery rate and does not conform to the design concept of economical mining.

In recent years, many mines have used trenches instead of funnels, and the mode of transporting ore with trackless equipment has greatly improved the recovery efficiency, but still has not solved the problems of low recovery rate of bottom pillar ore and poor safety.

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