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A stage caving mining method with overhanging eaves and bottomless pillars with artificial false roof of steel-concrete structure

A technology of artificial false roof and stage caving, which is applied in ground mining, underground mining, special mining, etc. It can solve the problems of complex construction, high material consumption, and lack of research on the control of waste rock funnels, so as to achieve a small laying range and reduce ore poverty. The effect of reducing and solving the problem of loss impoverishment

Active Publication Date: 2011-11-30
ANSTEEL GRP MINING CO LTD
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The artificial false roof used in the current caving method is a method of fully laying a false roof between the covering rock layer and the ore to isolate the covering layer from the caving ore. The construction is complicated and the material consumption is too large.
[0011] The waste rock funnel formed in the ore drawing process is the most direct cause of the ore loss rate and dilution rate, but there is a lack of research on the control of the waste rock funnel at home and abroad

Method used

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  • A stage caving mining method with overhanging eaves and bottomless pillars with artificial false roof of steel-concrete structure
  • A stage caving mining method with overhanging eaves and bottomless pillars with artificial false roof of steel-concrete structure
  • A stage caving mining method with overhanging eaves and bottomless pillars with artificial false roof of steel-concrete structure

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Embodiment Construction

[0046] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0047] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown in Fig. 1, a stage caving mining method with steel-concrete structure and artificial false roof, which includes dividing the ore body into stages, and then dividing the stages into sections. Arrangement, in the mining roadway 1, adopt the pre-concentrated rock drilling method to arrange the upward fan-shaped medium-deep holes 7, and carry out retreating mining under the overburden rock layer 2. Start from one end, cut first, and then continue mining. At the same time, the upper covering rock formation 2 is filled with new gobs. When the end of each segment in the stage reaches the same vertical position, the end walls of each segment in the stage are in a vertical state as a whole 4, as figure 2 As shown, then, the topmos...

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Abstract

The invention relates to a creasing-type sill-pillar-free stage caving stopping method based on a steel structured artificial top. The method comprises the following steps of: dividing an ore body into stages; dividing each stage into sublevels; distributing an upper sublevel stopping tunnel and a lower sublevel stopping tunnel in a rhombic staggered manner; drilling rock, blasting and removing ore from the stopping tunnels; and distributing upward fan-shaped middle-deep holes in the stopping tunnels in a pre-concentrated rock drilling manner to perform back-type stopping under a covered rocklayer, wherein the method is characterized in that: a stage is used as a unit; and an end creasing-type structure is finished in each sublevel of each stage, and the steel structured artificial tops which have the same width as the stopping tunnels are continuously paved on waste stone funnel control points of two rockbottom sublevel stopping access roads of each stage except the rockbottom stage. The sill-pillar-free stage caving stopping method has the advantages that: caved ores can be separated from covered rocks; and during ore discharging, a waste stone funnel can be prevented effectively, so ore loss and depletion can be reduced.

Description

technical field [0001] The invention belongs to the technical field of underground mining methods, and in particular relates to a stage caving mining method with an overhanging eaves type without a bottom column and an artificial false roof with a steel-concrete structure. Background technique [0002] Underground mining methods include three basic processes of mining, cutting and back mining. According to the ground pressure maintenance method, they are divided into three categories: open-field mining method, filling method and caving mining method. The method of filling the goaf to control and manage the ground pressure has been widely used in the world. Among the caving methods, the segmented caving method and the staged caving method have high mining intensity and high degree of mechanization, and are most widely used in large and medium-sized underground mines. The segmental caving method is to divide the ore body into several stages, and then divide the stages into sev...

Claims

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Application Information

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IPC IPC(8): E21C41/16F42D3/00
Inventor 邵安林
Owner ANSTEEL GRP MINING CO LTD
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