Sill pillar staged caving stoping method with single route projecting eaves structure
A technology of stage caving and mining method, applied in surface mining, underground mining, special mining and other directions, can solve the problem of lack of research on waste rock hopper control, and achieve the goal of improving ore recovery rate, reducing ore dilution, and solving loss and dilution. Effect
Active Publication Date: 2013-03-20
ANSTEEL GRP MINING CO LTD
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[0028] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.
[0029] Such as figure 1 , figure 2 , image 3 As shown in Fig. 1, a stage caving mining method with a bottom pillar with a single-entry overhanging structure includes dividing the ore body into stages when mining a medium-thick ore body, and dividing the ore body into sections in the stages. The rock-drilling roadway 11 and the bottom structure of the single-entry road are arranged along the outer veins of the lower plate, and the ore is extracted by electric rake. Retreating mining, in the rock-drilling roadway 11 and the mine-receiving roadway 1, the method of pre-concentrated rock drilling is used to arrange the upward fan-shaped middle-deep holes, that is, the upward fan-shaped middle-deep holes 8 in the mine-receiving roadway and the upward fan-shaped blast holes in the rock-drilling roadway Hole 9, simultaneously blasting...
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The invention belongs to a sill pillar staged caving stoping method with a single drift creasing structure. In the method, when medium thick ores are exploited, the ores are divided into stages, and the stages are divided into sections; and a drilling drift and a bottom structure of a single drift are distributed on a low wall vein of the sections along the vein, and ores are removed by a scraper. The method is characterized in that: stoping of the creasing structure of an end is finished by using the stage as a unit, and the stoping height is equal to the total height of stages; and at the sections in the stages, ores are sequentially blasted for an ore caving space from top to bottom, and ores are sequentially removed by a scraper tunnel from top to bottom at all sections until stoping drifts at the sections is stoped. The method has the advantages that: caved ores are separated from rock covering the caved ores, and during ore drawing, a barren rock funnel can be effectively avoided, so that the loss and dilution of ores are reduced, the method is simple, low in cost, safe and reliable and easy and practicable, and production capacity is large. The method is suitable for underground mining of medium thick ores.
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 a bottom column and a single-entry overhanging eaves 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. The caving method is divided into the caving method with pillars and the caving method without pillars according to the mining method with or without bottom structure. The pillar caving method includes the pillar caving method and the pillar caving method. Both the pillar caving method and the pillar caving method are high-intensity mining methods and have been widely u...
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IPC IPC(8): E21C41/16F42D3/00
Inventor 邵安林
Owner ANSTEEL GRP MINING CO LTD