Mining method for transitioning underground ore bodies from open stope mining method to caving mining method

A caving mining and mining method technology, which is applied in the field of transition of underground mines from open-field mining to caving mining, can solve the problems of complex construction organization, high loss rate of ore recovery and poor operation safety, etc. The overall economic benefit of the deposit and the effect of extending the service life of the mine

Active Publication Date: 2015-03-11
NORTHWEST RES INST OF MINING & METALLURGY INST
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Problems solved by technology

[0006] In order to overcome the problem of mining connection during the transition from the open-stop mining method to the caving mining method, the present invention provides a connection method for realizing the transition from the open-stop mining method to

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  • Mining method for transitioning underground ore bodies from open stope mining method to caving mining method
  • Mining method for transitioning underground ore bodies from open stope mining method to caving mining method
  • Mining method for transitioning underground ore bodies from open stope mining method to caving mining method

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Embodiment Construction

[0029] Taking an underground mine as an example, the mine was mined by the open-field method of segmental rock drilling in the early stage, and later changed to the segmental caving method without pillars due to changes in ore body conditions.

[0030] Specific steps are as follows:

[0031] Step 1: Division of Regions

[0032] 1) Determination of critical exposure area

[0033] The open field method in the segmented rock drilling stage is suitable for ore and surrounding rocks without large fault fracture zones, inclined and steeply inclined medium-thick ore bodies with firmness factor f≥6, tensile strength > 10MPa, and compressive strength > 50MPa. Pillarless segmented caving method is suitable for inclined and steeply inclined thick ore bodies with ore and surrounding rock firmness coefficient 6>f≥2, tensile strength>3MPa, compressive strength>15MPa. Therefore, it is necessary to change the open-field mining method to the caving mining method when encountering an ore ...

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Abstract

The invention provides a mining method for transitioning underground ore bodies from an open stope mining method to a caving mining method, and aims at solving the problems of low working safety, large ore recycling lean loss rate, complicated construction organization and the like in a transitioning period of the two mining methods in the prior art. The mining method comprises the steps: 1, dividing regions, determining a critical exposure area, determining a stopping region and determining a region stopping sequence; 2, recycling interparietal columns; 3, generating waste stone coverage layers; 4, recycling ore pillars in adjacent regions; 5, drawing ores; 6, recycling a bottom structure. The mining method has the benefits that the potential safety and the problems of ore recycling lean loss rate and the like in a mutual transitioning process of the two mining methods are solved, and conditions are created for comprehensively using ore resources, prolonging the service life of a mine and enhancing the total economic benefit of an ore deposit.

Description

technical field [0001] The invention belongs to the technical field of mine mining, and is designed to mine underground mines, in particular to a cohesive method for realizing the transition of underground mines from an open field mining method to a caving mining method. Background technique [0002] For medium-thick ore bodies with steep inclination, no agglomeration, and no spontaneous combustion, the upper part adopts vertical ore body strike layout and adopts the open-field method of segmented rock drilling stages to mine the ore body. Due to the change of ore body occurrence state, or the rock The joint spacing and joint conditions have undergone sudden changes, and the original mining method is no longer suitable for safe and efficient mining of the ore body. [0003] The characteristics of the open field method in the segmented rock drilling stage are: this mining method is suitable for medium-thick ore bodies with ore and surrounding rocks that are more than moderate...

Claims

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Application Information

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IPC IPC(8): E21C41/22
CPCE21C41/22
Inventor 孙嘉陈小平王成财郭生茂郝显福刘武团高庆伟焦满岱张海磊王忠泉高忠
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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