A Mining Method of Inclined-Steeply Inclined Medium-thick Ore Body
A mining method and thick ore body technology, applied in ground mining, earth square drilling, underground mining, etc., can solve the problems of ore drawing loss dilution, limited filling method selection and application, ore value is not high, and achieve efficient recovery and full recovery. The effect of recycling
Active Publication Date: 2021-02-26
NORTHWEST RES INST OF MINING & METALLURGY INST
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Problems solved by technology
For this type of deposit, underground mining is a relatively weak link. The reason for the gently inclined medium-thick ore body is mainly due to the restriction of the dip angle and thickness of the ore body. It is difficult to carry the stope and manage the roof when mining with the open-field method. The problem of ore drawing loss and dilution is more prominent when using the sub-caving mining method. The excavation and cutting volume of mining by the chassis funnel method is very large, and most of the ore value is not high, which limits the selection and application of the filling method. Therefore, in the relevant mines There are many problems in general
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[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0016] Such as figure 1 Shown, a kind of inclined-steeply inclined medium-thick ore body mining method comprises the following steps:
[0017] 1) Divide structural parameters: divide the ore body into ore blocks along the ore body trend, the height of the ore block is 50-80m, and the width of the ore block is 60-100m; the ore block is divided into sections, and the sections are divided into sections. Pillar 2. The ore volume of section mine room 1 accounts for 2 / 3-5 / 6 of the section ore volume, and the ore volume of section ore pillar 2 accounts for 1 / 6-1 / 3 of the section ore volume.
[0018] 2) Mining standard engineering: respectively excavate the rock-drilling ore-out level entry 3 located at the geometric center of the section mine room 1 and the cutting ditch level entry 4 located at the footwall of the sub-section mine room 1, and the r...
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The invention belongs to the technical field of metallic ore deposit underground mining room methods, and discloses a gentle-dipping medium-thick ore body downward layered open stope mining method. The gentle-dipping medium-thick ore body downward layered open stope mining method comprises the steps: an ore body is divided into ore blocks in the trend of the ore body, the ore blocks are divided into sections, and sectioned ore rooms and sectioned ore pillars are divided in the sections; rock drilling ore removal driftways and trench driftways are tunneled correspondingly, a contact driftway is tunneled every 3-5 m in the trend of the ore body to communicate the rock drilling ore removal driftway in the corresponding section and the trench driftway in the former section, and the trench driftways are brushed to form ore removal trenches; and upward sector blast holes are drilled in the ore rooms of the sections in the rock drilling ore removal driftways and the trench driftways of the sections while the ore rooms of the former sections are subjected to ore removal, the upward sector blast holes are blasted, and collapsed ore room ore is shoveled, conveyed and removed. By combining with the advantages of an existing sectioned collapse method, sectioned open stope method, house pillar method, blasting force carrying method and the like, the ore rooms are stoped through the open stope method, the ore pillars are stoped through the collapse method, and the dipping and gentle-dipping medium-thick ore body is efficiently and fully recovered.
Description
technical field [0001] The invention relates to the technical field of underground mining chamber methods for metal ore deposits, in particular to a downward layered open field mining method for gently inclined medium-thick ore bodies. Background technique [0002] According to Zhou Chongren's article "Several Problems in Mining Inclined and Gently Inclined Medium-thick Orebodies": Gently inclined and medium-thick orebodies are a common form of orebody in my country, and this type of orebody accounts for about the total reserves of chemical mines. More than 70% of the total, about 35% in the gypsum deposits of building materials mines, and about 18% in the iron ore deposits of metallurgical mines. For this type of deposit, underground mining is a relatively weak link. The reason for the gently inclined medium-thick ore body is mainly due to the constraints of the dip angle and thickness of the ore body. When mining with the open-field method, it is very difficult to carry the...
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IPC IPC(8): E21C41/22F42D3/04
CPCE21C41/22F42D3/04
Inventor 张海磊
Owner NORTHWEST RES INST OF MINING & METALLURGY INST