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A mining method for thick and large ore bodies

A technology for thick and large ore bodies and mining methods, applied in surface mining, mining equipment, underground mining, etc., can solve problems such as low work efficiency and potential safety hazards, and achieve the goal of improving work efficiency, preventing fragmentation, and reducing the consumption of three materials. Effect

Active Publication Date: 2018-04-10
HUBEI SHANSHUYA MINING SCI & TECH DEV
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Problems solved by technology

[0004] The present invention aims at the potential safety hazards and low work efficiency in the construction process of the gently inclined medium-thick phosphate ore body in the layered and segmented filling mining process, and for the ore body with a bottom-down height of 5 meters.

Method used

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  • A mining method for thick and large ore bodies
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Embodiment Construction

[0015] In the 401-2 panel area in the northwest of the Shanshuya mining area, the thickness of the ore seam is more than 8m, and the inclination angle of the ore seam is 3-5°. The structure of the roof near this area is poor, and the surface subsidence is not allowed in the later stage, so layered and segmented filling methods are adopted for mining. This technology adopts the step-by-step full-layer bottom-down mining technology to mainly solve the problem of secondary bottom-down in the process of stratification and segmentation, and at the same time improve the construction safety factor and effectively protect the lives and properties of operators. Aiming at the medium-thick phosphate ore body in the 401-2 panel (the average mining height is 8m), Shanshuya Mine researched and applied the box-type filling mining technology in the process of mining the ore in this panel, and along the cutting direction, the mines were separated on both sides of the mine house. The upper and ...

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Abstract

The invention provides a thick ore body mining method. A thick ore body refers to an ore body thicker than 5m. According to a chamber type filling mining technique, upper and lower passages are respectively constructed in the middle and on two sides of a chamber along a cutting direction, roof cutting is performed towards the upper passage along a stoping line, a roof and side wall bolting nets are subjected to shotcrete supporting, and the lower passage are descended towards two sides along the stoping line and filled. The method includes steps of upper roof cutting, lower step descending, hierarchical segmented blasting, deslagging and loading, lower wet filling and upper cementing roof connection. By means of stepped full-layer descending mining, a free face is widened to increase blasting efficiency while material consumption caused by secondary descending is avoided, explosive consumption is reduced by 0.12Kg / t, detonator consumption is reduced by 0.11 detonator per t, and consumption of steel chisels and drills is reduced by 0.02Kg / t.

Description

technical field [0001] The invention provides a thick and large ore body mining method, specifically an underground mining method for phosphate rock. Background technique [0002] Yichang Phosphate Mine is one of the five largest phosphate mine bases in the country. Its resource reserves rank second in the country. It has a mining history of nearly 50 years. In the past, it was mainly mined in Yinjiaping, Taoping River, Yanchi River and Zhangcun in the central and southern regions of the mining area. Ping, Dianziping and other mine sections, the ore seam is the lower phosphorus layer, the thickness is stable and balanced, basically below 4 meters, and the one-time full-layer mining method is adopted. With the gradual consumption of resources in the south, mines in Shanshuya, Yuntaiguan, Jiangjiadun, Sunjiadun, Tiaoshuiheneng, Xingshen and Baokang in the north have been gradually developed. However, the northern ore seam is dominated by the medium-thick ore layer, and the th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/22E21F15/00
CPCE21C41/22E21F15/005
Inventor 瞿定军陈翔郭兴忠易胜强安晓亮石明汉向斌
Owner HUBEI SHANSHUYA MINING SCI & TECH DEV
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