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Slitting roof cutting stoping method used for precontrolled roof house pillar method

A pre-control roof and roof cutting technology, which is applied in ground mining, mining equipment, mining equipment, etc., can solve the problems of difficult roof management, high mining loss rate, high ore dilution rate, high mining and cutting engineering volume and high direct cost of mining, etc. problem, to achieve the effect of increasing integrity and self-supporting ability, improving safety and resource recovery rate, and reducing the tendency of agglomeration

Active Publication Date: 2020-07-24
河北大白阳金矿有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is that on the one hand, the inclination angle is relatively slow, and the ore cannot be transported and released by its own gravity; on the other hand, it is not conducive to the application of large trackless equipment.
For the mining of large ore bodies with slow dipping, when the open-stop mining method is used for mining, in addition to the high mining loss rate and ore dilution rate, the management of the roof is also relatively difficult; The engineering volume and direct mining costs are relatively high, and it is difficult to find a balance between mining costs, production efficiency and safety
On the whole, the existing schemes have poor recovery safety, high loss rate, complex recovery process, low recovery efficiency and high recovery cost

Method used

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  • Slitting roof cutting stoping method used for precontrolled roof house pillar method
  • Slitting roof cutting stoping method used for precontrolled roof house pillar method
  • Slitting roof cutting stoping method used for precontrolled roof house pillar method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] A roof support method, specifically comprising the following steps:

[0087] - Drill the anchor hole on the roof with the drilling equipment, the anchor hole diameter is 33mm, the hole length = the anchor length - 0.1m, and clean the inner wall of the hole to meet the requirements;

[0088] - Put the model Z2350 resin anchoring agent package in the anchor hole;

[0089] -Use a rotatable device to place the threaded anchor rod including the outer anchor rod body and the pointed head in the anchor rod hole, forcing the pointed head to pierce the resin anchoring agent package; the resin anchor rod is arranged in a plum blossom shape, and the diameter of the anchor rod is 20mm, Length 2.5m, spacing 1.6m;

[0090] - Rotate the anchor rod body at 300r / min to mix the resin anchoring agent until the resin anchoring agent is solidified on the inner wall of the anchor rod hole and the outer surface of the anchor rod body;

[0091] -Install steel strips and pallets, and hang rei...

Embodiment 2

[0097] The difference with embodiment 1 is: a kind of roof support method, used shotcrete also comprises with respect to cement with relative mass parts: 0.11 part of sodium alizarin sulfonate.

Embodiment 3

[0099] The difference from Example 2 is: a roof support method, the resin anchoring agent is placed in the hole of the anchor rod and glass powder and brassinolide are inserted at the same time, the particle size D50 of the glass powder is 5.6 μm, D90 is 31.4 μm. The addition of glass powder is 1.2wt% of the weight of the resin anchoring agent, and the addition of brassinolide is 0.08wt% of the weight of the resin anchoring agent.

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Abstract

The invention provides a slitting roof cutting stoping method used for a precontrolled roof house pillar method, and belongs to the technical field of mining. In the ore inclination direction, propelling is carried out from one end to the other end of a stope, after roof cutting and roof shoring are finished in the stope, downward medium-deep hole stoping of the lower ore body of the stope can becarried out, roof shoring adopts resin anchor rod, steel strip, sprayed concrete and stand column combined shoring, and the precontrolled roof engineering can be finished; the resilience rate of sprayed concrete is smaller than or equal to 13.4%, the 28d-age tensile strength is larger than or equal to 38.5MPa, in the stoping period, pressure and displacement tracing monitoring is carried out on aprecontrolled roof, according to the stoping method, pressure and displacement tracing monitoring is carried out on the precontrolled roof, in-time precast and safety measure taking can be carried outon appearing safety problems, the stoping method can improve the ore recycling rate, the mining loss rate and the ore dilution rate of a house pillar mining method can be reduced, and the economic benefits and the social benefits of an enterprise can be improved.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a mining method for strip cutting and roof cutting used in the pre-controlled roof pillar method. Background technique [0002] Mineral resources are non-renewable resources, and the realization of safe, efficient and full exploitation of mineral resources has always been the goal pursued by mining engineering and management personnel. In the field of metal mines, gently inclined medium-thick ore bodies with a dip angle of 5-30° and a thickness of 5-20m occupy a considerable proportion. The main components of the medium-thick ore bodies are gold-bearing quartz veins and potassium feldspar quartz veins, which are mostly dense. Blocky, disseminated, and agglomerated, the stability is generally strong, but due to multiple tectonic activities and long-term weathering and erosion after the mineralization, the ore body is loose and broken, which greatly reduces the stability...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/22E21D20/00E21D20/02E21D21/00E21D11/10E21F17/18C04B28/04
CPCC04B28/04C04B2201/50E21C41/22E21D11/105E21D20/003E21D20/025E21D21/0006E21F17/18C04B14/06C04B18/141C04B16/0633C04B24/2623C04B24/08C04B2103/12
Inventor 高风刚王征陈海文
Owner 河北大白阳金矿有限公司
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