Blast hole construction method and structure at joint of chambers and pillars
A construction method and joint technology, applied in ground mining, mining equipment, earthwork drilling and mining, etc., can solve the problems of easy plugging of holes, broken hole walls, large deflection rate of drilling blastholes, etc.
Pending Publication Date: 2022-05-27
JCHX MINING MANAGEMENT
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Problems solved by technology
[0004] The existing technology has the following disadvantages: 1. One side of the joint of the mine pillar is the filling body, and the other side is the original rock of the ore body. The deflection rate of the drilling blast hole is large, and the hole wall is broken, which is very easy to block the hole; 2. The mine house The joint surface of the ore pillar is not regular, and the layout of blastholes cannot avoid drilling to the filling body or missing a part of the ore body
Method used
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Embodiment Construction
[0036] The principles and features of the present invention are described below, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0037] like Figure 1-Figure 3 Shown, the present embodiment a kind of blasthole construction method of mine pillar junction, comprises the following steps:
[0038] Step 1: mine pillar mining;
[0039] Step 2: install prefabricated blast holes 3 on the joint surface of the pillar goaf 6 and the mine house 8;
[0040] Step 3: filling the pillar mined-out area 6 with the filling body;
[0041] Step 4: Charge explosives into the prefabricated blast hole 3 and implement blasting.
[0042] The blasthole construction method uses prefabricated prefabricated blastholes 3 to achieve precise control of the boundaries of the ore body. The construction difficulty of the blast holes at the joint of mine pillars is significantly reduced, the construction accuracy is sig...
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Abstract
The invention relates to the field of blasting stoping, in particular to a blast hole construction method and structure at the joint of a chamber and an ore pillar, and the construction method comprises the following steps that ore pillar stoping is conducted; prefabricated blast holes are formed in the combination surface of the pillar goaf and the chamber; filling the pillar goaf with a filling body; and charging the prefabricated blast holes with explosives, and performing blasting. The blast hole installation structure comprises a prefabricated blast hole, the upper end and the lower end of the prefabricated blast hole are connected with a top plate and a bottom plate of the roadway respectively, the prefabricated blast hole is tightly close to the combination face of the jamb goaf and the chamber, the jamb goaf is filled with a filling body, and the prefabricated blast hole is filled with explosives. The blast hole construction method has the beneficial effects that the prefabricated blast holes formed in a prefabricated mode are used, and accurate control over the boundary of the ore body is achieved. The construction difficulty of the blast holes at the joints of the chambers and the pillars is obviously reduced, the construction precision is obviously improved, the dilution rate is reduced by more than 30%, and the loss rate is reduced by more than 50%.
Description
technical field [0001] The invention relates to the blasting mining field of mines which are mined by stage empty stop and then filling mining method, especially the stope mining in metallurgical and non-ferrous mines with high ore value and relatively broken ore bodies. The invention specifically relates to a blast hole construction method and structure at the junction of mine pillars and mine houses. Background technique [0002] In the mines that are mined by the open-field and then-fill mining method in the use stage, the mining is mainly divided into two steps. The mining sequence is as follows: firstly, the ore pillar is returned and the ore pillar is cemented and filled, and then the mining of the mine room is carried out. Due to the irregular junction surface of mine pillars and broken rocks, the ore recovery efficiency at the junction of mine pillars is seriously affected, and the ore loss and dilution rate have remained high. [0003] In order to solve this proble...
Claims
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Login to View More IPC IPC(8): E21C41/22E21F15/00
CPCE21C41/22E21F15/00
Inventor 严成涛周根明郑遵敬孙占群龙峰吕晓龙
Owner JCHX MINING MANAGEMENT