Gob-side entry driving method
A goaf and extension direction technology, which is used in earth-moving drilling, discharging machinery, surface mining, etc., can solve problems such as harming the working environment of the working face and the inability of blasting and roof cutting technology to meet the requirements of safe operation, and achieves a reduction in The effect of maintaining difficulty and reducing control difficulty
Pending Publication Date: 2021-08-17
CCTEG COAL MINING RES INST
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Problems solved by technology
[0004] However, the blasting roof cutting technology has gradually exposed many disadvantages, such as the harmful gas generated by blasting that endangers the working environment of the mining face, and the blasting operation may cause other secondary disasters. Requirements
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[0028] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0029] Combine below Figure 1-Figure 5 Describe the gob-side entry method provided by each embodiment of the present invention, the gob-side entry method provided by this embodiment, comprising steps:
[0030] Drilling forms a liquid injection hole 6, and the bottom end of the liquid injection hole 6 is located in the overburden layer 3 above the layer to be mined;
[0031] Inject high-pre...
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The invention provides a gob-side entry driving method. The gob-side entry driving method comprises the steps that drilling is conducted to form a liquid injection hole, and the bottom end of the liquid injection hole is located in an overburden stratum above a to-be-mined layer; high-pressure liquid is injected into the liquid injection hole and can cut off the overburden stratum; and mining operation is conducted on the to-be-mined layer, a goaf of an upper section working face and a goaf of a lower section working face are formed, the goaf of the upper section working face and the goaf of the lower section working face are separated through a narrow coal pillar, and the goaf of the upper section working face is located below the fracture position of the overburden stratum. According to the gob-side entry driving method, the problems of operation environment harm and secondary disaster occurrence can be avoided.
Description
technical field [0001] The invention relates to the technical field of mining, in particular to a goaf-along driving method. Background technique [0002] Narrow coal pillar gob-side entry technology is an efficient, green and safe method of mining coal resources. The advanced mining stress caused by the mining of the working face is superimposed on the lateral support pressure formed after the mining of the upper section of the working face, resulting in a dynamic mining stress with a higher degree of stress concentration. The range is prone to strong large deformation and damage disasters. [0003] At present, in order to control the large deformation of the surrounding rock of the narrow coal pillar along the goaf roadway, technical means such as roof cutting and small-scale partial pressure relief are mainly used. At present, blasting technology is mainly used for roof cutting and pressure relief. [0004] However, the blasting roof cutting technology has gradually exp...
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IPC IPC(8): E21C41/18E21B7/04E21C37/12
CPCE21C41/18E21B7/04E21C37/12
Inventor 张剑刘爱卿李中伟李建波王港盛
Owner CCTEG COAL MINING RES INST