Deep hole grouting technology and method at advanced abutment pressure region for comprehensive mining work surface of coal mine

A fully mechanized mining face and advanced support technology, which is applied to mining equipment, earthwork drilling, bolt installation, etc., can solve problems such as difficult to effectively deal with slabs, improve mechanical properties, avoid coal wall slabs, and improve Effect of permeability and diffusion effect

Active Publication Date: 2016-08-31
HENAN POLYTECHNIC UNIV +1
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem that it is difficult to effectively deal with the side p

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  • Deep hole grouting technology and method at advanced abutment pressure region for comprehensive mining work surface of coal mine
  • Deep hole grouting technology and method at advanced abutment pressure region for comprehensive mining work surface of coal mine
  • Deep hole grouting technology and method at advanced abutment pressure region for comprehensive mining work surface of coal mine

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[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0031] A technology and method for deep hole grouting in the advanced supporting pressure zone of a fully mechanized coal mining face, which steps include four technological processes: pre-hole formation, pipe insertion, hole sealing, and advanced supporting pressure zone grouting;

[0032] (1) Hole formation in advance: advance coal mining face 1≥200m, use hydraulic drilling rig to transport the roadway 2, return air roadway 3 or the surfa...

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Abstract

The invention provides a deep hole grouting technology and method at an advanced abutment pressure region for a comprehensive mining work surface of a coal mine. According to the method disclosed by the invention, early strength deep hole grouting materials are matched with a high-pressure mass-flow grouting pump, and an advanced hole forming technology, a pipe inserting technology, a hole sealing technology and a grouting technology for the advanced abutment pressure region are adopted, so that the problem that high-yield high-efficiency coal mining work surfaces with large mining height, top coal caving and the like can are often subjected to rib spalling can be solved; the method does not influence the production of the work surface, the mechanical properties of coal bodies are essentially improved, the completeness of the coal bodies is re-molded, and the method has a favorable popularization property.

Description

technical field [0001] The invention relates to the field of prevention and control of coal wall slabs in a fully mechanized mining face, in particular to a technique and method for deep hole grouting in an advanced support pressure zone of a fully mechanized mining face. Background technique [0002] At present, the coal industry is developing towards high-yield and efficient large-scale mechanization. Due to the outstanding advantages of high-yield and high-efficiency, the large-scale and high-mining coal mining method has been applied in many mining areas in my country; It can reach more than 10 meters a day and its mining height is relatively large, generally greater than 6m. During the mining process, especially in the final mining stage, the coal wall of the working face is prone to flaking. After flaking, it will seriously affect the production safety of the working face and delay production progress. [0003] The current way to prevent and control the coal wall of the...

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Application Information

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IPC IPC(8): E21D20/02
CPCE21D20/021E21D20/028
Inventor 熊祖强刘旭锋王俊杰王雨利曹建波张耀辉袁印张建锋陈兵李东华洪紫杰
Owner HENAN POLYTECHNIC UNIV
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