Testing method of hole reinforcing material for grout injection hole of breaking roof of coal mine

A technology for broken roof and material testing, which is applied in the field of coal mines, can solve problems such as performance testing of grouting hole solid hole materials for broken roofs in coal mines, and achieve the effects of improving progress, saving costs and simple methods.

Inactive Publication Date: 2014-04-16
HENAN POLYTECHNIC UNIV
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Problems solved by technology

[0004] In view of the above situation, in order to solve the defects of the prior art, the object of the present invention is to provide a method for testing the material of the grouting holes in the broken roof of coal mines, which can effectively solve the problem of the performance testing of the materials of the grouting holes in the broken roofs of coal mines.

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  • Testing method of hole reinforcing material for grout injection hole of breaking roof of coal mine
  • Testing method of hole reinforcing material for grout injection hole of breaking roof of coal mine
  • Testing method of hole reinforcing material for grout injection hole of breaking roof of coal mine

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Embodiment Construction

[0013] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0014] Depend on Figure 1-6 Given, the pore-fixing material of the present invention is a mud liquid, and the test piece manufacturing device is utilized to carry out according to the following steps:

[0015] The first step is to fill the broken coal and rock blocks, connect the test piece production pipe 3 with the grouting cap 2, and the grouting cap 2 is stuck in the slot 11 of the support 1, and fill the broken coal from the orifice of the test piece production pipe 3 Rock block, utilize push rod 4 to compact it while filling the broken coal rock block, until the orifice, seal the test piece making pipe 3 orifice with sealing material; Coal and rock blocks are smashed in the laboratory, and the size of the block is between 3 and 5mm, which is used to simulate the degree of fragmentation of the hole wall during dri...

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Abstract

The invention relates to a testing method of a hole reinforcing material for a grout injection hole in a breaking roof of a coal mine. By adoption of the testing method, the performance testing of the hole reinforcing material for the grout injection hole in the breaking roof of coal mine can be effectively realized. The testing method adopting the technical scheme comprises the following steps: (1) filling broken coal-rock blocks; (2) connecting with a manual grout-injection pump; (3) injecting grout; and (4) pushing out, testing and recording a test piece. The testing method has the advantages that the simple and reasonable effects are achieved, the difficulty in laboratory testing on the performance of the hole reinforcing material of the grout injection hole in the breaking roof of the coal mine is effectively solved, the progress of research and development of the hole reinforcing material is greatly improved, and the cost is reduced, so that the testing method is an innovation on the testing method for the performance of the hole reinforcing material of the grouting hole in the breaking roof of the coal mine.

Description

technical field [0001] The invention relates to the field of coal mines, in particular to a method for testing materials for grouting holes in broken roofs of coal mines. Background technique [0002] Tunneling and mining are two key links in coal mining. Safe, economical and efficient mining is the prerequisite for achieving high production and high efficiency in coal mines, and is the decisive factor for the maximum economic benefits of mines. The recovery of coal mining face generally adopts single support or hydraulic support to provide a safe and reliable recovery space. However, when the working face encounters a broken roof or passes through a fault zone during the mining process, a large area of ​​roof collapse often occurs, which hinders the normal recovery of the working face. posed great difficulties. At present, the method of filling the caving area with temporary grouting is generally adopted, and the method of pre-grouting in advance is generally used for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04
Inventor 张辉刘少伟徐佑林常建超郑伟师小勇樊克松
Owner HENAN POLYTECHNIC UNIV
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