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Grouting method and system of cracked coal rock mass

A technology for crushing coal and rock mass and grouting system, which is applied in earth-moving drilling, wellbore/well components, sealing/packing, etc., can solve problems such as affecting the normal production of coal mining face and reducing the production efficiency of coal mines.

Inactive Publication Date: 2012-08-15
TIANDI SCI & TECH CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only can not fundamentally solve the safety hazards brought by structural belts such as faults, folds and fracture development zones, but also affect the normal production of coal mining faces and reduce the production efficiency of coal mines

Method used

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  • Grouting method and system of cracked coal rock mass
  • Grouting method and system of cracked coal rock mass
  • Grouting method and system of cracked coal rock mass

Examples

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Embodiment Construction

[0026] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] Such as figure 1 and figure 2 , a kind of broken coal rock mass grouting method of the present invention, grouting is carried out on the broken coal rock mass of the mining down channel in front of the mining face, and its grouting method comprises:

[0028] Step 1, use the drill bit to drill on the broken coal rock mass 1, and drill a deep hole 2; specifically: select the location relatively closest to the fault fracture zone in the mining trough to place the drill rig, and the drill rig is connected with the drill bit. The depth of drilling needs to be relatively long. Generally, a geological drilling rig is equipped with a ￠93 drill. The direction, inclination...

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Abstract

The invention relates to the technical field of coal mine exploitation and discloses a grouting method and system of cracked coal rock mass. The grouting procedure is performed on the cracked coal rock mass of a back production gateway in front of a back production face, and the grouting method comprises the following steps: step 1. drilling a deep hole in the cracked coal rock mass by using a drill bit; step 2. inserting a hole packer connected with a slurry injection pipe and a grouting pipe in the deep hole, wherein the slurry injection pipe is connected with the front end of the hole packer, the grouting pipe is connected with the tail end of the hole packer, and the other end of the grouting pipe is connected with a chemical grouting machine; and step 3. sealing the hole and grouting section by section according to the depth of the deep hole, starting the chemical grouting machine to pressurize the hole packer to seal the hole, wherein a blocking piece is pushed away when a pressure value under which the blocking piece can be pushed away is reached, and then the slurry injection pipe grouts the deep hole. According to the invention, a hole is drilled in the cracked coal rock mass of the back production gateway in front of the back production face and grouting is performed section by section,the technique is simple, the low is low and the operation at the coal mining face is not affected.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a grouting method and system for broken coal and rock mass. Background technique [0002] In the process of coal mining, geological structures such as faults, folds, and fracture development zones are often encountered. The coal and rock masses are loose and broken, and large-scale roof caving, slabs, and water inrush accidents are prone to occur, which seriously threatens the safe production of coal mines. The implementation of grouting reinforcement to the broken coal and rock mass is an effective way to solve the above problems. According to the grouting material, it can be divided into two categories: cement grouting and chemical grouting. Cement-based grouting materials are not suitable for rapid reinforcement of coal and rock mass due to their shortcomings such as long curing time and inability to inject into small cracks. Chemical grouting materials belong to organic...

Claims

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Application Information

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IPC IPC(8): E21B33/13
Inventor 康红普冯志强杨景贺吕华文张镇
Owner TIANDI SCI & TECH CO LTD
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