Self-supporting method for surrounding rock of soft rock roadway and stirring injection drilling rig for support

A soft rock and roadway technology, applied in the field of stirred injection drilling rigs, can solve problems such as early release of masonry support body stress, anchor-spray support, unsatisfactory effect of anchor-spray combined with anchor cable support, and large roadway deformation. Achieve the effect of improving construction safety and using mechanization level, good self-supporting effect and reducing construction cost

Active Publication Date: 2017-03-01
张晓德
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]1. Soft rock undergoes plastic creep after being exposed to water, and the rock hole friction force on which anchor rods and anchor cables depend will be doubled; , The effect of anchor spraying and anchor cable support is not ideal, mainly because the deformation of the roadway is large; especially when it encounters water or is affected by mining, the deformation of the roadway is greater, and the repair rate of the roadway reaches 80%-90%
[0004] 2. Concrete masonry support, the construction process is complicated, the top of the masonry is difficult to fill, and the surrounding rock is disturbed greatly, so the support effect with initial support force cannot be achieved, which causes the stress release of the surrounding rock of the roadway to the masonry support body to be released in advance. Resulting in short roadway repair cycle
[0005]3. If the support effect can be achieved, the cost of support will increase too much if the anchor net is sprayed with U-shaped steel shed support and the combination of various support process equipment , making it unacceptable for mines or operators

Method used

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  • Self-supporting method for surrounding rock of soft rock roadway and stirring injection drilling rig for support
  • Self-supporting method for surrounding rock of soft rock roadway and stirring injection drilling rig for support
  • Self-supporting method for surrounding rock of soft rock roadway and stirring injection drilling rig for support

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Embodiment 1

[0038] Example 1 Description of the supporting method

[0039] A self-supporting method for the surrounding rock of a soft rock roadway, the steps are: crushing the soft rock of the soft rock surrounding rock of the roadway, stirring and mixing the curing agent, and compacting it at the rear, mixing the curing agent and the chopped soft rock The rock is fully mixed, so that the surrounding rock of the roadway fully mixed with the curing agent is basically solidified in situ to form a supporting rock mass with supporting capacity, and the surrounding rock of the roadway itself is consolidated as aggregate to harden and become complete.

[0040] The present invention takes 1200mm as an example to further illustrate: after part of the soft rock surrounding rock reaches a certain hardness, the thicker the hardened soft rock, the higher the supporting strength. It is to use physical and chemical methods to add a curing agent that can harden the soft rock; the surrounding rock of th...

Embodiment 2

[0044] Example 2 Explanation of the Stirring Drilling Rig

[0045] A stirring injection drilling rig for soft rock roadway support, comprising a drill bit power box 10, a lifting rocker arm 11, a hydraulic jack 12, a left and right turntable 14, a grouting mixing mechanism 15, a machine body 16, and a walking crawler belt 17, and a pair of A gear-type meshing drill bit 8, the drill bit is sleeved on one end of the octagonal drill rod 3, and the other end of the octagonal drill rod 3 passes through the octagonal holes at the center of the two power output gear shafts of the drill power box 10; The top of the teeth of the drill bit is provided with small serrations 1, and each tooth is equidistantly equipped with small serrations 1, and the small serrations are arranged radially and spirally on the teeth 2, and the spiral directions of the two drill bits are opposite; A small pulp hole 4, the small pulp hole 4 on the gear teeth is arranged in the middle between the two small ser...

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Abstract

The invention belongs to the technical field of shaft engineering support in underground mining, particularly relates to a soft rock roadway surrounding rock self-support method and a soft rock roadway support stirring injection drilling machine, and mainly solves the support problem of a cracked or soft rock stratum construction roadway with low hardness (Platts hardness coefficient f<=3). By injecting curing agents into roadway surrounding rocks in a stirring manner, the lithology of the roadway surrounding rocks is changed, so that the roadway surrounding rocks have corresponding self-strength, integrity and supporting strength and are automatically cured in situ, gapless undisturbed support of the roadway surrounding rocks is ensured, and the gapless non-yield support mechanism of roadway support is realized.

Description

technical field [0001] The invention belongs to the technical field of well roadway engineering support in underground mining, and specifically relates to a self-supporting method for soft rock roadway surrounding rock and a stirring injection drilling rig for soft rock roadway support. f≤3) and the support problem of the construction roadway in soft rock formation. Background technique [0002] The existing support technologies for soft rock roadways in soft rock formations mainly include anchor spray support, anchor spray support with anchor cable support, concrete masonry support, anchor net spraying plus U-shaped steel shed support, and various support technologies. Combined application of equipment, these supports have the following deficiencies in practical application: [0003] 1. Soft rock undergoes plastic creep after being subjected to water stress, and the rock hole friction force on which the anchor rod and anchor cable depend will be reduced exponentially; the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00E21B7/02E21B3/02E21B10/43
Inventor 张晓德巩祥明张润范
Owner 张晓德
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