Working slurry of stop-grouting plug for mine ground pre-grouting

A pre-grouting and grout stopper technology, which is applied in the field of mine ground pre-grouting grout stopper working mud, can solve the problems of unsuitable pre-grouting construction, long mud treatment cycle, high cost, etc., and meet the requirements of high mud performance , Suppression of collapse and stable performance

Active Publication Date: 2012-04-18
BEIJING CHINA COAL MINE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the high polymer mud is mixed with sweeping rock powder, the mud treatment cycle is long. If the mud is frequently updated during actual construction, there are problems of high cost and serious pollution, so it is not suitable for pre-grouting construction on the shaft surface.

Method used

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  • Working slurry of stop-grouting plug for mine ground pre-grouting

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1, the present invention uses fresh water and bentonite as basic raw materials, with soda ash, sodium carboxymethyl cellulose, potassium humate, sucrose, anti-slump lubricant as treatment agent, and when the collapse-off block phenomenon is serious, add anti-slump lubricant, Configure 1m 3 Mud, the quality of each component is:

[0019] Water: 910kg

[0020] Bentonite: 200kg

[0021] Soda ash: 3.5kg

[0022] Sodium carboxymethyl cellulose: 0.1kg

[0023] Potassium humate: 1.5kg

[0024] Sucrose: 1.0kg

[0025] Anti-slump lubricant: 0.8kg

[0026] The viscosity of the mud funnel is 18s, the water loss is 12mL / 30min, and the thickness of the mud skin is 0.7mm. After mixing with the single-liquid cement slurry, the initial setting time of the single-liquid cement slurry is extended to 17h, and the final setting time is extended to 203h.

Embodiment 2

[0027] Embodiment 2, the present invention uses fresh water and bentonite as basic raw materials, with soda ash, sodium carboxymethyl cellulose, potassium humate, sucrose as treatment agent, configures 1m 3 Mud, the quality of each component is:

[0028] Water: 894kg

[0029] Bentonite: 250kg

[0030] Soda ash: 4.0kg

[0031] Sodium carboxymethyl cellulose: 0.1kg

[0032] Potassium humate: 1.8kg

[0033] Sucrose: 1.4kg

[0034] The viscosity of the mud funnel is 19s, the water loss is 9mL / 30min, and the thickness of the mud skin is 0.6mm. After mixing with the single-liquid cement slurry, the initial setting time of the single-liquid cement slurry is extended to 19.5h, and the final setting time is extended to 280h.

Embodiment 3

[0035] Embodiment 3, the present invention uses fresh water and bentonite as basic raw materials, with soda ash, sodium carboxymethyl cellulose, potassium humate, sucrose, and anti-slump lubricant as treatment agents, and configures 1m 3 Mud, the quality of each component is:

[0036] Water: 875kg

[0037] Bentonite: 300kg

[0038] Soda ash: 4.0kg

[0039] Sodium carboxymethyl cellulose: 0.1kg

[0040] Potassium humate: 2.0kg

[0041] Sucrose: 1.8kg

[0042] Anti-slump lubricant: 1.0kg

[0043] The viscosity of the mud funnel is 22s, the water loss is 13mL / 30min, and the thickness of the mud skin is 0.8mm. After mixing with the single-liquid cement slurry, the initial setting time of the single-liquid cement slurry is extended to 23h, and the final setting time is extended to 315h.

[0044] Before stopping the slurry in the bedrock section and pulling the plug, the water loss of the mud should be adjusted to within the range of 6-10mL / (30min), the thickness of the mud sk...

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Abstract

The invention relates to working slurry of a stop-grouting plug for mine ground pre-grouting, comprising the following components in portions by weight: 881-912 portions of water, 200-300 portions of bentonite, 3-4.5 portions of calcined soda, 0.1 portion of sodium carboxymethyl cellulose, 1.0-2.5 portions of potassium humate and 0.75-1.85 portions of sucrose. The invention is used in the field of ground pre-grouting, and can effectively reduce the accident probability of the stop-grouting plug in a working state, such as fracture plug burial, channeling slurry plug burial, differential pressure sticking, and the like, ensure the safety and the high efficiency of the grouting and the mine construction and have the favorable application prospect.

Description

Technical field: [0001] The invention relates to the field of ground pre-grouting for coal mine construction, and is particularly suitable for a mine ground pre-grouting grout stopper working mud used in ground pre-grouting projects with a mine depth exceeding 800m or passing through complex formations. Background technique: [0002] During the grouting hole drilling construction, in addition to various complicated situations such as water leakage, water gushing, sand gushing, hole wall expansion and shrinkage, hole wall surface peeling, block falling, disintegration and collapse, etc., due to the particularity of the process, It has its own characteristics: it takes a long time to use and maintain (several months or even more than ten months), the hole diameter is required to be uniform (to ensure the smooth up and down of the slurry plug and the slurry stop), the segmented slurry stop in the hole and the drill tool and the slurry stop The plug stays in the hole for a long ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/18
Inventor 丁振宇高晓耕徐润郑军周兴旺
Owner BEIJING CHINA COAL MINE ENG CO LTD
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