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High fly ash and coal gangue dry mixed guniting material for underground anchor net support

An anchor mesh support and coal gangue technology, which is applied in the field of building materials, can solve the problems of large randomness of operation, difficult to master the ratio, large dust pollution, etc., to avoid waste, reduce the number of operators, and protect the environment.

Active Publication Date: 2015-12-02
SHANXI SHANGYITONG BUILDING MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to solve the problems of on-site mixing of existing shotcrete materials, the proportion is not easy to grasp, the operation is random, the rebound rate is high, the cohesion is poor, and the dust pollution is large, etc., and the present invention provides a high-mixing fly ash and coal Dry-mixed shotcrete material for underground anchor net support of gangue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: A dry-mixed shotcrete material for underground anchor net support with high content of fly ash and coal gangue, consisting of the following raw materials: fly ash 800kg, coal gangue 800kg, cement 50kg, slag powder 50kg, 5kg of silicon dioxide, 30kg of micro-silica powder, 5kg of naphthalene-based water reducing agent; 0.1kg of polypropylene fiber. The cement is ordinary Portland cement with a strength grade of 42.5; the crushed particle size of the coal gangue is 5 mm; and the length of the polypropylene fiber is 25 mm.

[0022] After the coal gangue is crushed, the above-mentioned raw materials can be mixed uniformly. When in use, the mixed above-mentioned raw materials are mixed and stirred with water in a mixing shotcrete machine, and then directly transported to the underground injection construction site and directed at the working surface for injection.

[0023] The fly ash is the third-grade fly ash of Changzhi Power Plant; the coal gangue is the gangue pro...

Embodiment 2

[0026] Example 2: A dry-mixed shotcrete material for underground anchor net support with high content of fly ash and coal gangue, consisting of raw materials of the following weights: fly ash 1500kg, coal gangue 1500kg, cement 100kg, slag powder 100kg, 10kg of silicon dioxide, 60kg of microsilica powder, 7kg of naphthalene-based water reducing agent; 0.2kg of polypropylene fiber. The cement is Portland cement with a strength grade of 42.5; the pulverized particle size of the coal gangue is 10 mm; and the length of the polypropylene fiber is 30 mm. The implementation method is the same as in Example 1.

Embodiment 3

[0027] Example 3: A dry-mixed shotcrete material for underground anchor net support with high content of fly ash and coal gangue, consisting of raw materials of the following weights: fly ash 1800kg, coal gangue 1800kg, cement 200kg, slag powder 150kg, Silicon dioxide 8kg, micro silicon powder 100kg, naphthalene water reducing agent 10kg; polypropylene fiber 0.3kg. The cement is ordinary Portland cement with a strength level of 42.5; the crushed particle size of the coal gangue is 15 mm; and the length of the polypropylene fiber is 20 mm. The implementation method is the same as in Example 1.

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Abstract

Belonging to the technical field of building materials, the invention provides a high fly ash and coal gangue dry mixed guniting material for underground anchor net support to solve the problems of difficult control of proportion, great operation arbitrariness, high rebound rate, poor cohesiveness, large dust pollution and the like in existing guniting material on-site blending. The high fly ash and coal gangue dry mixed guniting material is composed of the following raw materials: 800-1800 parts of fly ash, 800-1800 parts of coal gangue, 50-200 parts of cement, 50-150 parts of slag powder, 5-10 parts of silica, 30-100 parts of silica fume, 5-10 parts of a naphthalene water reducer, and 0.1-0.3 part of polypropylene fiber. The guniting material provided by the invention solves the problems of waste of resources and environmental pollution, reduces the production cost and protects environment. The number of underground operation workers and mixing equipment are reduced, the labor intensity is reduced, and the safety factor is enhanced. The material has strong adhesive force, few rebound material, high cohesiveness, and high support strength, avoids waste of a large number of floor materials, improves the benefits, saves manpower, and achieves a storage life of 2-3 years without deterioration.

Description

Technical field [0001] The invention belongs to the technical field of building materials, and specifically relates to a dry-mixed shotcrete material for underground anchor net support with high content of fly ash and coal gangue. Background technique [0002] Coal gangue is a solid waste discharged during coal mining and coal washing. It is a dark-gray rock with lower carbon content and harder than coal that is associated with coal seams during coal formation. Including the excavation gangue in the process of roadway excavation, the gangue extracted from the roof, floor and interlayer during the excavation process, and the washing gangue picked out during the coal washing process. Its main component is Al 2 O 3 , SiO 2 , It also contains different amounts of Fe 2 O 3 , CaO, MgO, Na 2 O, K 2 O, P 2 O 5 , SO 3 And trace rare elements (gallium, vanadium, titanium, cobalt). [0003] Coal gangue is waste rock associated with coal. Solid waste discharged in the process of tunneling, m...

Claims

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Application Information

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IPC IPC(8): C04B28/02C04B18/14C04B18/08C04B18/04C04B16/06
CPCY02W30/91
Inventor 李树青
Owner SHANXI SHANGYITONG BUILDING MATERIAL TECH CO LTD
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