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A method of supporting an open-air slope

A slope, open-air technology, applied in excavation, infrastructure engineering, construction, etc., can solve problems such as unenvironmental protection, poor support effect, landslide collapse, etc., and achieve the effect of strong tensile strength

Active Publication Date: 2019-12-27
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems that the current open-air slope support technology is high in cost, not environmentally friendly, has poor support effect, landslide collapse has occurred, and the construction period is long, and provides an environmentally friendly, efficient and safe open-air support method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This support method is applied to the support of the open-pit 4# slope of the Suoerkuduk Copper Mine in Xinjiang. The exposed area of ​​the slope is 1600㎡.

[0033] Firstly, a new type of composite cementing material with a thickness of 50 mm is sprayed on the surface of slope 1. The composite cementing material is composed of cement, mineral processing tailings, fly ash, and steel fibers, and its mass ratio is cement: mineral processing tailings: fly ash: steel fiber = 1:6:2:1.2, a total consumption of 29t of cement, 175t of beneficiation tailings, 58t of fly ash, 34.8t of steel fiber, cement: water = 0.5, a total of 14.5t of water consumption, the above components are fully mixed and stirred for 5min, of which, The grade of cement is R32.6, and the fine tailings of 37um are selected as the beneficiation tailings.

[0034] The amount of quick-setting agent added is 1.5% of the weight of the cement, and a total of 435kg of quick-setting agent is consumed. After fully st...

Embodiment 2

[0041] This support method is applied to the support of an open-pit slope of a domestic copper mine, and the exposed area of ​​the slope is 1500㎡.

[0042] Firstly, a new type of composite cementing material with a thickness of 100 mm is sprayed on the surface of slope 1. The composite cementing material is composed of cement, mineral processing tailings, fly ash, and steel fibers, and its mass ratio is cement: mineral processing tailings: fly ash: steel fiber = 1:6:2:1.2, a total consumption of cement 29t, beneficiation tailings 175t, fly ash 58t, steel fiber 34.8t, cement: water = 0.56t, a total consumption of water 16.24t, the above components were fully mixed and stirred for 10min, of which , the cement label is R32.6, and the beneficiation tailings are 37um fine tailings.

[0043] The amount of quick-setting agent added is 2% of the cement weight, and a total of 580kg of quick-setting agent is consumed. After being fully stirred for 5 minutes, after mixing evenly, it is s...

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Abstract

The invention discloses a supporting method for an open slope. The supporting method comprises the following steps: (1) performing primary spraying, namely, spraying a composite cementing material with the thickness of 50 to 100 mm on the surface of the slope, and standing for 30 minutes; (2) drilling holes, namely, drilling a plurality of deep holes in the slope uniformly, cleaning rock fragments around on the drilled holes, and mounting funnel bases at the openings of the drilled holes; (3) grouting, wherein the flow rate of grouting is 10 to 20 L / min, and grouting cement mortar into the drilled holes in the step (2) according to the following steps: a, inserting mortar conveying pipes of grouting equipment into the funnel bases at an interval of a drilled hole, grouting the drilled holes in the periphery first, and then grouting the inside drilled holes in sequence; b, similarly, grouting the remaining drilled holes in the sequence of grouting the drilled holes in the periphery first and then grouting the inside drilled holes; (4) forming a drainage ditch; (5) paving a reinforcing mesh, namely, paving the reinforcing mesh on the surface of the slope; and (6) performing secondary spraying, namely, spraying the composite cementing material which is used in the step (1) again on the surface of the reinforcing mesh of the step (5).

Description

technical field [0001] The invention relates to the technical field of slope support technology, in particular to a support method for an open-air slope. Background technique [0002] In open-pit mining, ensuring the stability of the slope is an extremely critical link in open-pit mining. Due to the influence of various factors such as differentiation, rainfall, and blasting vibration, the open-pit slope will be damaged if a timely and appropriate support method is not adopted. Once it collapses, it often causes heavy casualties and economic losses. [0003] The current open-air slope support technology is expensive, not environmentally friendly, and the support effect is poor. Landslides and collapses have occurred, and the construction period is long. Contents of the invention [0004] The present invention aims at the problems of high cost, non-environmental protection, poor support effect, landslide collapse and long construction period in the current open-air slope s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/20C04B28/04C04B14/48
CPCC04B14/48C04B28/04E02D17/207C04B18/12C04B18/08C04B22/002C04B2103/12C04B14/00C04B14/06
Inventor 焦满岱张晨洁刘涛柴衡山刘武团严文炳郝显福张睿
Owner NORTHWEST RES INST OF MINING & METALLURGY INST