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Artificial top construction method based on paste filling

A paste filling and artificial false roof technology, which is applied in the fields of backfill, earthwork drilling, safety devices, etc., can solve the problems of low filling slurry concentration, poor filling body homogeneity, and high risk of false roof falling over, achieving engineering The effect of small quantity, low construction cost and easy construction

Active Publication Date: 2016-05-04
UNIV OF SCI & TECH BEIJING +1
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AI Technical Summary

Problems solved by technology

[0004] At present, the underground artificial false roof is mostly constructed by the filling method. The filling slurry has a low concentration and is easy to segregate. For mines with poor ore and rock properties, the false roof formed by the original construction method has a high risk of falling

Method used

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  • Artificial top construction method based on paste filling
  • Artificial top construction method based on paste filling
  • Artificial top construction method based on paste filling

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Embodiment Construction

[0018] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0019] The invention provides a method for constructing an artificial false roof based on paste filling, which can be used for mining environment reconstruction when large-diameter deep hole mining is applied in weak ore bodies, improves operation safety, and realizes the safety of steeply inclined, medium-thick and weak ore bodies Efficient recovery. Such as figure 1 As shown, it is the longitudinal projection diagram of the artificial false roof constructed by this method, and its A-A section schematic diagram is shown in figure 2 As shown, its B-B cross-sectional schematic diagram is shown in image 3 shown.

[0020] The false roof is composed of steel pipe 1, bottom reinforcement 2, hanging reinforcement 3, paste filling body 4, beam head 5, log ...

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Abstract

The invention provides an artificial top construction method based on paste filling and belongs to the technical field of mining engineering. The method comprises the steps of drift excavation, beam head excavation, hanging bar arrangement and paste filling. According to the method, artificial top filling drifts are excavated firstly, and a steel bracket and a timber support are erected; secondly, chambers are excavated on the two sides of a roadway every other 3 m, and each chamber is 150 cm wide, 150 cm height and 200 cm deep; thirdly, bar arrangement is conducted, bottom bars and hanging bars are arranged, and the bottom bars include horizontal bars and longitudinal bars; fourthly, paste filling is conducted, strength reaches 4-5 Mpa within 28 days, and the mass concentration of paste is 78-80%. According to the method, work amount is small, construction cost is low, construction is easy, risks caused by insufficient span or excessive span of a filled artificial top are avoided, drilling safety is improved for workers, and high-level large-diameter deep-hole safe and efficient recovery of weak broken ore bodies can be achieved. The method provides a new idea for large-scale mining of the ore bodies.

Description

technical field [0001] The invention relates to the technical field of mining engineering, in particular to a method for constructing an artificial false roof based on paste filling. Background technique [0002] Large-diameter deep-hole mining process design generally excavates rock-drilling chambers horizontally in the upper part of the stope, uses large-diameter deep-hole drilling rigs to drill down deep holes, and uses spherical charges to collapse the ore layer by layer in the bottom-up sequence Or use the cutting vertical groove as the free surface to carry out side collapse ore, and the collapsed ore is transported out of the mine tunnel at the lower part of the stope. With its characteristics of high efficiency, high strength, low cost and safe operation, it promotes the development of mechanization, continuous and centralized operation of underground mining of metal mines, which is the development trend of safe and efficient mining. [0003] The large-diameter deep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00
CPCE21F15/00
Inventor 吴爱祥杨锡祥王洪江周发陆王少勇魏海涛李公成刘宁
Owner UNIV OF SCI & TECH BEIJING
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