Construction method for opening off small-section underground chamber of coal mine rock roadway into large-section underground chamber

A construction method and small-section technology, applied in mining equipment, earth-moving drilling, tunnels, etc., can solve the problems of slow construction progress, unfavorable high-yield and high-efficiency mine construction, etc. Effect

Inactive Publication Date: 2012-08-01
李菊菊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What CN200910237883.7 adopts is to excavate the small section of the slope first, and then step construction, and its construction progress is relatively slow, which is not conducive to the construction of high-yield and high-efficiency mines

Method used

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  • Construction method for opening off small-section underground chamber of coal mine rock roadway into large-section underground chamber
  • Construction method for opening off small-section underground chamber of coal mine rock roadway into large-section underground chamber
  • Construction method for opening off small-section underground chamber of coal mine rock roadway into large-section underground chamber

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] figure 1 Shown is the cross-sectional view of the chamber of the present invention, that is, the construction steps of the chamber top team 2, during construction, at the top of the rock roadway 1, 2 meters ahead of the design starting position of the chamber, according to the angle 5 with the longitudinal inclination 70°direction to drill and shoot. Then pick the roof in two layers, from the bottom to the top, first pick the first layer below, after the roof anchor net support, then pick the second layer, and then carry out the roof anchor net support, reach the predetermined position The design height of the overhang.

Embodiment 2

[0033] figure 2 It is the front view of the chamber, that is, the shape of the chamber after construction, and the shaded part in the figure is the part to be constructed.

[0034] On the basis of the existing rock roadway 1, it is expanded into a large-section chamber. Firstly, the top 2 of the chamber is drilled and blasted, then the roof is layered, and finally sprayed for support; In the direction of the chamber, the sides are brushed and sprayed for support in sequence, and finally the designed large-section chamber is formed.

Embodiment 3

[0036] Taking Qianying Coal Mine 3211 Wind Lane as the basis to expand into a large section chamber as an example, to solve the need to install the hoisting fully mechanized mining support on the 3211 working face of Qianying Coal Mine, an assembly chamber was constructed in the chamber of the 3211 Wind Lane Union Lane. The gross cross-section of the designed chamber reaches: width 7.6m, height 8.093m, cross-sectional area 61.5m 2 ; The net section is 7.4m wide, 7.993m high, and 59.15m sectional area 2 , The construction length is 30m.

[0037] The construction method of expanding the small section of the rock lane into a large section chamber is realized by the following construction methods:

[0038] (1) At the top of the rock roadway and 2 meters in front of the design starting position of the chamber, drill holes and shoot in a direction inclined 70° to the longitudinal direction, and carry out anchor net support after the shooting;

[0039] (2) Continue the above steps ...

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Abstract

The invention relates to a construction method for opening off a small-section underground chamber of a coal mine rock roadway into a large-section underground chamber. The construction method comprises the following steps of: drilling and blasting on the top of the rock roadway at a design starting position of the underground chamber at an angle of 70 degrees tilting relative to the longitudinal direction; layering and roof-ripping; clearing by using a scraper loader; brushing the wall while spraying slurry; and the like. The construction method has the advantages of optimizing construction processes, greatly increasing the production efficiency, reducing the labor intensity of workers and increasing the safety coefficient during construction. The construction has high adaptability; the small-section underground chamber can be opened off into the large-section underground chamber on the basis of the conventional small-section rock roadway; the time is saved; and the resource waste is also avoided.

Description

technical field [0001] The invention relates to a construction method of an underground chamber in a coal mine, in particular to a construction method for expanding a small section of a coal mine rock roadway into a large section chamber. Background technique [0002] At present, in the field of underground mines and other operations, chambers have been more and more widely used for installing various equipment and machines, storing materials and tools, or as workers' restrooms and refuge rooms. Since chambers are space structures with large cross-sections or short lengths that are excavated and constructed underground, they are often in complex geological conditions and will be affected by natural geological conditions such as ground stress, geological rock formations, groundwater and other factors and artificial excavation. operation and other factors. Different excavation construction methods are carried out according to the characteristics of different chambers. For exa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/01
Inventor 陈鹏彭继勇殷召元罗昆张宏忠孙传锦解波刘洪伟
Owner 李菊菊
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