Three-incompetent bed cutting hole large section construction and supporting method

A large-section, hole-cutting technology, which is applied in earthwork drilling, mining equipment, tunnels, etc., can solve problems such as long installation period, limited installation speed by brush expansion speed, and poor environmental conditions, so as to reduce labor intensity and shorten installation period , The effect of reducing the amount of engineering

Active Publication Date: 2015-11-11
LONGKOU MINING GRP
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Problems solved by technology

[0005] (1) Many people are employed, the efficiency is low, the installation period is long, and the speed of brush expansion restricts the installation speed
[0006] (2), there are many links, the process is complicated, and the management is difficult
[0007] (3) Blasting is used to expand the brush, artificial gangue is produced, and the technology is backward
[0008] (4) Poor environmental conditions are not conducive to safety management
The working space for personnel is narrow, and the coal gangue can be directly collapsed to the installed supports by blasting

Method used

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with specific embodiments, and the advantages and characteristics of the present invention will become clearer along with the description. However, these embodiments are only exemplary and do not constitute any limitation to the scope of the present invention. It should be understood by those skilled in the art that the details and forms of the technical solution of the present invention can be modified or replaced without departing from the spirit and scope of the present invention, but these modifications and replacements all fall within the protection scope of the present invention .

[0018] The present invention relates to a large-section construction of three-soft rock layer cutout and its supporting method, which includes the following steps in turn: construction of cutout and its supporting step; secondary expansion and brushing construction of the large section of the cutout and its supporting...

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Abstract

The invention relates to a three-incompetent bed cutting hole large section construction and supporting method. The method sequentially comprises a step of cutting hole construction and supporting and a step of cutting hole large section secondary brush expansion construction and supporting. The cutting hole construction step comprises a step of large section primary construction and a step of cutting hole normal section construction. The three-incompetent bed cutting hole large section construction and supporting method has the advantages of shortening a working face installing construction period, reducing the project amount of cutting hole blasting brush expansion during the working face installing period, lowering workers' labor intensity and reducing investment of a supporting material.

Description

technical field [0001] The invention relates to a large-section construction of three-soft rock stratum cut hole and a supporting method thereof. Background technique [0002] The coal-bearing strata in the Liangjia Minefield in the Longkou Mining Area are the Paleogene Lijiaya Formation, in which Coal 1 Oil 2 is one of the main recoverable strata in this area, with stable layers, simple structure, no or occasionally containing a rock, pure coal The thickness is 0.57-2.24m, with an average of 1.03m. The immediate roof of Coal 1 is oil-bearing mudstone to oil-bearing siltstone, and part of it is Oil 1; the lithology is compact, hard and tough, and it is a medium caving roof. The compressive strength of the roof in the natural state 31.4~48.3MPa, the average is 39.7Mpa, Platinum hardness coefficient f=2.9. The floor is oil 2 and oily mudstone. The average compressive strength in the natural state is 49.1Mpa, and the Platinum hardness coefficient f=4.7. [0003] Problems e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D20/00
Inventor 任尧喜姜作华倪兵义丁国利董华旭
Owner LONGKOU MINING GRP
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