Roadway protection method based on small coal pillar
A technology of small coal pillars and roadway protection, which is applied in the direction of earthwork drilling, pillar/bracket, ground mining, etc. It can solve the problems of roadway deformation, limited bearing capacity, easy and falling off of anchorage sections, etc., to reduce width, avoid waste, The effect of enhancing the support effect
Active Publication Date: 2021-05-25
CHINA UNIV OF MINING & TECH (BEIJING) +1
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Problems solved by technology
However, the small coal pillars left along the goaf roadway have relatively low strength, limited bearing capacity, and are easily crushed and deformed. Therefore, it is very necessary to enhance the strength and stability of the small coal pillars.
At present, the reinforcement method for small coal pillars is mainly to use anchor rods and anchor cables for reinforcement. However, the roadway under the support of ordinary anchor rods and anchor cables is seriously deformed, the anchorage section is easy to fall off, and the support effect is not good.
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[0023] A method for road protection based on small coal pillars according to an embodiment of the present application will be described in detail below with reference to the accompanying drawings.
[0024] It should be clear that the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.
[0025] figure 1 The support schematic diagram of the first embodiment of the road protection method based on small coal pillars of the present application, such as figure 1 As shown in the figure, the roadway protection method based on small coal pillars in this embodiment includes: reserving small coal pillars between the lower trough roadway of the first coal mining face and the upper trough roadway of the second coal mining f...
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The embodiment of the invention discloses a roadway protection method based on a small coal pillar, and relates to the technical field of mines. The problems that a roadway supported by common anchor rods and anchor cables deforms seriously, and the supporting effect is poor are solved. The roadway protection method based on the small coal pillars comprises the steps that the small coal pillars are reserved between a lower crossheading roadway of a first coal face and an upper crossheading roadway of a second coal face, and the first coal face is adjacent to the second coal face; oppositely-penetrating anchor cable supports are applied to the reserved small coal pillars, the two ends of the anchor cables are connected together through steel beams, and deformation of the small coal pillars is limited; and a first pressure relief kerf and a second pressure relief kerf are formed in the upper roof area. The stress in a rock mass is redistributed through the pressure relief kerfs, and the stress acting on the junction of the lower crossheading roadway and a roof is transferred to the deep part in the upper roof area in the pressure relief kerf direction. The method is suitable for reinforcing deep small coal pillars and roadways thereof.
Description
technical field [0001] The present application relates to the technical field of mining, and in particular, to a road protection method based on small coal pillars. Background technique [0002] The small coal pillar mining technology is an extension of the non-coal pillar mining technology, and it is a major reform technology of coal mining methods in my country's coal mines. However, the strength of the small coal pillars left in the gob-side roadway is relatively low, the bearing capacity is limited, and it is easy to be crushed and deformed. Therefore, it is very necessary to enhance the strength and stability of the small coal pillars. At present, the reinforcement method for small coal pillars is mainly to use bolts and cables. However, the roadway under the support of ordinary bolts and cables is seriously deformed, the anchoring section is easy to fall off, and the supporting effect is not good. SUMMARY OF THE INVENTION [0003] In view of this, the embodiments of...
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IPC IPC(8): E21C41/18E21D15/00E21D20/02E21D21/00
CPCE21C41/18E21D15/00E21D20/02E21D21/00
Inventor 郭东明李学彬张毅
Owner CHINA UNIV OF MINING & TECH (BEIJING)