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Lateral top cutting and pressure relief equipment and top cutting and pressure relief method for coal pillar dam body of underground reservoir

A technology of roof cutting and pressure relief, underground reservoir, applied in mining equipment, underground mining, surface mining and other directions, can solve the problems of unstable roof cutting effect and high equipment failure rate

Active Publication Date: 2020-11-24
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The equipment in this application is drilled ahead of the working face during construction, and a side thruster is installed in the borehole behind the working face. The explosion-proof pump station provides hydraulic pressure for the side thruster. A huge thrust is generated to split the roof rock layer on the free face, thereby cutting the roof. Although it provides an operation different from the above-mentioned roof cutting method, the roof cutting equipment in this application is not stable in actual use, and the failure rate of the equipment is low. high

Method used

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  • Lateral top cutting and pressure relief equipment and top cutting and pressure relief method for coal pillar dam body of underground reservoir
  • Lateral top cutting and pressure relief equipment and top cutting and pressure relief method for coal pillar dam body of underground reservoir
  • Lateral top cutting and pressure relief equipment and top cutting and pressure relief method for coal pillar dam body of underground reservoir

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Experimental program
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Effect test

Embodiment 1

[0063] The lateral roof cutting and pressure relief equipment of the coal pillar dam body of the underground reservoir in this embodiment includes:

[0064] An upper plate 1, which is composed of a main body upper plate 10 and an auxiliary body upper plate 11 connected horizontally;

[0065] The support bottom plate 2 is composed of a main body bottom plate 20 and an auxiliary body bottom plate 21 connected horizontally;

[0066] Support unit 3, which is placed between the upper plate 1 and the bottom plate 2 of the bracket, and supports the lifting movement of the upper plate 1;

[0067] The cutting unit 4 is placed between the upper plate 1 and the support bottom plate 2. The main body upper plate 10 is provided with a cutting opening 100. The working end of the cutting unit 4 passes through the cutting opening 100 from the upper surface of the main body upper plate 10. stick out;

[0068] Cutting mobile unit 5, which is placed between the upper plate 1 and the support bot...

Embodiment 2

[0074] The lateral roof cutting and pressure relief equipment for the coal pillar dam of the underground reservoir in this embodiment is further improved on the basis of Embodiment 1, and a large wide-angle spraying device 102 is provided next to the cut out opening 100 on the main body upper plate 10 .

[0075] Such as figure 2 and image 3 As shown, when the working end of the cutting unit 4 passes through the cutting opening 100 to cut the overlying rock of the suspended roof, a large amount of dust will be generated there. In this embodiment, a large wide-angle spray device 102 is set to effectively reduce dust and cool down. Improve the working environment of the working surface 4000 and ensure the effective work of the cutting unit 4, and at the same time, the large wide-angle spray device 102 will not produce too much water, which will not affect the normal work.

Embodiment 3

[0077] The lateral roof cutting and pressure relief equipment for the coal pillar dam of the underground reservoir in this embodiment is further improved on the basis of Embodiment 2. A distance sensor 101 is provided at the end of the main body upper plate 10 away from the auxiliary body upper plate 11 .

[0078] Such as figure 2 and image 3 As shown, the distance sensor 101 of this embodiment can sense the distance change between the goaf 3000 collapsed rock mass and the device, thereby assisting in locking the position where roof cutting and pressure relief are required. Further, the data monitored by the distance sensor 101, The data on the actual advance distance of 4000 meters on the working face obtained during the team handover, combined with the two sets of data, can further accurately locate the position that needs roof cutting and pressure relief.

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Abstract

The invention discloses a lateral top cutting and pressure relief equipment and a top cutting and pressure relief method for a coal pillar dam body of an underground reservoir, and belongs to the technical field of underground mining of coal mines. The equipment comprises an upper plate, a bracket bottom plate, a supporting unit, a cutting unit, a cutting movement unit and a pushing unit, whereinthe supporting unit is used for supporting the upper plate to move up and down; the cutting unit is arranged between the upper plate and the bracket bottom plate, a main body upper plate is provided with a cutting receding opening, and the working end of the cutting unit penetrates through the cutting receding opening and extends out of the upper surface of the main body upper plate; the cutting movement unit drives the cutting unit to move and work; and the pushing unit drives the lateral top cutting and pressure relief equipment for the coal pillar dam body of the underground reservoir to move. According to the equipment, on the one hand, stable placement can be ensured during the top cutting and pressure relief operation, on the other hand, the disturbed hanging exposed roof covering rock can be effectively supported in the cutting process through the supporting upper plate, and a good construction environment is provided; and then, the cutting unit can smoothly and orderly cut thehanging exposed roof covering rock, and the equipment moves automatically after the top cutting and pressure relief is finished, so that the roof cutting and pressure relief operation of a lateral hanging exposed roof is ensured to be performed in time.

Description

technical field [0001] The invention belongs to the technical field of underground mining of coal mines, and more specifically relates to a lateral roof cutting and pressure relief device for a coal pillar dam body of an underground reservoir and a roof cutting and pressure relief method. Background technique [0002] Coal mine underground reservoir engineering is an effective way to protect and utilize water resources. Coal pillar dams are subjected to multi-factorial and graded stresses during coal mining and coal mine goaf reservoir construction, so the coal pillar dam during the mining period is minimized. Mining stress damage is the key to maintaining the long-term stability and long-term operation of the coal pillar dam body of the coal mine underground reservoir. Cutting off the coal mine roof that is suspended laterally from the coal pillar dam body is one of the main means. [0003] At present, the main methods of cutting off the suspended roof of coal mines widely ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C37/26E21C35/22E21D23/04E21D23/16E21D23/03E21F17/18E21C41/18
CPCE21C37/26E21C35/22E21D23/04E21D23/0418E21D23/16E21D23/03E21F17/18E21C41/18
Inventor 王方田邵栋梁
Owner CHINA UNIV OF MINING & TECH
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