Coal mine fully mechanized coal mining face end top cutting pressure releasing device and top cutting pressure releasing method

A fully mechanized mining face, roof cutting and pressure relief technology, applied in mining equipment, surface mining, underground mining, etc., can solve problems such as high equipment failure rate and unstable roof cutting effect

Active Publication Date: 2020-12-25
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 lateral thruster is installed in the borehole lagging behind the working face. The explosion-proof pump station provides hydraulic pressure to the lateral thruster. Generates a huge thrust to split the roof rock layer on the free surface, thereby cutting the roof. Although it provides an operation different from the existing roof cutting method, the solution in this application has unstable roof cutting effect and equipment failure rate in actual use. high
There are many flaws in the use

Method used

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  • Coal mine fully mechanized coal mining face end top cutting pressure releasing device and top cutting pressure releasing method
  • Coal mine fully mechanized coal mining face end top cutting pressure releasing device and top cutting pressure releasing method
  • Coal mine fully mechanized coal mining face end top cutting pressure releasing device and top cutting pressure releasing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The top cutting and pressure relief equipment for the fully mechanized coal mining face of 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] Cutting unit 4, which is placed between the main body upper plate 10 and the main body bottom plate 20, the end of the main body upper plate 10 away from the auxiliary body upper plate 20 is provided with a cutting relief opening 100 along the width direction, and the working end of the cutting unit 4 passes through the cutting The relief port 100 protrudes from the upper surface of the main body upper plate 10;

...

Embodiment 2

[0075] The top-cutting and pressure-relief equipment for the fully mechanized coal mining face of this embodiment is further improved on the basis of Embodiment 1. The support unit 3 is a hydraulic column, and four main body upper plates 10 and the main body bottom plate 20 are provided with four Hydraulic column support, two hydraulic column supports are provided between the upper plate 11 of the auxiliary body and the bottom plate 21 of the auxiliary body.

[0076] Such as image 3 As shown, in this embodiment, the upper plate 1 and the support bottom plate 2 are supported by the hydraulic column, and the relative distance between the upper plate 1 and the support bottom plate 2 is controlled by the expansion and contraction of the hydraulic column, and four main body upper plate 10 and the main body bottom plate 20 are arranged. Hydraulic column support, four hydraulic columns are arranged in two rows along the length direction of the main body support plate 20, and two hyd...

Embodiment 3

[0078] The top cutting and pressure relief equipment for the fully mechanized coal mining face of this embodiment is further improved on the basis of Embodiment 2. The middle part of the hydraulic column between the main body upper plate 10 and the main body bottom plate 20 near the cutting relief port 100 is set There is a distance sensor 101 .

[0079] Such as image 3 As shown, the distance sensor 101 of this embodiment can sense the distance change between the collapsed rock mass and the equipment, so as to assist in locking the position where roof cutting and pressure relief are required. Further, the data monitored by the distance sensor 101 is matched with the working face 4000 The actual moving distance is the cutting distance of the shearer at 4000 on the working face. The combination of the two sets of data can further accurately locate the position that needs to be cut and relieved.

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Abstract

The invention discloses coal mine fully mechanized coal mining face end top cutting pressure releasing device and a top cutting pressure releasing method, and belongs to the technical field of coal mine underground mining. The equipment comprises an upper plate, a support bottom plate, a supporting unit, a cutting moving unit and a pushing unit, wherein the supporting unit supports the upper plateto do lifting motion; the cutting unit is arranged between the upper plate and the support bottom plate, a cutting receding opening is formed in the main body upper plate, and the working end of thecutting unit penetrates through the cutting receding opening and extends out of the upper surface of the main body upper plate; the cutting moving unit drives the cutting unit to move and work; and the pushing unit drives the coal mine fully mechanized coal mining face end top cutting pressure releasing device to move. According to the device, on one hand, stable placement can be ensured during top cutting pressure releasing operation, on the other hand, disturbed suspended and exposed cover rock can be effectively supported in the cutting process by supporting the upper plate, a good construction environment is provided, then the suspended and exposed cover rock at the end position can be stably and orderly cut off through the cutting unit, so that concentrated stress is transferred to aninter-roadway coal pillar or a deeper part, and then the mining condition of the working face is optimized.

Description

technical field [0001] The invention belongs to the technical field of coal mine underground mining, and more specifically relates to a top cutting pressure relief device and a top cutting pressure relief method for fully mechanized coal mining working faces. Background technique [0002] In recent years, the advantages of my country's coal mining technology are mainly concentrated in automation equipment, intelligent operation, and efficient mining. Due to the high-intensity mining of the fully mechanized mining face, the joint position between the working face and the mining roadway, that is, the two ends of the working face, there is a stress concentration distribution at the sharp corner and the mining roadway is under the influence of the advanced bearing pressure for a long time, resulting in harsh support conditions and poor working environment. Bad and other defects seriously restrict the process and work efficiency of modern coal mining. [0003] At present, the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/00E21F5/04E21C41/18
CPCE21F17/00E21F5/04E21C41/18
Inventor 王方田邵栋梁
Owner CHINA UNIV OF MINING & TECH
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