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Hydraulic directional roof cutting device

A cutting device and roof technology, applied in mining devices, ground mining, mining equipment and other directions, can solve the problems of easy gas accumulation, pollution of underground environment, large smoke, etc., to achieve less environmental pollution, good roofing effect, and reduced integrity sexual effect

Pending Publication Date: 2021-08-06
SHENHUA SHENDONG COAL GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional fracturing method has certain defects. For example, deep hole blasting requires a large amount of high explosives, and the stress wave during the explosion produces strong stress disturbances on the original rock, changing the stress distribution of the original rock, and easily inducing rock burst accidents.
Moreover, a large amount of smoke is produced when the explosive explodes, polluting the underground environment
In addition, the underground goaf of the coal mine is easy to accumulate gas, and the method of blasting and fracturing with explosives is easy to induce gas explosion

Method used

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  • Hydraulic directional roof cutting device
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Embodiment Construction

[0028] In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, and are not exhaustive of all the embodiments. And in the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.

[0029] Embodiments of the present invention provide a hydraulic directional roof cutting device. Such as figure 1 As shown, the hydraulic directional roof cutting device includes a liquid pipe 1 , a joint 2 and a nozzle 3 . Among them, the liquid pipe 1 is used to communicate with the external high-pressure liquid source (it should be noted that, for example, the working pressure of the high-pressure liquid source can be 5-20Mpa, but the specific pressure ca...

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Abstract

The invention provides a hydraulic directional roof cutting device. The hydraulic directional roof cutting device comprises a liquid pipe, a connector arranged at the downstream end of the liquid pipe in a communicating mode and a nozzle arranged on the connector in a communicating mode, wherein the liquid pipe is connected with an external high-pressure liquid source and conveys high-pressure liquid to the connector, so that the high-pressure liquid is directionally sprayed out from the nozzle. The hydraulic directional roof cutting device adopts hydraulic power to directionally cut a roof, avoids use of strong explosives and a series of problems caused by use of the strong explosives, and has the advantages of high pertinence, less environmental pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety production, and in particular relates to a hydraulic directional roof cutting device. Background technique [0002] Coal is the main energy source in China, therefore, the safe and efficient mining of mines is particularly important. At present, there are many factors affecting the normal production of coal mines, such as gas, water, fire and so on. Among these factors, the problem of strong mine pressure caused by the hard roof is very prominent. With the continuous advancement of the coal mining face in the coal mine, the length of the left roof and the area of ​​the overhanging roof in the goaf are getting larger and larger, and the strength of the coal pillars used to support the roof of the goaf is getting smaller and smaller, and it is easy to form stress concentration, which will last for a long time It is easy to cause accidents such as roof collapse, injury and mine impact acci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/00E21C41/18
CPCE21F17/00E21C41/18
Inventor 陈殿赋翁海龙曾得国原莉娜王宝飞伊永杰武旭日郑维宇石维平
Owner SHENHUA SHENDONG COAL GRP
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