Mechanical rock breaking method for coal mine rock roadway

A rock roadway and rock breaking technology, which is applied in the field of mechanical rock breaking in coal mine rock roadways, can solve the problems of difficult removal of gun smoke, difficult crushing, and low operating efficiency, so as to reduce the difficulty of rock breaking by impact, save manpower and material resources, and improve work efficiency Effect

Inactive Publication Date: 2018-12-18
CHINA UNIV OF MINING & TECH (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many steps in the construction process of the drill and blast method, which are sequentially connected, and irreversible losses will occur if there is a slight carelessness. The construction process requires high caution and professionalism of the unit operators; The smoke is difficult to remove in a short period of time, which is harmful to the staff and can easily induce occupational diseases; and with the increase of the depth of coal mining, the risk factor of underground rock roadway excavation continues to increase
[0005] As for the mechanical rock breaking method, the rock surface is mainly broken by reciprocating impact equipment such as a breaker, usually with a skilled production team leader as the driver; for the hard rock environment, the face of the roadway is a complete section, directly used Breaking hammers are difficult to break; in this case, the driver's operation process is usually dominated by experience, so it is easy to cause difficulties in opening the whole rock and low operating efficiency

Method used

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  • Mechanical rock breaking method for coal mine rock roadway
  • Mechanical rock breaking method for coal mine rock roadway
  • Mechanical rock breaking method for coal mine rock roadway

Examples

Experimental program
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Effect test

Embodiment 1

[0044] On the basis of the foregoing, in this embodiment, as figure 2As shown, the holes 3 in the drilling area 2 are distributed in rows, and the distance between adjacent holes 3 in the same row is 3-5 times the diameter of the holes 3 . According to the depth of the hole 3 and the hardness of the rock, if the distance between the holes 3 is selected, the crack at one impact point can extend to multiple holes 3 at the same time, thereby reducing the impact point of the breaking hammer and improving the rock breaking efficiency in the drilling area 2 . In this way, when the two sides of the opening 3 are impacted, the rocks around the opening 3 begin to break, thereby forming a long depression in the area where the entire row of openings 3 is located, which is convenient for further rock-breaking operations in the later stage.

[0045] Optionally, the holes 3 in the drilling area 2 are arranged in multiple rows, and the distance between the holes 3 in two adjacent rows is 1-...

Embodiment 2

[0049] Such as Figure 4 As shown, this embodiment is basically the same as Embodiment 1, the only difference is that the openings 3 in the drilling area 2 are set in one circle or multiple circles nested in each other, and the openings 3 are adjacent in the same circle. The pitch is 3-5 times of the diameter of the opening 3 . This kind of implementation is generally arranged on one side or the middle of the palm surface 1, and a circle of openings 3 is set, and the inner and outer sides of the circle are respectively impacted. The crack can extend from the impact point to the nearby opening 3, thereby closing the opening. 3 The rocks on both sides were broken to form a ring-shaped depression, and then excavated to the inside and outside respectively. The spacing of the openings 3 in the same circle can also be flexibly selected. If the distance between the openings 3 is too close, the openings 3 will be wasted. If the distance between the openings 3 is too far, more impact ...

Embodiment 3

[0052] Such as Figure 5 As shown, this embodiment is basically the same as Embodiment 1 or Embodiment 2, the only difference is that the drilling area 2 is in the middle of the face 1, and the openings 3 in the drilling area 2 are arranged at intervals along the same helical line , the distance between adjacent holes 3 distributed along the helix is ​​3-5 times the diameter of the holes 3 . When crushing, it can be impacted along a certain distance on both sides of the helix. The distance of the opening 3 is 3-5 times the diameter of the opening 3. Within this range, a crack at one impact point can extend to two adjacent openings at the same time. 3. The efficiency of rock breaking is high; a depression is formed along the spiral line, and the rock between the spiral lines is cleaned to form a complete circular depression area, which is then used as the center to advance around.

[0053] In some embodiments, the distance between two adjacent turns of the helix is ​​1-3 times...

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Abstract

The invention relates to the technical field of coal mine rock roadway excavation, in particular to a mechanical rock breaking method for a coal mine rock roadway. The method includes the following steps that S1, at least one drilling region and the location of each hole are selected on the excavating face of the roadway; S2, drilling operation is performed in the drilling region so as to form a new free face in rock; S3, impact type rock breaking operation is conducted on rock in the drilling region so as to form a sunken region; S4, by using the sunken region as a starting point, impact typerock breaking operation is conducted outward gradually to the edge of the excavating face. By means of pre-opening, the free face of rock mass is increased, the integrity of the rock mass is destroyed, the difficulty of impact type rock breaking is reduced, and the speed of roadway excavation is greatly increased; the drilling operation is completed by mechanical equipment, the operation speed ishigh, the work efficiency is improved, and labor and material resources are effectively saved.

Description

technical field [0001] The application relates to the technical field of coal mine rock roadway excavation, in particular to a mechanical rock breaking method for coal mine rock roadway. Background technique [0002] Underground rock roadway excavation is an important part of the underground coal mining process. The mechanical rock-breaking method, which uses hydraulic pressure as power, mechanizes the operation process, reduces manual operations, and improves operation efficiency, is gradually being used in underground engineering, shafts, coal mines and other fields. [0003] Nowadays, rock breaking methods in coal mine rock roadways mainly include drilling and blasting and mechanical rock breaking. Drilling and blasting construction includes blasting hole layout, drilling, charging, blasting, rock loading and transportation, and support work. This method includes smooth blasting and blasting. Pre-splitting blasting accounts for a large part of the current tunneling opera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D9/10
CPCE21D9/00E21D9/10
Inventor 岳中文宋晨哲王相元赵伟晋铭赵旭峰宋晨光
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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