Unlock instant, AI-driven research and patent intelligence for your innovation.

Coal mine fully mechanized coal mining face roof treatment method

A fully mechanized mining face and working face technology, which is applied to mine roof support, ground mining, mining equipment, etc., can solve problems affecting the advancement of the working face, etc.

Active Publication Date: 2021-07-13
HUAINAN MINING IND GRP
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: how to solve the problem that the coal mine working face roof management problem seriously affects the advancing degree of the working face

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coal mine fully mechanized coal mining face roof treatment method
  • Coal mine fully mechanized coal mining face roof treatment method
  • Coal mine fully mechanized coal mining face roof treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for controlling the roof of a coal mine fully mechanized mining face, comprising the following steps:

[0041] S1. Implement in-plane deep hole pre-splitting blasting to relieve pressure:

[0042] 1. Research on the height of the "three belts"

[0043] (1) Analysis of exploration holes along the airside

[0044] On the 1412A working face, Yunshun designed and implemented goaf exploration holes along the airside to obtain the "three zones" law of the goaf, as shown in figure 1 shown;

[0045] a. The contour line of fracture zone development

[0046] According to the moving and breaking law of overlying rock in the stope and the "three-zone theory" of rock pressure, it is believed that the fracture zone is developed at a height of 38m;

[0047] b. Linear Fitting Line

[0048] Linear fitting is performed on the average value of the data to obtain a linear fitting line, and the angle between it and the horizontal line is considered to be the roof collapse angl...

Embodiment 2

[0095] The difference between this embodiment and the above-mentioned embodiment is that this embodiment implements artificial false roof protection made of filling materials. In March 2019, the working surface started to erect the shed again, but the height of the roof falling near the 35# and 69# frames on the working surface is high , the distance between the sides is long, which seriously threatens the personal safety of construction workers, so 301 filling material is used for the first time;

[0096] It has been used successively during the scaffolding period and when a large number of people are required to enter the side of the coal wall, such as manual unloading. First, it fills the cracks between part of the gangue, so that the broken gangue forms a whole, reducing the workload of the top connection. Security threats during scaffolding.

Embodiment 3

[0098] The difference between this embodiment and the above-mentioned embodiments is that this embodiment forms a management concept of detailed control and rapid advancement, adheres to the new concept of "quality first, quality guarantees progress", puts quality management at the core position, and takes mining height control as a The top priority of daily management; the foundation of rapid advancement lies in all-round equipment reliability guarantee and overall optimization of labor organization.

[0099] 1. Detailed control

[0100](1) Specification quality control

[0101] "Three straight, two flat, one clean and two smooth" means that the support is straight, the chain conveyor is straight, the coal wall is straight, the top and bottom plates are flat, the floating coal sundries are clean, and the upper and lower outlets are unblocked. The eight requirements are to be adhered to and strictly implemented by the fully mechanized mining team in daily management, especial...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a coal mine fully mechanized coal mining face roof treatment method. The method comprises the following steps of S1, implementing in-plane deep hole presplitting blasting pressure relief; S2, implementing presplitting blasting roof cutting of gob-side roadways; S3, injecting water into bedding holes of the two roadways; S4, grouting reinforcement of a shallow roof; S5, introducing an automatic pressure supplementing system; S6, implementing manual roof ripping to ensure that a support follows the roof in time; S7, constructing a hollow grouting anchor cable advanced management roof and constructing an advanced shield chamber; and S8, reinforcing the coal wall. According to the method, the periodic weighting step pitch and weighting strength are reduced through in-plane deep hole presplitting blasting; a gob-side roadway presplitting blasting pressure relief test is implemented, and the problems of insufficient pedestrian space, difficulty in pulling and moving of the end support and a reversed loader in the advanced supporting section of a transportation gateway are effectively solved; the automatic pressure supplementing system has the support working condition online monitoring and continuous pressure maintaining functions, and the supporting capacity of the support is exerted to the maximum extent; and hollow grouting anchor cables effectively control the shallow easy-separation layer roof in front of the shed erecting range.

Description

technical field [0001] The invention relates to the technical field of coal mine safety production, in particular to a method for treating the roof of a coal mine fully mechanized mining face. Background technique [0002] The mining face equipped with comprehensive mechanized equipment in underground coal mines is fully mechanized mining face. The condition is that the coal mining equipment is a coal shearer, the transportation equipment of the working face is a flexible scraper conveyor, the roof support of the working face is supported by a hydraulic support, and a belt conveyor is equipped along the trough. A coal mine has successfully mined two working faces 1413A and 1611A. However, during the mining process of 1415A and 1412A working faces, it encountered problems in roof management, including soft coal walls and easy slabs, roof bedding development and easy roof drop, and roof fluctuations. , Difficult control of mining height, poor adaptability of support structure...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21D11/10E21D15/44E21D23/16E21D20/02
CPCE21C41/18E21D11/10E21D15/44E21D23/16E21D20/02
Inventor 李佳佳邓秘高敏
Owner HUAINAN MINING IND GRP