Dirt band-containing coal seam working surface mining process

A technology of working face and coal seam, which is applied in ground mining, mining equipment, earthwork drilling and mining, etc., and can solve problems such as threats to safe mining at the working face, damage to shearer cutters, and affecting production at the working face

Inactive Publication Date: 2012-11-21
新汶矿业集团有限责任公司协庄煤矿
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the mechanized mining of coal mines, coal seams with complex structures are often encountered, and the working face contains gangue with a hardness coefficient of F=8 with a thickness of about 0.2-0.5m. Large sparks and coal dust, the coal dust explosion index is 45.78%, which is very explosive, so it poses a certain threat to the safe mining of the working face, and also affects the output 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
  • Dirt band-containing coal seam working surface mining process
  • Dirt band-containing coal seam working surface mining process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] The invention discloses a coal mining process method in a gangue coal seam working face. Before mining by a shearer, firstly, a cut hole 2 is drilled into the coal seam every a=50-80 meters in the roadway 1 of the mining area, and then every cut hole 2 is made in the cut hole 2 Blast hole 3 is drilled horizontally to both sides of cut hole 2 at intervals of b=8 meters. The diameter of blast hole 3 is 42 mm. The depth of blast hole 3 is c=30 meters and d=40 meters. The two kinds of blast holes are arranged at intervals. All the blasting holes 3 are loaded with water-gel explosives 4 permitted by coal mines, the diameter of the charge roll is Φ32mm, and 1500g of charge is continuously charged at intervals of 10 meters from the bottom of the hole, and the gun head 5 of each charge section uses a section number of milliseconds to delay detonation Tube 6, all the blast holes 3 in each cutout 2 adopt millisecond delay detonator tubes 5 with different segment numbers, and the d...

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 dirt band-containing coal seam working surface mining process, which includes the steps of: before a coal mining machine starts mining, drilling a cut in the coal seam in a roadway in the mining area; drilling blast holes towards the two sides of the cut in the horizontal direction in the cut; filling mining explosives in the blast holes, connecting cartridge igniters and detonating at one time outside the blast holes; generating grinding ring zones with diameter of 100-250mm around the blast holes after detonation and generating a run-through fracture zone and a secondary fracture ring zone in the direction of a connecting line between the blast holes; and injecting water to the coal seam by drilling holes to further expand the fractures. The advance presplit blasting technology which is a new type of coal face blasting technology is particularly suitable for the coal faces of the coal seams with high hardness or with high hard dirt bands. After water is injected, the dust concentration of the working surface is reduced, so safe mining on the working face is ensured.

Description

technical field [0001] The invention relates to the technical field of coal mining. Background technique [0002] In the mechanized mining of coal mines, coal seams with complex structures are often encountered, and the working face contains gangue with a hardness coefficient of F=8 with a thickness of about 0.2-0.5m. Large sparks and coal dust, the coal dust explosion index is 45.78%, which is very explosive, so it poses a certain threat to the safe mining of the working face, and also affects the output of the working face. Contents of the invention [0003] In order to solve the above-mentioned problems, the present invention proposes a coal mining process in the working face of the gangue coal seam to ensure the safe mining of the working face. [0004] The technical solution is a coal mining process in a gangue coal seam working face, which is characterized in that before the mining of the coal shearer, firstly cut holes in the coal seam every 50-80 meters in the roa...

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): E21C41/16F42D3/00E21F5/02
Inventor 张京泉
Owner 新汶矿业集团有限责任公司协庄煤矿
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap