Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Outburst coal seam floor pitch-up through-bed directional hole leading area shield coal roadway driving method

A technology of protruding coal seams and directional holes, applied in earthwork drilling, gas discharge, safety devices, etc., can solve the problems of restricting coal mining speed, large number of construction drilling holes, and short detection distance, so as to ensure safe and efficient operation, The effect of reducing the amount of geophysical engineering and shortening the construction period

Active Publication Date: 2016-08-31
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
View PDF9 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented design allows for better detection and extraction of gases from underground areas without requiring expensive equipment or human labor.

Problems solved by technology

This patented describes various techniques that have been developed over time by companies involved in producing energy from an explosion or accident involving highly dangerous materials such as coal deposits. These issues include gas accumulation during tunnel digging due to poor air quality conditions caused by rapid changes between normal pressure and low pressures within the surrounding environment (excluding rain), limited accessibility when accessing areas near existing roads, difficulty in detecting emergency situations, and difficulties associated with constructing temporary structures around these locations. Current solutions involve either slowdown workface operations or expensive equipment installation costs. Therefore, there exists a challenge towards developing efficient and effective ways to improve the efficiency and effectiveness of gas extraction processes while minimizing environmental impact on workers who use them.

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
  • Outburst coal seam floor pitch-up through-bed directional hole leading area shield coal roadway driving method
  • Outburst coal seam floor pitch-up through-bed directional hole leading area shield coal roadway driving method
  • Outburst coal seam floor pitch-up through-bed directional hole leading area shield coal roadway driving method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] see Figure 1 to Figure 3 , showing the method for tunneling the coal roadway in the advanced area of ​​the overhanging layer directional hole on the floor of the outburst coal seam of the present invention.

[0030] The tunneling method for protecting the coal roadway in the advanced area of ​​the upward penetration layer directional hole on the floor of the outburst coal seam includes the following steps:

[0031] Step 1: Prepare a plurality of drilling sites 4 in the bottom roadway 3 below the side of the coal seam 1 to be excavated. Optionally, the direction of the bottom roadway 3 is the same as that of the coal roadway 2 to be excavated. In the stable coal stratum with a vertical distance of 10-20m from the bottom plate of the coal mining roadway 2, its height changes with the undulation of the coal seam 1, and the relative balance between the two is kept. The length of the bottom roadway 3 is equal to the length of the coal mining roadway 2 minus the floor plate ...

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

PropertyMeasurementUnit
Wall thicknessaaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides an outburst coal seam floor pitch-up through-bed directional hole leading area shield coal roadway driving method. The method comprises the steps that 1, a plurality of drill sites are prepared in a bottom roadway below a coal roadway to be excavated of a working coal seam; 2, change conditions of a coal seam and conditions of hidden geologic anomalous bodies in an influence area of the coal roadway to be excavated are ascertained through pitch-up through-bed directional holes of construction floors of the drill sites, a gas extraction pipe is mounted to pre-exhaust gas in the coal seam in advance, an airtight sampling device is used for conducting sampling inspection on the gas extraction effect, and if the residual gas content of the coal seam is less than or equal to 8 m<3>/t or the gas pressure of the coal seam is less than or equal to 0.74 MPa, extraction is stopped; and 3, coal roadway driving is carried out according to the ascertained change conditions of the coal seam and the ascertained conditions of the hidden geologic anomalous bodies. Thus, the work quantity of geophysical exploration, the drilling work quantity and the work quantity of bed plate tunnel driving in the prior art are reduced, the construction cycle, the exploration cycle and the gas extraction standard control cycle are shortened, and it is guaranteed that outburst coal seam coal roadway driving is carried out safely and efficiently.

Description

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

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
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products