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Integrated mining method for commonly mining coal and gas of high mine

A mining method and gas drainage technology, which is applied in the fields of gas discharge, mining equipment, earthwork drilling, etc., and can solve problems such as low permeability, difficult coal seam gas drainage, softness, etc.

Inactive Publication Date: 2012-02-15
HENAN COAL CHEM IND GROUP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The integrated mining method of coal and gas mining in high outburst mines involves the field of mining safety production. Long-diameter boreholes are used to extract coal seam gas, eliminating the risk of coal and gas outburst in different mining periods. At the same time, the mining activities of coal seams strengthen the extraction efficiency of large-diameter long boreholes on the roof, thereby realizing the integration of coal and gas mining

Method used

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  • Integrated mining method for commonly mining coal and gas of high mine
  • Integrated mining method for commonly mining coal and gas of high mine
  • Integrated mining method for commonly mining coal and gas of high mine

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Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 2 , 3 , Shown in 4, a mining method that implements coal and gas co-mining integration in a single, soft, low-permeability coal seam.

[0027] There is such a mining area: there are several working faces 2 in the mining area, the working face is 800m long in direction and 180m long in inclination. The thickness of the coal seam is 6m, and it is an outburst coal seam, which has the characteristics of soft coal quality, poor permeability, high gas content and high pressure in the coal seam. Severe coal seam gas outburst disasters and difficulties in roadway excavation have plagued mine production. In view of these problems, before the layout of the mining area, the gas drainage system is designed, and the coal seam gas is pre-drained by using the long hole 6 on the roof to eliminate outbursts in the area, cover the roadway excavation of the working face, and ensure the safety of mining at the working face.

[0028] The specific implementation steps are ...

Embodiment 2

[0035] Such as Figure 5 , 6 , 7, in a single, soft, low-permeability coal seam, use the existing roadway in the mining area to implement the integrated mining method of coal and gas mining.

[0036] There is such a mining area: there are several working faces 2 in the mining area, the working face is 800m long in direction and 180m long in inclination. The thickness of the coal seam is 6m, and it is an outburst coal seam, which has the characteristics of soft coal quality, poor permeability, high gas content and high pressure in the coal seam. Severe coal seam gas outburst disasters and difficulties in roadway excavation have plagued mine production. There is already a working face in the mining area that goes to the roof roadway 7, and the long drilling hole 8 on the roof roadway 7 can be drilled on the working face inclined to the roof, and the long drilling hole 6 on the working face of the upper (lower) roadway in the mining area is moved to the roof to cover the roadwa...

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Abstract

The invention discloses an integrated mining method for commonly mining coal and gas of a high mine. The integrated mining method comprises the following steps of: adopting a process technology which utilizes ground drilling to drain coal bed gas for carrying out gas drainage on unmined areas, and carrying out coal mining on drainage areas when the safety standard is met; for mined areas, utilizing the space of the existing roadways and gas drainage special preparation roadways under the coal mine or additionally opening large-diameter long drilling holes which have different distances from a drill site to a coal bed top plate; selecting corresponding fracturing pump stations and fracturing process technologies to carry out fracturing treatment, forming a fracture network system communicated with the coal bed in the coal bed top plate to preextract the coal bed gas; when the preextraction meets the safety standard, firstly adopting a tunneling process to tunnel an intake airway and a return airway of a work surface; distributing a stopping work surface, then carrying out construction of the conventional drainage and drilling at the intake airway and the return airway of the work surface; and by utilizing the mine pressure rule caused by the stopping of the work surface, implementing the preextraction before mining and simultaneous mining and extraction with fracturing holes, and realizing integrated mining of the coal and the gas. In the integrated mining method, the safe high-efficiency common mining of the coal and the gas can be realized and the application prospect is wide.

Description

technical field [0001] The invention relates to the field of joint mining of coal and gas, in particular to an integrated mining method for joint mining of coal and gas in high outburst mines. Background technique [0002] my country is the country with the most serious coal and gas outburst disasters in the world. With the increase of mine mining depth, the gas content and gas pressure in coal seams gradually increase. Many low gas mines have transformed into high gas mines and outburst mines, and the outburst disasters It's getting serious. Therefore, the best way to control gas disasters and eliminate coal and gas outbursts is to pre-pump high gas areas. For single, soft, and outburst coal seams, the soft coal seam makes it difficult to drill and form holes, and it is easy to collapse the hole. In addition, the coal seam has poor permeability, and the drainage effect of commonly used drilling holes is very poor, and the outburst danger of the coal seam cannot be eliminate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
Inventor 马耕陶云奇苏现波李伍成王峰丁建础刘三钧杨程涛
Owner HENAN COAL CHEM IND GROUP INST
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