Coal seam drilling exploding extracting and injecting integrated anti-outburst method

A coal seam, drilling and blasting technology, applied in the direction of mining fluid, earthwork drilling, gas discharge, etc., can solve the problems of uncontrollable damage range and direction of high-pressure water, complicated procedures and processes, which need to be investigated and perfected, so as to maintain mine safety Efficient production, enhanced gas drainage effect, enhanced plasticity effect

Active Publication Date: 2018-03-20
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While hydraulic fracturing technology forms cracks and unpressurized coal bodies, it will also form new stress concentration areas, which will cause new obstacles to the safe production of coal mines, and the damage range and direction of high-pressure water are uncontrollable. The effects still need to be investigated and improved; hydraulic punching and deep hole pre-splitting blasting enhance pressure relief and anti-reflection by increasing the diameter of the coal hole section, and increase the pressure relief and anti-reflection enhancement of the coal hole section of the part-through-bed drilling. The pumping effect, the process and process itself are more complicated, and the safety and reliability need to be further improved

Method used

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  • Coal seam drilling exploding extracting and injecting integrated anti-outburst method

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Embodiment 1

[0027] Example 1: Coal seam drilling, blasting, pumping and injection integrated outburst prevention method to cover coal roadway excavation

[0028] The coal seam drilling, blasting, pumping and injection integrated outburst prevention method of the present invention is used for strip gas control in coal roadways and for protecting coal roadway excavation. When excavating the coal roadway 4 in the coal seam 3, a special gas control roadway 1 can be arranged in the coal seam roof rock layer where the coal seam 4 is located. The spatial position of the gas control roadway 1 is determined according to the geological conditions and the lithology of the coal seam 3 roof. The vertical distance from the coal seam 3 where the coal roadway 4 is located is 10-30m. When the lithology hardness of the roof of the coal seam 3 is relatively high and relatively complete, take a small value; otherwise, take a large value. The distance can be increased appropriately.

[0029] From the special...

Embodiment 2

[0031] Example 2: Coal seam drilling, blasting, pumping and injection integrated outburst prevention method to cover coal mining face mining

[0032] The coal seam drilling, blasting, pumping and injection integrated outburst prevention method of the present invention can also be used to control section coal seam gas and to protect the recovery of coal seam working faces. Before the coal seam is recovered, a special roadway 1 for gas control is constructed on the roof or floor of the coal seam, and the integrated drilling, blasting and pumping injection technology is implemented according to the sequence in the first embodiment. The same part is omitted, the difference lies in the difference in the scope of drilling control, and the scope of drilling layout is required to meet the requirements of the national "Coal Mine Safety Regulations", "Regulations on Prevention and Control of Coal and Gas Outburst" and local regulations.

[0033] The spatial position of the special roadw...

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Abstract

The invention discloses a coal seam drilling exploding extracting and injecting integrated anti-outburst method. The method comprises the steps that a specialized roadway for controlling gas is arranged in a coal seam roof or floor rocks, uniformly distributed extraction holes and exploding holes are formed in the coal seam from the specialized roadway for controlling gas, a loose blasting is conducted on coals surround a coal roadway by utilizing the exploding holes, and gas extraction is conducted by connecting the extraction holes with a gas drainage pipeline; when the gas extraction is finished, water injection holes are formed in the positions of the exploding holes and the water injection holes are sleeved with the exploding holes, a water injection is conducted on water injection holes by using the pressure water not exceeding 10 MPa in the coal mine, and the water injection is finished until water cannot be injected into the drilling holes or the water seeps from rocks surroundthe water injection holes. The 'drilling exploding extracting and injecting' integrated technique is capable of increasing the fracture of the coals, reducing the gas content and pressure around thecoal roadway, and improving the water content of the coals, and thereby reducing or even eliminating the risk of coal seam outburst.

Description

technical field [0001] The invention relates to an integrated outburst prevention method of coal seam drilling, blasting, pumping and injection, which can increase coal body fissures, reduce gas content and gas pressure, and increase coal water content, and is especially suitable for reducing the risk of coal and gas outburst in soft outburst coal seams. Background technique [0002] my country is the main coal-producing country in the world, and also one of the most serious coal and gas outburst countries in the world. 95% of its coal production comes from underground mining, while high gas and outburst mine coal production accounts for more than half. Especially when mining operations are carried out in coal seams with outburst risks, when the gas pressure is relatively high and the coal and rock mass is relatively soft and dry, coal and gas outburst accidents are prone to occur, which constitutes a serious threat to the life safety of employees. great harm. [0003] Curr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00E21B43/263
CPCE21B43/263E21F7/00
Inventor 杨威路长征林柏泉王皓林明华
Owner CHINA UNIV OF MINING & TECH
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