Method for solving coal seam gas outburst

Abstract

The invention discloses a method for solving coal seam gas outburst, and relates to the technical field of coal mining. According to the method for solving coal seam gas outburst, a drainage hole is drilled, a fracturing pipe is arranged in the drainage hole to fracture the drainage hole, and the drainage hole is connected with a drainage pipe to drain gas after fracturing is completed. Gas drainage can be completed in a trouble-saving and labor-saving manner, and the gas drainage effect is good and controllable.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a method for solving coal seam gas outburst. Background technique [0002] In the process of coal mining, especially in gas outburst mines, if the gas problem is not properly dealt with, once a gas accident occurs, it will lead to mass casualties and serious accidents. The existing methods for solving coal seam gas outburst mainly have the following defects: [0003] 1. The existing treatment method uses drilling to drain the gas. This method takes a long time to pump the gas, and the gas attenuation is slow, so it is difficult to ensure safe production; [0004] 2. It is time-consuming and labor-intensive to create holes for gas extraction by hydraulic punching, the process is complicated, and the effect is poor; [0005] 3. The hydraulic fracturing method is used to extract gas. During the hydraulic fracturing process, the trajectory generated cannot be controlled and the...

AI Technical Summary

Problems solved by technology

[0009] The invention provides a method for solving coal seam gas outburst, which includes the following steps: solving the problem of coal gas outburst in Shimen, when the distance between the head of the Shimen construction and the minimum normal distance of the coal seam is not less than 10 meters, stop the excavation work and start drilling for The pressure measuring hole for measuring the gas pressure. The pressure measuring hole shall be sealed immediately after the construction is completed, and the detection instrument for detecting the gas pressure shall be installed. It is required to drill the first drainage hole, and install the first cracking tube in the first drainage hole according to the design requirements, and then crack the first drainage hole through the first cracking tube. After the fracturing of the first drainage hole is completed, the first drainage pipe is installed to drain the gas; the transportation chute and the return air chute are divided into multiple sections along their respective excavation directions, and the problem of gas outburst in coal roadway excavation is solved in sections. When solving the problem of gas outburst in each section of the coal roadway, along the direction of the coal seam, according to the construction measures of the transportation chute and the return air chute, the excavation working faces of the transportation chute and the return air chute are respectively Drilling the second drainage hole and the third drainage hole, the second drainage hole and the third drainage hole are respectively 60-100 meters ahead of the tunneling face of the transport chute and the return air chute After the construction of the second drainage hole and the third drainage hole is completed, install the second cracking pipe and the third drainage hole respectively in the second drainage hole and the third drainage hole according to the design requirements. Three cracking tubes, and then through the second cracking tube and the third cracking tube to crack the second drainage hole and the third drainage hole respectively, the second drainage hole and the third drainage hole After the fracturing of the third drainage hole is completed, a second drainage pipe and a third drainage pipe are respectively installed in the second drainage hole and the third drainage hole to drain the gas; To solve the problem of gas outburst in the coal mining face, when the length of the coal mining face is 200-300 meters, when the transport chute and the return air chute are opposite to each other along the direction of the coal seam inclination Four drainage holes and the fifth drainage hole, after the construction of the fourth drainage hole and the fifth drainage hole, according to the design requirements in the fourth drainage hole and the fifth drainage hole The fourth cracking tube and the fifth cracking tube are respectively installed inside, and then the fourth drainage hole and the fifth drainage hole are respectively cracked through the fourth cracking tube and the fifth cracking tube , after the fracturing of the fourth drainage hole and the fifth drainage hole is completed, a fourth drainage pipe and a fourth drainage pipe and the fifth drainage hole are respectively installed in the fourth drainage hole and the fifth drainage hole. Five drainage pipes to drain the gas, when the length of the coal mining face is less than 200 meters, the fourth drainage is only carried out along the coal seam inclination along the transport chute to the return air chute hole, after the construction of the fourth drainage hole is completed, a fourth cracking pipe is installed in the fourth drainage hole, and then the fourth drainage hole is cracked through the fourth cracking tube, the After the fracturing of the fourth drainage hole is completed, a fourth drainage pipe is installed in the fourth drainage hole to drain the gas

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