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Coal roadway advanced area pre-extraction method based on directional extraction drilling cross-roadway arrangement

A technology for drainage drilling and roadway layout, which is applied in drilling equipment and methods, directional drilling, and production of fluids, etc., can solve the problems of large drilling attenuation coefficient, unbalanced gushing, and long drainage time to meet the standard. The effect of relieving gas control pressure, preventing abnormal gas gushing, and improving drilling utilization rate

Inactive Publication Date: 2020-10-13
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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Problems solved by technology

However, due to the high mining intensity, concentrated production, and fast advancing speed, the gas gushing out of the mining face is concentrated and unbalanced, which poses a great threat to safe production and seriously restricts the advantages of high-yield and efficient working faces.
In addition, due to the influence of gas geological conditions, the gas permeability of coal seams in my country is generally low, the attenuation coefficient of boreholes is large, and it takes a long time for drainage to reach the standard, and the succession of "pumping, digging, and mining" in mines is prone to imbalance

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  • Coal roadway advanced area pre-extraction method based on directional extraction drilling cross-roadway arrangement
  • Coal roadway advanced area pre-extraction method based on directional extraction drilling cross-roadway arrangement

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Embodiment Construction

[0026] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0027] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention belongs to the field of coal mine safety, and relates to a coal roadway advanced area pre-extraction method based on directional extraction drilling cross-roadway arrangement. The coal roadway advanced area pre-extraction method based on directional extraction drilling cross-roadway arrangement utilizes a directional drilling construction technology to realize the regional pre-extraction of coal seam gas in a coal roadway excavation area in advance, does not destroy the drilling extraction function during roadway excavation, can achieve the purposes of continuous and efficient extraction and multiple purposes of one hole, can effectively alleviate the situation of tight mine 'extraction and excavation' and improve the utilization rate of extraction drilling, has significant economic benefits, and is particularly suitable for single coal seam mining or high gas and outburst mines without special gas extraction roadways.

Description

technical field [0001] The invention belongs to the field of coal mine safety, and relates to a method for pre-extraction in the advanced area of ​​coal roadways based on the arrangement of directional drainage boreholes across roadways. Background technique [0002] Gas accident is one of the important disasters in coal mines, and gas drainage is an important measure to prevent and control gas disasters. Underground bedding gas drainage is the most commonly used technical means in high gas mines, but the layout of coal seam bedding drainage boreholes has an important impact on the gas drainage effect. With the development of horizontal directional drilling technology in China, directional drainage drilling accounts for an increasing proportion of coal mine gas drainage, especially in high-yield and efficient modern high-outburst mines. Directional drainage drilling provides multiple possibilities for mine gas drainage schemes, and lays the foundation for gas drainage metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00E21B43/00E21B43/30E21B7/04
CPCE21B7/046E21B43/006E21B43/305E21F7/00
Inventor 孙炳兴杨俊哲王振张永福程建圣陈殿赋黄光利罗伙根向衍斌李健威聂海洋孟范喻马智勇王洋李大勇王波
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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