An intelligent gas drainage system and method based on double-layer directional long drilling

Abstract

The invention discloses an intelligent gas drainage system and method based on double-layer directional long boreholes, comprising: a coal mine information acquisition module, used to obtain the spatial positioning and excavation engineering plan of cracks in the vertical direction of the coal seam under the coal mine; directional drilling The design module is used to arrange the directional drilling trajectory, drilling layer, opening point and measurement position based on the spatial positioning of the cracks in the coal seam and the mining engineering plan; the directional drilling module is used for directional drilling and recording drilling data , to analyze drilling effects, including drilling tools for drilling and monitoring tools for monitoring drilling data. The invention adopts the technology of long drilling, the single-hole forming distance is long, the effective extraction distance is long, the proportion is high, the drilling trajectory is controllable, and the measurement-while-drilling technology and the helical drilling tool at the bottom of the hole are used to realize manual controlled directional drilling. The holes are arranged in the key layer, and the construction can be bypassed after the drilling encounters the unstable rock formation. The degree of damage to the gas drainage channel after the hole is formed is reduced, and the drainage effect is stable.

Description

technical field [0001] The invention relates to the field of directional drilling, in particular to an intelligent gas drainage system and method based on double-layer directional long drilling. Background technique [0002] With the increase of mine mining depth and the improvement of mechanization, the amount of gas emission continues to increase, especially in high-yield, high-efficiency and high-gas working faces such as fully mechanized top coal caving. Due to the limitation of ventilation capacity and wind speed, it is difficult to reduce the gas gushing from the working face to below the safe value by ventilation alone. Gas drainage is an effective means to prevent and control gas disasters. In recent years, many bureau mines have adopted comprehensive gas drainage technology, which has increased the amount of gas drainage, improved the rate of gas drainage, and prevented or reduced the occurrence of gas accidents. However, when comprehensive gas drainage technology ...

AI Technical Summary

Problems solved by technology

However, when comprehensive gas drainage technology is adopted, it is often necessary to arrange special rock gas drainage lanes, which undoubtedly increases the cost of drainage, and some high-gas working faces do not have gas drainage lanes, so comprehensive drainage technology cannot be implemented

In addition, the existing comprehensive drainage methods mostly use dense short boreholes for gas drainage, the number of boreholes is large and the effective use of boreholes is less, and the procedures and materials such as drilling rig movement, hole sealing, and pipeline layout are relatively large. , The construction time is longer and the cost is higher

[0003] In the existing technology, the common methods of gas control in gobs include special roadway drainage and ordinary high-level drilling method, such as: developing high-level drainage roadways, special tail roadways, etc., but the cost of excavation is high, it cannot be reused, and it increases Coal mining cost; for the well-developed cracks on the roof of the coal seam, ordinary drilling is used to control, and the drilling is arranged in the return airway and along the direction of the coal seam to the range of the roof cracks, which has the advantages of less investment, strong pertinence, and relatively simple operation, but There are deficiencies such as short drilling depth, large engineering volume, uncontrollable trajectory, short drainage time, and poor positioning, which restrict the efficiency of gas drainage and affect the drainage effect

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