Hydraulic flushing and presplit blasting combined permeability-increasing extraction system in crossing holes

A technology of hydraulic punching and pre-splitting blasting, which is applied in the direction of earth drilling, mining fluid, mining equipment, etc., which can solve the problems of large amount of drilling construction, small effective range of influence, and complicated construction procedures, so as to reduce blank areas , improve air permeability and reduce blockage

Active Publication Date: 2016-04-20
HENAN POLYTECHNIC UNIV
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  • Abstract
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Problems solved by technology

However, most of these single methods have problems such as large amount of drilling construction, complex construction procedures, high engineering investment, small effective range of influence, and long extraction time. The effective influence range of holes can be improved to improve the gas drainage effect of this coal seam

Method used

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  • Hydraulic flushing and presplit blasting combined permeability-increasing extraction system in crossing holes
  • Hydraulic flushing and presplit blasting combined permeability-increasing extraction system in crossing holes
  • Hydraulic flushing and presplit blasting combined permeability-increasing extraction system in crossing holes

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Embodiment Construction

[0021] Such as Figure 1-5 As shown, the hydraulic punching and pre-splitting blasting combined anti-reflection drainage system in the interlayer drilling of the present invention includes a hydraulic punching device, a pre-splitting blasting device and a gas drainage device; the top of the drainage lane 80 is from bottom to top The coal seam floor 81, the coal reservoir 82 and the coal seam roof 83 are successively, and some blasting boreholes 9 and punching boreholes 5 are alternately arranged on the coal seam floor 81; the distance between the blasting boreholes 9 and the adjacent punching boreholes 5 is 3-6m, the working end of the hydraulic punching device extends into the punching hole 5, and the working end of the pre-splitting blasting device extends into the blasting hole 9; after the punching hole 5 is punched and the blasting hole 9 After blasting, the extraction end of the gas extraction device extends into the punching hole 5 and the blasting hole 9;

[0022] The...

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Abstract

A hydraulic flushing and presplit blasting combined permeability-increasing extraction system in crossing holes comprises a hydraulic flushing device, a presplit blasting device, a gas extraction device and extraction pipelines. The hydraulic flushing device comprises a sounding borer, a drill rod, a high-pressure water-injection pump and a water gas separator, the upper end of the drill rod serves as a water outlet, the lower end of the drill rod serves as a water inlet, a water outlet of the high-pressure water-injection pump is connected with the water inlet of the drill rod, the lower end of the drill rod is connected with the power output end of the sounding borer, the upper end of the drill rod extends into a flushing drill hole, and a gas dust collecting device is arranged at the flushing drill hole position and is connected with an inlet of the water gas separator through a pipeline. The hydraulic flushing and presplit blasting combined permeability-increasing extraction system in the crossing holes has the advantages that coal seam gas permeability is improved effectively, gas extraction effects are enhanced, extraction time is shortened effectively and potential safety hazards of gas are reduced maximally.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and in particular relates to an anti-reflection drainage system combined with hydraulic punching and pre-splitting blasting in drilled holes. Background technique [0002] my country's energy resources have the characteristics of "rich coal, poor oil, and little gas". In the energy industry structure, according to the report of BP British Petroleum Company, my country's energy consumption structure continued to improve in 2013, and coal consumption accounted for 67.5% of the total primary energy consumption, a record low, but nearly 40 percentage points higher than the world's current average level . Therefore, for a long time to come, coal will still be the main energy source in our country, and ensuring the safe production of coal mines is an important guarantee for the sustainable development of the national economy. Since 95% of domestic coal mining is underground operations, the coal se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/263E21B7/18E21F7/00
CPCE21B7/18E21B43/263E21F7/00
Inventor 杨明高建良贾智伟王晓楠张学博张艳利
Owner HENAN POLYTECHNIC UNIV
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