Novel process for abandoned mine downhole gas control

A new process, gas technology, applied in gas discharge, mining equipment, mining equipment, etc., to achieve good economic and environmental benefits

Active Publication Date: 2017-08-11
CECEP NINGXIA NEW ENERGY RESOURCES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies in the existing abandoned coal mine gas treatment, and provide a roadway blockage, reserved holes, gas pumping and drainage pipeline system conne

Method used

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  • Novel process for abandoned mine downhole gas control
  • Novel process for abandoned mine downhole gas control
  • Novel process for abandoned mine downhole gas control

Examples

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Example Embodiment

[0021] Such as figure 1 As shown, a new technology for controlling gas in an abandoned mine underground. Before the abandoned coal mine is about to be closed, it is about 8 meters inward from the openings of the sub-roadways 1, 2, and 3 in the underground mining area and the work area of ​​the abandoned mine. Respectively build blocking walls4. The specific method is to build a sealing wall with stone and cement mortar at 8 meters in the sub-roadway, with a thickness of about 0.8-1 meters, block the roadway, fill and compact with loess in the middle, with a thickness of 5 meters, and then outside Then build a wall of material stone and cement mortar, with a thickness of about 0.8-1 meters. During the entire process of building the closed wall, one DN100-DN200 thick wall should be pre-embedded at 0.2-0.3 meters from the top of the tunnel Pre-buried pipeline 5, through this pre-buried pipe 5 to make the sub-roadway and the main roadway 8 air flow, on the outside of this pre-burie...

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Abstract

The invention provides a novel process for abandoned mine downhole gas control. The novel process comprises the steps that (1) before an abandoned coal mine is closed, downhole branched roadways are blocked, and steel pipe holes are reserved in the upper portions of blocking walls to enable the interior to communicate with the exterior; (2) the reserved steel pipe holes of the multiple downhole branched roadway blocking walls are connected with a downhole gas pumping and discharging main system to conduct gas pumping and discharging; (3) blocked roadway drainage water communicates with main roadway drainage water, a water storage bin is built at a low downhole position, a water suction pump and a water pipe are mounted to pump and drain downhole gushing water to the ground, and the normal pumping and drainage effect of the downhole gushing water can be achieved after the coal mine is closed; (4) a main pithead and a vice pithead of the abandoned mine are closed, a footrill and an inclined shaft are filled with laying material rock walls and loess, steel pipes are embedded into the footrill and the inclined shaft, a main pithead and a vice pithead of a vertical shaft are blocked through reinforced concrete cover plates, and meanwhile, steel pipes are embedded into the main pithead and the vice pithead of the vertical shaft to enable the interiors of the pitheads to communicate with the exteriors of the pitheads; and (5) downhole gas is discharged and extracted through ground gas discharging and extraction equipment. The novel process can achieve the purposes of abandoned mine downhole gas comprehensive control and utilization.

Description

technical field [0001] The invention belongs to the field of mine gas control, and in particular relates to a new process technology of abandoned mine gas control. Background technique [0002] Abandoned coal mine gas refers to the methane resources in the remaining coal seams, surrounding rocks and underground confined spaces that remain in the remaining coal seams, surrounding rocks and underground confined spaces in mines that are closed due to the depletion of coal resources or other non-compliance with safety production requirements and policy reasons. The development and utilization of abandoned mine gas is to take certain sealing measures before the coal mine is about to be closed, and use the original gas drainage system to extract gas from the ground for utilization. Domestically, there are only some theoretical researches on abandoned mine treatment technology, and there is no successful experience or project at present. Although some mining areas have carried out...

Claims

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Application Information

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IPC IPC(8): E21F7/00E21F17/103E21F16/00
CPCE21F7/00E21F16/00E21F17/103
Inventor 于志军刘双林杨立新薛江云任育杰祁铭赵彦向其芝杨智彬
Owner CECEP NINGXIA NEW ENERGY RESOURCES LTD
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