A new process for underground gas control in abandoned mines

A new technology, gas technology, applied in the direction of gas discharge, mining equipment, mining equipment, etc., can solve the problems of abandoned mine gas comprehensive treatment and utilization industrialization blank, achieve good environmental benefits and realize the effect of economic benefits

Active Publication Date: 2018-04-10
CECEP NINGXIA NEW ENERGY RESOURCES LTD
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Problems solved by technology

Although some mining areas have carried out ground drilling and drainage and utilization, the industrialization of comprehensive treatment and utilization of abandoned mine gas in the true sense is still blank

Method used

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  • A new process for underground gas control in abandoned mines
  • A new process for underground gas control in abandoned mines
  • A new process for underground gas control in abandoned mines

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Embodiment Construction

[0021] Such as figure 1 As shown in Fig. 1, a new technology for underground gas control in abandoned mines. Before the abandoned mines are about to be closed, in the underground mining area of ​​the abandoned mines and the working area of ​​the goaf, the openings of roadways 1, 2, and 3 are about 8 meters inward. Build the sealing wall 4 respectively. The specific method is to build a sealing wall with material stones and cement mortar at a distance of 8 meters inside the sub-tunnel, with a thickness of about 0.8-1 meters, block the lane, fill and compact it with loess in the middle, with a thickness of 5 meters, and then place it on the outside. Then build a sealing wall with stone and cement mortar, with a thickness of about 0.8-1 meter. During the entire process of building the sealing wall, a DN100-DN200 thick slab should be embedded at a distance of 0.2-0.3 meters from the top of the tunnel on the sealing wall. Pre-buried pipeline 5, through this pre-buried pipeline 5, ...

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Abstract

A new process for underground gas control in abandoned mines: the process steps are: 1) block the underground sub-tunnels before the abandoned mines are closed, and reserve steel pipe holes on the top of the blocked material stone wall to connect the inside and outside; 2) The reserved steel pipe holes on the sealing wall of multiple underground sub-tunnels are connected with the underground gas drainage main pipeline system for gas drainage; 3) The drainage of the blocked lanes is connected with the drainage of the main roadway, and a storage tank is built at the lower position of the underground. Water tank, install pumps and water pipes to pump the underground water to the ground, so as to achieve the effect of normal pumping and drainage of underground water after the coal mine is closed; 4) Close the main and auxiliary wellheads of abandoned mines, and use masonry materials Stone walls and loess-filled pre-embedded steel pipes are used to block the main and auxiliary wellheads in the form of reinforced concrete cover plates for shafts, and at the same time, pre-embedded steel pipes connect the inside and outside of the wellheads; 5) Underground gas drainage is carried out through ground gas drainage equipment. The invention can achieve the purpose of comprehensive treatment and utilization of underground gas in abandoned mines.

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 mine gas refers to methane resources that remain in the remaining coal seams, surrounding rocks, and underground confined spaces in the 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 means that before the mine is about to be closed, certain sealing measures are taken, and the original gas drainage system is used to extract the gas from the ground. 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 ground drilling and drainage and utilization, the industrialization of comprehensive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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