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Methane dissolving agent for preventing gas bursting

A technology for gas outburst and dissolving agent, applied in the field of new methane dissolving agent, can solve the problems that the outburst elimination technology operation cannot meet the fast mining, the underground working environment is complicated, and the technical cost of the implementation of the outburst elimination operation is increased, so as to achieve the prevention and control of gas outburst and reduce the cost of gas outburst. Low cost and corrosive effect

Active Publication Date: 2018-05-01
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And this kind of method will undoubtedly increase the technical cost in the implementation of outburst elimination operations; in addition, the underground working environment is complex, affected by the mining operation pressure of all parties and the on-site construction environment, various outburst elimination technical operations may not be able to meet the actual rapid mining requirements

Method used

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  • Methane dissolving agent for preventing gas bursting
  • Methane dissolving agent for preventing gas bursting
  • Methane dissolving agent for preventing gas bursting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: The best ratio of methane solvent to prevent gas outburst

[0017] The methane dissolving agent to prevent gas outburst is mainly composed of 4,5-dimethylnonane, 2,7,10-trimethyldodecane, 2,5-dimethylundecane, and tetradecane. The main factors that affect the solubility of methane in the solvent are selected as follows: A—4,5-dimethylnonane accounts for the volume (%) of the solvent, and B—2,7,10-trimethyldodecane accounts for the solvent. The volume (%) of the solvent, C-2,5-dimethylundecane accounts for the volume (%) of the solvent, D-tetradecane accounts for the volume (%) of the solvent, of which 2,7,10-trimethyl The methane solubility of hexyldodecane is low, and it is used as a constraint variable. The dosage of the other three organic solvents is an independent variable, and each factor takes five levels, as shown in Table 1.

[0018] Table 1 Influencing factors and factor levels of the solubility of methane in solvents

[0019]

[0020] According to Table...

Embodiment 2

[0036] A certain amount of methane dissolving agent is selected and dissolved in tetrahydrofuran (20 mL) and mixed evenly with the coal sample. The tetrahydrofuran is easy to volatilize. After volatilization, the methane dissolving agent can be uniformly absorbed in the coal sample. This experiment is equipped with 4 sets of experiments, using the high-pressure volumetric method (MTT 752-1997), at a constant temperature of 30 ℃, carried out the raw coal, the control coal sample (referred to as coal containing solvent) isotherm adsorption experiment, the adsorption isotherm curve (The volume is the volume of the gas in the standard state. The unit mass coal sample refers to the unit combustible base content. In this article, cm is used. 3 / g means) the result is figure 2 Shown.

[0037] Experimental comparison materials and matching ratio Table 5:

[0038] Table 5 Comparison of test materials and proportioning methods

[0039]

[0040] by figure 1 It can be seen that in the low pres...

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Abstract

The invention discloses a methane dissolving agent for preventing gas bursting. The invention provides a novel method for preventing and controlling coal mine gas bursting. The methane dissolving agent is prepared from the following materials in percentage by volume: 30 to 35 percent of 4,5-dimethylnonane, 10 to 25 percent of 2,7,10-trimethyldodecane, 25 to 30 percent of 2,5-dimethylundecane and 20 to 25 percent of tetradecane. The dissolving agent provided by the invention has the good methane dissolving effect; the methane dissolving rate reaches 25 percent or higher; the formula is simple;the technical process and operation are convenient; ingredients are independent; the solution corrosion effect is small; the methane dissolving agent belongs to the methane dissolving agent for preventing gas bursting with low cost and high performance; the coal mine underground gas bursting can be prevented; the good effect is achieved on realization of safe production.

Description

Technical field: [0001] The invention relates to a novel methane dissolving agent for preventing gas outburst in coal mines, which has high solubility to methane and can effectively reduce the gas concentration in underground coal seams. Background technique: [0002] Coal and gas outbursts have always been one of the major disasters in my country's coal mines. According to statistics, more than 70% of major coal mine accidents in my country are gas accidents, and the death toll accounts for about 40% of the total death toll in coal mine accidents. The loss caused by gas outburst is huge, and the coal outburst elimination technology needs to be studied urgently. At present, the domestic and foreign technical methods for gas outburst elimination are relatively single, and they have failed to truly realize the practical needs of low energy, high efficiency, safety and environmental protection. All existing outburst elimination technologies use physical methods to increase the per...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/1487B01D53/1493B01D2252/205B01D2252/40B01D2257/7025Y02C20/20
Inventor 张英华刘佳高玉坤黄志安王辉唐韬白智明
Owner UNIV OF SCI & TECH BEIJING
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