【摘要】：煤炭資源是各個(gè)行業(yè)發(fā)展的基礎(chǔ)能源,自工業(yè)革命以來(lái),為各個(gè)國(guó)家的經(jīng)濟(jì)發(fā)展做貢獻(xiàn)巨大。然而,在世界各個(gè)國(guó)家開(kāi)采煤炭時(shí),由于各種災(zāi)害的發(fā)生,人員傷亡和經(jīng)濟(jì)損失非常大,嚴(yán)重制約經(jīng)濟(jì)的發(fā)展。煤礦H_2S由于其含量較低、分布范圍較窄,一直以來(lái)對(duì)其相關(guān)研究較少。然而,隨著煤層開(kāi)采的深度增加,煤礦H_2S氣體的危害逐漸顯露,同時(shí)由于H_2S氣體毒性大,當(dāng)濃度達(dá)到一定范圍內(nèi)有爆炸危險(xiǎn)性,因此關(guān)于H_2S在煤層內(nèi)的運(yùn)移規(guī)律及防治措施方面亟待研究。文章以山西潞安石圪節(jié)煤業(yè)有限責(zé)任公司石圪節(jié)煤礦15102為研究對(duì)象,通過(guò)實(shí)驗(yàn)室H_2S氣體吸收劑的研究,得出了能夠有效吸收H_2S氣體的溶液。同時(shí)通過(guò)數(shù)值模擬,研究在煤層采動(dòng)的影響下,其在煤層內(nèi)的運(yùn)移規(guī)律,以及不同注堿孔的布置位置對(duì)其運(yùn)移規(guī)律的影響。H_2S氣體吸收劑的研究顯示:表面活性劑溶液在濃度很低的時(shí)候(0.1%),就可以將堿液的表面張力從72.0 mN/m降低到40.0 mN/m,在煤樣吸液速度方面,堿性條件的1.5%的十二烷基苯磺酸鈉中的煤樣吸液速度最優(yōu),最終以1.5%十二烷基苯磺酸鈉、5%NaCO_3溶液和2%XS-2溶液為基料進(jìn)行復(fù)配,得出吸收H_2S氣體效果較好的吸收劑。數(shù)值模擬方面研究顯示:當(dāng)壓力穩(wěn)定時(shí),在距工作面10 m以內(nèi),近底板位置H_2S壓力比煤層中心位置稍大,隨著距工作面位置距離的增加,距底板位置距離的減小,H_2S氣體壓力逐漸增大,然而H_2S壓力差值非常小,在150 Pa以內(nèi)�？拷M(jìn)風(fēng)順槽及煤層豎向中心線位置H_2S氣體較小,煤層內(nèi)H_2S氣體壓力最大值為4000 Pa。當(dāng)距工作面及進(jìn)風(fēng)順槽距離大于30 m后,煤層內(nèi)H_2S氣體壓力一直穩(wěn)定在4000 Pa左右。在50天范圍內(nèi),H_2S氣體壓力快速降低,之后降低速度逐漸緩慢,當(dāng)時(shí)間大于200天之后,煤層內(nèi)H_2S氣體壓力變化開(kāi)始趨于穩(wěn)定。注堿孔位置不同時(shí),對(duì)煤層內(nèi)H_2S氣體壓力的影響不同,當(dāng)煤層注堿孔位置布置在距頂板0.36 m時(shí),煤層內(nèi)H_2S氣體壓力分布在豎向位置上呈對(duì)稱分布,整體壓力較小,在采取煤層注堿防治H_2S氣體時(shí),注堿孔宜布置在距頂板0.36 m水平線上。注堿孔間距不同時(shí),當(dāng)采用注堿孔間距為2 m時(shí),煤層內(nèi)中心位置切面H_2S氣體的壓力呈現(xiàn)出均勻分布的形態(tài),采用注堿孔間距為2 m�，F(xiàn)場(chǎng)試驗(yàn)結(jié)果有效使工作面H_2S的濃度降低到了30 ppm以下,為含H_2S煤礦的安全開(kāi)采提供了一定的理論及實(shí)驗(yàn)基礎(chǔ)。
[Abstract]:Coal resource is the basic energy for the development of various industries. Since the industrial revolution, it has contributed greatly to the economic development of each country. However, when mining coal in every country in the world, because of the occurrence of various disasters, casualties and economic losses are very large, which seriously restricts the development of economy. Due to its low content and narrow distribution, H2S in coal mines has been studied less. However, as the depth of coal seam mining increases, the harm of H2S gas in coal mine is gradually revealed. At the same time, due to the toxicity of H2S gas, there is a danger of explosion when the concentration reaches a certain range. Therefore, it is urgent to study the migration law and prevention measures of H _ 2S in coal seam. Taking Shigejie Coal Mine 15102, Shanxi Luan Shigejie Coal Industry Co., Ltd., as the research object, through the research of H _ 2S gas absorbent in laboratory, the solution which can effectively absorb H _ 2S gas is obtained. At the same time, through numerical simulation, the migration law of coal seam is studied under the influence of coal seam mining. The study of the effect of different location of alkali injection pore on the migration of gas absorbent shows that when the concentration of surfactant solution is very low (0.1%), the surface tension of alkali solution can be reduced from 72.0 mN/m to 40.0 mn / m, and the surface tension can be reduced from 72.0 mN/m to 40.0 mn / m when the concentration of surfactant solution is very low (0.1%). Sample absorption rate, The absorption rate of coal sample in 1.5% sodium dodecylbenzenesulfonate is the best. Finally, the mixture of 1.5% sodium dodecylbenzene sulfonate and 2%XS-2 solution is used as the base material, and the better absorbent for absorbing H 2S gas is obtained. The numerical simulation results show that when the pressure is stable, the Hass pressure near the floor is slightly larger than the central position of the coal seam within 10 m from the working face, and with the increase of the distance from the working face, The pressure of H2S gas increases gradually when the distance from the base plate is reduced, but the difference of H2S pressure is very small, within 150 Pa. The H2S gas is small near the inlet wind trench and the vertical centerline of the coal seam, and the maximum pressure of H2S gas in the coal seam is 4000 Pa. When the distance from the working face and the inlet air trench is more than 30 m, the Hass gas pressure in the coal seam has been stabilized at 4000 Pa or so. In the range of 50 days, the pressure of H2S gas decreases rapidly, and then decreases slowly. When the time is more than 200 days, the pressure change of H2S gas in coal seam begins to stabilize. Different locations of alkali injection holes have different effects on the pressure of H2S gas in coal seams. When the location of alkali injection holes in coal seams is 0.36 m from the roof, the distribution of gas pressure of H2S gas in coal seams is symmetrically distributed in the vertical position, and the whole pressure is relatively small. In the prevention of H2S gas by alkali injection in coal seam, the alkali injection hole should be arranged on the horizontal line of 0.36 m from the roof. When the spacing of alkali injection holes is 2 m, the pressure of H _ (2) S gas at the center of coal seam is uniformly distributed, and the distance between the holes is 2 m. The field test results effectively reduced the concentration of Hass to less than 30 ppm, which provides a theoretical and experimental basis for safe mining of coal mine containing H2S.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD711

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