本文選題：綜采工作面 + 粉塵運移規(guī)律�。� 參考：《遼寧工程技術大學》2013年博士論文

【摘要】：雙鴨山礦區(qū)是我國特大煤炭礦區(qū)之一,年產煤炭1360萬噸。隨著礦井高產高效建設和綜采配套設備的工藝創(chuàng)新,工作面單產大幅度提高。綜采工作面是煤礦產塵量最大的作業(yè)場所,粉塵濃度超過國家衛(wèi)生標準數十倍甚至上百倍,嚴重的威脅井下職工的身體健康和生命安全。因此,綜采工作面的粉塵防治已成為當前煤礦安全工作的重點和難題之一。 本文根據相關標準和要求,對雙鴨山礦區(qū)東榮二礦南二下延十八層七面綜采工作面的粉塵特性、濃度和分散度進行了現場測試和實驗室分析,得到了綜采工作面粉塵濃度和分散度沿程分布規(guī)律和特征。建立了綜采工作面粉塵分布與運移的氣固兩相流數學模型,給出了數學模型的邊界條件和解法,采用FLUENT6.3模擬分析了割煤時粉塵運動和粉塵濃度分布規(guī)律,同時分析了工作面風速和煤塵濕潤性對粉塵濃度分布的影響。根據東榮二礦南二下延十八層七面綜采工作面塵源特點,提出煤層高壓注水減塵聯合工作面高壓自動噴霧降塵的二級綜合降塵技術思路。 在煤層高壓注水防塵機理分析和東榮二礦南二下延十八層七面綜采工作面煤層注水試驗的基礎上,建立了高壓水在煤體中滲流的數學模型,數值模擬分析了高壓水在煤體中的流動規(guī)律及其對煤體的濕潤效果,確定了合理的煤層高壓注水壓力、注水鉆孔間距等工藝參數,提出并實施了煤層高壓注水方案,工作面減塵率達到72.1%。 分析了高壓噴霧降塵的影響因素,闡述了高壓噴霧降塵機理；基于單個液滴碰撞截留效率理論,建立了噴霧液滴群總捕塵效率模型；通過模型計算,系統(tǒng)研究了高壓噴嘴直徑、噴霧壓力與降塵效率之間的關系,給出了東榮二礦南二下延十八層七面工作面高壓噴霧降塵系統(tǒng)的合理壓力和噴嘴直徑；針對工作面塵源分布特點,設計并研發(fā)了綜采工作面高壓自動噴霧降塵系統(tǒng)和設備,并應用于現場實際,取得了81.3%的降塵效率。 在雙鴨山礦區(qū)三個綜采工作面實施應用了煤層高壓注水減塵聯合工作面高壓自動噴霧降塵的二級綜合降塵技術,總降塵率達到了93.3%-94.8%,實現了綜采工作面粉塵的有效防治。
[Abstract]:Shuangyashan mining area is one of the largest coal mining areas in China, with an annual coal output of 13.6 million tons. With the construction of high production and high efficiency in mine and the technological innovation of supporting equipment for fully mechanized coal mining, the unit yield of working face is greatly improved. Fully-mechanized mining face is the largest coal mine dust production site, dust concentration over the national health standards tens of times or even hundreds times, a serious threat to the health and safety of underground workers. Therefore, dust prevention and control in fully mechanized coal face has become one of the key and difficult problems in coal mine safety work. According to the relevant standards and requirements, the dust characteristics, concentration and dispersion of the 18 floor fully mechanized coal face in the south second extension of Dongrong No.2 Coal Mine in Shuangyashan Mining area were tested and analyzed in laboratory. The distribution law and characteristics of dust concentration and dispersity along the face of fully mechanized coal mining face are obtained. The mathematical model of gas-solid two-phase flow in fully mechanized coal mining face is established. The boundary conditions and solution of the mathematical model are given. The dust movement and dust concentration distribution during coal cutting are simulated and analyzed by FLUENT6.3. At the same time, the influence of wind speed and coal dust wettability on dust concentration distribution is analyzed. According to the dust source characteristics of 18 floors and seven face fully mechanized mining face in Nanerxiayian of Dongrong No.2 Coal Mine, a two-stage comprehensive dust control technology of high pressure water injection and dust reduction combined working face with high pressure automatic spray dust control is put forward. Based on the analysis of dust prevention mechanism of high pressure water injection in coal seam and the test of coal seam water injection in 18 layers and 7 faces fully mechanized mining face of south second extension of Dongrong No.2 Coal Mine, a mathematical model of seepage of high pressure water in coal body is established. The flow law of high pressure water in coal body and its wetting effect on coal body are analyzed by numerical simulation. The reasonable process parameters such as high pressure injection pressure of coal seam and spacing of water injection borehole are determined, and the scheme of high pressure water injection in coal seam is put forward and implemented. The dust abatement rate of working face is 72.1. The influencing factors of high pressure spray dust control are analyzed, and the mechanism of high pressure spray dust control is expounded. Based on the theory of single droplet collision retention efficiency, the total dust capture efficiency model of spray droplet group is established, and the diameter of high pressure nozzle is systematically studied through model calculation. Based on the relationship between spray pressure and dust control efficiency, the reasonable pressure and nozzle diameter of the high pressure spray dust control system in the 18-story working face of South No. 2 No. 2 Coal Mine in Dongrong No.2 Coal Mine are given, and the distribution characteristics of dust source in the working face are also discussed. The dust control system and equipment of high pressure automatic spray in fully mechanized coal mining face are designed and developed, and the dust control efficiency of 81.3% is obtained. In three fully mechanized mining faces of Shuangyashan mining area, the two-stage comprehensive dust control technology of high pressure water injection and dust reduction combined face with high pressure automatic spray dust control is applied. The total dust fall rate has reached 93.3- 94.8, and the effective prevention and treatment of dust in fully mechanized mining face has been realized.
【學位授予單位】：遼寧工程技術大學
【學位級別】：博士
【學位授予年份】：2013
【分類號】：TD714.4

【參考文獻】

相關期刊論文 前10條

1 王青松,金龍哲,孫金華;煤層注水過程分析和煤體潤濕機理研究[J];安全與環(huán)境學報;2004年01期

2 劉毅;蔣仲安;蔡衛(wèi);周鳳增;郭達;劉寶東;;綜采工作面粉塵運動規(guī)律的數值模擬[J];北京科技大學學報;2007年04期

3 張延松;高壓噴霧及其在煤礦井下粉塵防治中的應用[J];重慶環(huán)境科學;1994年06期

4 秦書玉,李琮祥,宋華嶺;煤層注水效果的預測及參數調整[J];煤炭工程師;1993年03期

5 黃聲樹,王茂吉;煤礦粉塵防治技術的現狀及發(fā)展方向[J];煤炭工程師;1993年05期

6 金龍哲;德國煤層注水防塵發(fā)展動向[J];煤炭工程師;1994年05期

7 李宗翔,海國治,秦書玉;煤層注水濕潤分布狀態(tài)的數值模擬[J];煤炭工程師;1997年05期

8 黃聲樹;我國煤礦粉塵防治技術的現狀及進展[J];煤炭工程師;1998年03期

9 李宗翔,秦書玉,孫廣義;煤層注水滲透特征的參數反演[J];遼寧工程技術大學學報;2003年06期

10 葛少成;齊慶杰;邵良山;;選煤廠毛煤倉倉頂粉塵析出機理與控制技術[J];遼寧工程技術大學學報;2007年03期

相關博士學位論文 前2條

1 黃炳香;煤巖體水力致裂弱化的理論與應用研究[D];中國礦業(yè)大學;2009年

2 周剛;綜放工作面噴霧降塵理論及工藝技術研究[D];山東科技大學;2009年

，

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