本文選題：開(kāi)采下保護(hù)層　切入點(diǎn)：效果　出處：《遼寧工程技術(shù)大學(xué)》2013年碩士論文

【摘要】：煤礦瓦斯突出事故是礦瓦斯災(zāi)害的重點(diǎn)問(wèn)題，突出危害之大使人們不得不去考慮和研究防突、消突的措施。保護(hù)層開(kāi)采目前被認(rèn)為是最經(jīng)濟(jì)、最有效的方法。 本文研究了下保護(hù)層開(kāi)采的保護(hù)效果和保護(hù)范圍的劃定。施工9個(gè)大鉆場(chǎng)，和一個(gè)單獨(dú)穿層鉆孔，共計(jì)50個(gè)考察鉆孔。分別研究壓力變化、膨脹量、透氣系數(shù)變化、鉆孔瓦斯流量變化、瓦斯含量變化等，最終目的都是為了確定保護(hù)范圍考察保護(hù)效果，為安全高效開(kāi)采服務(wù)。保護(hù)層開(kāi)采后在保護(hù)范圍內(nèi)，一般可使2#煤層原始瓦斯壓力降低0.5MPa左右；可使其透氣性系數(shù)平均增加777.1倍，傾斜上部最大增加了1552倍，下部最大增大了1135倍，透氣性最好的區(qū)域一般在工作面前方12m和工作面后方68m這個(gè)80m的范圍之內(nèi)；煤層的最大膨脹率達(dá)到23.7‰工作面后方60m，，處出現(xiàn)了膨脹量最大區(qū)域；2#煤層原始原煤瓦斯含量為10.26m~3/t，4#煤層回采后，其殘余原煤瓦斯含量降低為6.04m~3/t，平均下降了41.1%，從損失量、解吸量、殘存量上比較，主要在損失量上降低，其相對(duì)下降了94.6%，解析量相對(duì)下降了1.3%，殘存量相對(duì)下降19.1%;探明了4#煤層對(duì)2#煤層沿傾斜方向的上部卸壓角δ2=90o，下部卸壓角δ1=75°，沿走向方向?qū)?yīng)于始采線、采止線、煤柱邊緣位置卸壓角δ3=65o，垂直方向上最大保護(hù)垂距S下=48m，不破壞2#煤層的最小層間距H=9.4m。指出傾斜方向上部最大卸壓角取93.1o，下部最大卸壓角取78.6o，走向的最大卸壓角取67o。
[Abstract]:Coal mine gas outburst accident is the key problem of mine gas disaster, so people have to consider and study the measures to prevent outburst and eliminate outburst.Protection layer mining is currently considered to be the most economical and effective method.In this paper, the protection effect and protection range of the mining of the lower protective layer are studied.Construction of 9 large drilling sites, and a separate drilling layer, a total of 50 drill holes.The change of pressure, expansion, permeability, gas flow and gas content of borehole are studied respectively. The ultimate purpose is to determine the scope of protection, investigate the protection effect and serve for safe and efficient mining.After mining, the original gas pressure of coal seam can be reduced by about 0.5MPa, the permeability coefficient can be increased by 777.1 times on average, the maximum increase of inclined upper part is 1552 times, and that of lower part is 1135 times.The area with the best permeability is generally within the 80m range of 12m in front of the working face and 68m in the rear of the working face;Compared with the residual amount, it is mainly reduced in the amount of losses.Its relative decrease is 94.6m, the analytical quantity is decreased by 1.3and the residual amount is 19.10.It is proved that the pressure relief angle 未 _ (2990o) of the upper part of the coal seam and the angle 未 _ (1) (75 擄) of the lower part of the coal bed along the inclined direction of the coal seam in 2# coal seam are corresponding to the initial mining line and the mining line along the direction of the strike.The angle of relief pressure at the edge of coal pillar is 未 3 ~ (3) ~ (65) o, and the maximum vertical distance of protection in vertical direction is 48 m below S, without destroying the minimum seam spacing H ~ (9. 4) m of coal seam.It is pointed out that the maximum pressure relief angle is 93.1 ofor the upper part, 78.6 ofor the lower part, and 67 ofor the strike.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TD713

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 易麗軍;俞啟香;;低透氣性煤層瓦斯抽采增流技術(shù)[J];礦業(yè)安全與環(huán)保;2005年06期

2 徐彬;張軍;劉宏進(jìn);林府進(jìn);;保護(hù)層上風(fēng)巷穿層鉆孔抽采被保護(hù)層卸壓瓦斯的試驗(yàn)研究[J];礦業(yè)安全與環(huán)保;2007年03期

3 涂敏;繆協(xié)興;黃乃斌;;遠(yuǎn)程下保護(hù)層開(kāi)采被保護(hù)煤層變形規(guī)律研究[J];采礦與安全工程學(xué)報(bào);2006年03期

4 郭玉森;林柏泉;吳傳始;;圍巖裂隙演化與采動(dòng)卸壓瓦斯儲(chǔ)運(yùn)的耦合關(guān)系[J];采礦與安全工程學(xué)報(bào);2007年04期

5 許家林,錢(qián)鳴高;覆巖采動(dòng)裂隙分布特征的研究[J];礦山壓力與頂板管理;1997年Z1期

6 唐世斌,楊天鴻,徐濤,唐春安,石必明,余啟香;遠(yuǎn)程卸壓瓦斯抽放數(shù)值模擬[J];煤田地質(zhì)與勘探;2004年04期

7 李金嶺;劉德民;劉潤(rùn)軍;白文藝;;馬家溝礦煤與瓦斯突出預(yù)測(cè)指標(biāo)影響因素分析[J];煤;2010年04期

8 李成武,付京斌;煤與瓦斯突出敏感指標(biāo)的確定方法[J];煤礦安全;2003年S1期

9 朱詩(shī)山,劉向陽(yáng);低透氣性薄煤層瓦斯抽放方法[J];煤炭技術(shù);2003年08期

10 于不凡;;談煤和瓦斯突出機(jī)理[J];煤炭科學(xué)技術(shù);1979年08期

相關(guān)博士學(xué)位論文 前1條

1 胡國(guó)忠;急傾斜多煤層俯偽斜上保護(hù)層開(kāi)采的關(guān)鍵問(wèn)題研究[D];重慶大學(xué);2009年

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