【摘要】：隨著采煤技術(shù)的發(fā)展和開采深度的增加,瓦斯事故在我國(guó)各礦頻繁發(fā)生,煤礦瓦斯防治成為煤礦安全生產(chǎn)的重中之重,瓦斯抽采方法與礦井的實(shí)際結(jié)合將會(huì)對(duì)礦井的安全連續(xù)生產(chǎn)、瓦斯治理起到關(guān)鍵的作用。論文針對(duì)石泉煤礦下保護(hù)層開采過程中遇到的瓦斯問題,提出下保護(hù)開采瓦斯抽采技術(shù)方案。 論文在收集大量的參考資料、理論分析和現(xiàn)場(chǎng)調(diào)研的基礎(chǔ)上,通過理論分析確定石泉煤礦下保護(hù)層開采的可行性,并運(yùn)用FLAC3D數(shù)值模擬軟件對(duì)保護(hù)層開采后上覆煤層的底板位移變化規(guī)律和塑性區(qū)分布規(guī)律進(jìn)行模擬,以膨脹率超過3‰作為充分卸壓標(biāo)準(zhǔn),從而確定被保護(hù)煤層在走向和傾向方向的卸壓范圍；通過理論分析和現(xiàn)場(chǎng)實(shí)測(cè)分析了卸壓瓦斯運(yùn)移規(guī)律,并運(yùn)用FLUENT模擬軟件對(duì)工作面通風(fēng)條件下和采空區(qū)埋管抽采條件下采空區(qū)瓦斯運(yùn)移進(jìn)行模擬；結(jié)合下保護(hù)層開采上覆煤層卸壓范圍及卸壓瓦斯運(yùn)移規(guī)律,設(shè)計(jì)采用密集順層平行工作面鉆孔抽采方法、穿層鉆孔抽采上鄰近層瓦斯的抽采方法、現(xiàn)采空區(qū)埋管抽采及全封閉抽采老采空區(qū)的抽采方法,對(duì)下保護(hù)層開采條件下卸壓瓦斯進(jìn)行瓦斯抽采；通過現(xiàn)場(chǎng)實(shí)測(cè)結(jié)果驗(yàn)證抽采效果達(dá)標(biāo),保護(hù)效果良好,不僅保證了開采層的安全生產(chǎn),而且增加了對(duì)被保護(hù)層的保護(hù)效果,具有很高的應(yīng)用推廣價(jià)值。
[Abstract]:With the development of coal mining technology and the increase of mining depth, gas accidents occur frequently in every mine of our country. The prevention and control of coal mine gas becomes the most important in the safe production of coal mine. The combination of gas extraction method and mine practice will play a key role in the safe and continuous production of mine and gas control. Aiming at the gas problems encountered in the mining process of the protective layer under Shi Quan coal mine, this paper puts forward the technical scheme of gas drainage under protection mining. On the basis of collecting a large number of reference materials, theoretical analysis and field investigation, this paper determines the feasibility of mining protection layer under Shi Quan coal mine through theoretical analysis. The FLAC3D numerical simulation software is used to simulate the variation of floor displacement and the distribution of plastic zone of the overlying coal seam after the mining of the protective layer. The expansion rate is more than 3 鈥，

本文編號(hào)：2226130