疊加開采裂隙場(chǎng)演化與優(yōu)勢(shì)瓦斯通道形成機(jī)制
發(fā)布時(shí)間:2019-06-09 20:46
【摘要】:為獲得近距離煤層群開采時(shí)上覆巖層瓦斯(甲烷)通道的形成與演化規(guī)律,采用相似模擬方法研究裂隙場(chǎng)的演化規(guī)律與瓦斯通道的形成機(jī)制。結(jié)果表明:采動(dòng)裂隙場(chǎng)隨工作面的推進(jìn),非勻速擴(kuò)展,來壓期間的擴(kuò)展比正常推進(jìn)期間快;采動(dòng)裂隙場(chǎng)與工作面的推進(jìn)具有同步協(xié)調(diào)的關(guān)系,且裂隙場(chǎng)可劃分為裂隙發(fā)育區(qū)、裂隙貫通區(qū)、壓實(shí)區(qū);近距離煤層群的疊加開采加劇了采動(dòng)裂隙場(chǎng)的演化,形成了縱橫交錯(cuò)的瓦斯流動(dòng)通道,且瓦斯的流動(dòng)能力在優(yōu)勢(shì)瓦斯通道區(qū)、優(yōu)勢(shì)瓦斯通道過渡區(qū)、一般瓦斯通道區(qū)中依次減弱。
[Abstract]:In order to obtain the formation and evolution law of gas (methane) channel in overlying strata during mining of close coal seam group, the evolution law of fracture field and the formation mechanism of gas channel are studied by using similar simulation method. The results show that the mining fracture field expands at an uneven speed with the advance of the working face, and the expansion during the pressure period is faster than that during the normal advance period. There is a synchronous and coordinated relationship between the mining fracture field and the advance of the working face, and the fracture field can be divided into fracture development area, fracture penetration area and compaction area. The superimposed mining of close coal seam group aggravates the evolution of mining fracture field, and forms a crisscross gas flow channel, and the gas flow ability is in the dominant gas channel area and the dominant gas channel transition area. In general, the gas channel area is weakened in turn.
【作者單位】: 安徽理工大學(xué)能源與安全學(xué)院;
【基金】:國家自然科學(xué)基金資助(51504005) 安徽省高校自然科學(xué)研究項(xiàng)目重點(diǎn)項(xiàng)目(KJ2017A093) 2016年安徽理工大學(xué)大學(xué)生創(chuàng)新創(chuàng)業(yè)訓(xùn)練計(jì)劃項(xiàng)目(201610361141)
【分類號(hào)】:TD712
[Abstract]:In order to obtain the formation and evolution law of gas (methane) channel in overlying strata during mining of close coal seam group, the evolution law of fracture field and the formation mechanism of gas channel are studied by using similar simulation method. The results show that the mining fracture field expands at an uneven speed with the advance of the working face, and the expansion during the pressure period is faster than that during the normal advance period. There is a synchronous and coordinated relationship between the mining fracture field and the advance of the working face, and the fracture field can be divided into fracture development area, fracture penetration area and compaction area. The superimposed mining of close coal seam group aggravates the evolution of mining fracture field, and forms a crisscross gas flow channel, and the gas flow ability is in the dominant gas channel area and the dominant gas channel transition area. In general, the gas channel area is weakened in turn.
【作者單位】: 安徽理工大學(xué)能源與安全學(xué)院;
【基金】:國家自然科學(xué)基金資助(51504005) 安徽省高校自然科學(xué)研究項(xiàng)目重點(diǎn)項(xiàng)目(KJ2017A093) 2016年安徽理工大學(xué)大學(xué)生創(chuàng)新創(chuàng)業(yè)訓(xùn)練計(jì)劃項(xiàng)目(201610361141)
【分類號(hào)】:TD712
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