本文關(guān)鍵詞： 松散承壓含水層 載荷傳遞 重復(fù)采動(dòng) 整體破斷　出處：《采礦與安全工程學(xué)報(bào)》2017年03期 　論文類型：期刊論文

【摘要】：以松散承壓含水層下壓架突水災(zāi)害的防治問題為工程背景,結(jié)合皖北祁東煤礦7131工作面的開采條件,研究了承壓含水層下重復(fù)采動(dòng)對(duì)覆巖破壞特征的影響規(guī)律。結(jié)果表明,當(dāng)松散承壓含水層下某一煤層工作面在初次采動(dòng)條件下存在壓架突水危險(xiǎn)時(shí),若其他鄰近煤層先開采使得該煤層回采處于重復(fù)采動(dòng)狀態(tài),覆巖結(jié)構(gòu)完整性降低,承壓含水層的載荷傳遞作用會(huì)受已采煤層的開采擾動(dòng)而減弱,該煤層工作面回采時(shí)覆巖不易發(fā)生如初次采動(dòng)條件下的整體破斷,壓架突水危險(xiǎn)性降低�；谥貜�(fù)采動(dòng)對(duì)覆巖破壞特征的影響規(guī)律,提出了松散承壓含水層下采煤的"釋壓開采"方法,即可將不具有壓架突水危險(xiǎn)的煤層作為"釋壓層"先開采,弱化承壓含水層對(duì)下部巖層的載荷傳遞作用,破壞壓架突水災(zāi)害的發(fā)生條件,從而避免承壓含水層下采煤壓架突水事故。
[Abstract]:Based on the engineering background of the prevention and treatment of water inrush disaster in the lower pressure frame of the loose confined aquifer, combined with the mining conditions of No. 131 face in Qidong Coal Mine, North Anhui Province, the influence of repeated mining under the confined aquifer on the failure characteristics of overburden rock is studied. The results show that, When there is a danger of water inrush in a coal face under the initial mining condition under the loose confined aquifer, if the other adjacent coal seams are mined first, the mining of the coal seam will be in the state of repeated mining, and the structural integrity of overburden rock will be reduced. The load transfer of the confined aquifer will be weakened by the mining disturbance of the coal seam, and the overburden is not easy to occur when the coal face is mined, such as the whole breakage under the initial mining condition. Based on the influence of repeated mining on the characteristics of overburden rock failure, a method of "decompression mining" for coal mining under loose confined aquifer is put forward. That is, the coal seam which does not have the danger of water inrush from the pressure frame can be mined as the "pressure releasing layer" first, which weakens the load transfer action of the confined aquifer to the lower rock formation and destroys the conditions for the occurrence of the water inrush disaster of the pressure frame. Therefore, water inrush accident of coal mining pressure frame under confined aquifer can be avoided.
【作者單位】： 中國(guó)礦業(yè)大學(xué)礦業(yè)工程學(xué)院煤炭資源與安全開采國(guó)家重點(diǎn)實(shí)驗(yàn)室;國(guó)家煤礦水害防治工程技術(shù)研究中心;金誠(chéng)信礦業(yè)管理股份有限公司;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51404246) 江蘇省自然科學(xué)基金項(xiàng)目(BK20140205) 江蘇高校優(yōu)勢(shì)學(xué)科建設(shè)工程項(xiàng)目 中國(guó)礦業(yè)大學(xué)優(yōu)秀創(chuàng)新團(tuán)隊(duì)資助項(xiàng)目(2014ZY004)
【分類號(hào)】：TD745

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本文編號(hào)：1530510