注漿加固與含水層改造底板采動(dòng)效應(yīng)孔巷電阻率CT探測(cè)研究
發(fā)布時(shí)間:2019-05-16 17:29
【摘要】:底板注漿加固與含水層改造是承壓水體上煤層安全開(kāi)采底板巖溶水害防治的有效方法之一.為了評(píng)價(jià)注漿加固和含水層改造底板的采動(dòng)效應(yīng)特征.以皖北恒源煤礦Ⅱ615工作面為研究對(duì)象,采用孔巷電阻率CT法,按照采動(dòng)底板活動(dòng)規(guī)律設(shè)計(jì)觀測(cè)方案.進(jìn)行了注漿底板破壞深度的動(dòng)態(tài)電阻率CT探測(cè)試驗(yàn).獲得了Ⅱ615工作面底板強(qiáng)破壞帶深度為8.0 m.裂隙帶深度為14.0 m以及煤層底板采動(dòng)裂隙演化過(guò)程的電阻率響應(yīng)特征.結(jié)果表明:孔巷間電阻率的變化較好地反映了底板巖體的受力狀態(tài)、結(jié)構(gòu)變化以及破壞程度,探測(cè)結(jié)果直觀準(zhǔn)確;注漿后底板采動(dòng)影響范圍和破壞深度均減小,反映了注漿后底板抗破壞能力增強(qiáng),提高了承壓水體上煤層開(kāi)采的安全性.
[Abstract]:Grouting reinforcement of floor and reconstruction of aquifer is one of the effective methods to prevent and control Karst water damage in coal seam safe mining in confined water body. In order to evaluate the mining effect characteristics of grouting reinforcement and aquifer reconstruction floor. Taking the 鈪,
本文編號(hào):2478443
[Abstract]:Grouting reinforcement of floor and reconstruction of aquifer is one of the effective methods to prevent and control Karst water damage in coal seam safe mining in confined water body. In order to evaluate the mining effect characteristics of grouting reinforcement and aquifer reconstruction floor. Taking the 鈪,
本文編號(hào):2478443
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