本文選題：采礦工程 + 地表塌陷區(qū)��； 參考：《巖石力學(xué)與工程學(xué)報(bào)》2017年S1期

【摘要】：利用自制的崩解率測(cè)試儀,配合SEM,CT等分析手段研究了廢石摻量、水泥添加量對(duì)銅坑礦地表塌陷區(qū)膏體處置體崩解特性影響規(guī)律,探討了處置體崩解機(jī)制。結(jié)果表明:在相同水泥添加量時(shí),隨廢石摻量增加,處置體崩解率減小、崩解時(shí)間縮短。在相同廢石摻量時(shí),隨水泥添加量增加,處置體崩解率大幅降低;將處置體崩解過程劃分為吸水崩解、穩(wěn)定崩解、崩解結(jié)束3個(gè)階段;處置體的黏結(jié)力源于水泥水化產(chǎn)物形成的強(qiáng)度;處置體內(nèi)部滲流是在滲透壓力作用下,隨機(jī)分布的開口通道與閉口通道不斷擴(kuò)展的結(jié)果;通道擴(kuò)展的驅(qū)動(dòng)力源于基質(zhì)吸力,當(dāng)處置體吸水后,通道中氣 液相向固相不斷傳遞力值,當(dāng)力值大于膠結(jié)產(chǎn)物的黏結(jié)力后,處置體持續(xù)崩解。當(dāng)力值小于黏結(jié)力時(shí),處置體不發(fā)生崩解。
[Abstract]:The influence of waste rock content and cement content on the disintegrating characteristics of paste disposal in the ground subsidence area of Tongkeng Mine was studied by means of self-made disintegrating rate tester and SEMM-CT. The disintegrating mechanism of the disposal body was also discussed. The results show that with the increase of waste rock content, the disintegrating rate decreases and the disintegration time is shortened at the same cement content. At the same amount of waste rock, the disintegrating rate of the disposal body decreases significantly with the increase of cement content, and the disintegration process of the disposal body is divided into three stages: water absorption disintegration, steady disintegration, and the end of disintegration. The bonding force of the disposal body originates from the strength of the cement hydration product; the seepage in the disposal body is the result of the continuous expansion of the randomly distributed open channel and the closed channel under the action of osmotic pressure; the driving force of the channel expansion is derived from the matrix suction. When the water was absorbed, the gas and liquid phase in the channel continuously transferred to the solid phase, and when the force value was greater than the bonding force of the cementation product, the disposal body continued to disintegrate. When the force value is less than the bonding force, the disposal body does not disintegrate.
【作者單位】： 昆明理工大學(xué)國(guó)土資源工程學(xué)院;北京科技大學(xué)土木與環(huán)境工程學(xué)院;
【基金】：中國(guó)博士后科學(xué)基金資助項(xiàng)目(2016M602722) 國(guó)家自然科學(xué)基金資助項(xiàng)目(51574013,51374034)~~
【分類號(hào)】：TD327

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