采矿与安全工程学报
採礦與安全工程學報
채광여안전공정학보
JOURNAL OF MINING AND SAFETY ENGINEERING
2014年
3期
462-468,475
,共8页
王路珍%陈占清%孔海陵%倪晓燕
王路珍%陳佔清%孔海陵%倪曉燕
왕로진%진점청%공해릉%예효연
破碎泥岩%变质量%渗透压力%初始孔隙度%渗流突变
破碎泥巖%變質量%滲透壓力%初始孔隙度%滲流突變
파쇄니암%변질량%삼투압력%초시공극도%삼류돌변
broken mudstone%variable mass%seepage pressure%initial porosity%seepage burst
为揭示不同埋深岩溶陷落柱在承压水压力和压实程度2种影响因素作用下的突水机理，利用改进的变质量破碎岩石渗流试验系统，进行了考虑颗粒迁移的破碎泥岩变质量渗流试验，得出渗流突变历时、突出物质量、突出物质量变化率及孔隙度变化率等在渗透压力和初始孔隙度共同作用下的变化规律。研究表明：1)在渗流初始阶段，渗透压力和流量稳定；渗流突变时，渗透压力和流量均发生剧变，变化幅度与试样的突出物质量和孔隙结构调整情况有关。2)随初始孔隙度增大、渗透压力增加，突水历时变短，突出物质量增大，二者均可由渗透压力和初始孔隙度表示为对数函数，突出物质量变化率和孔隙度变化率均变快，可用指数函数拟合。3)随着渗透压力增大，突水历时、突出物的质量、突出物质量变化率和孔隙度变化率受初始孔隙度的影响逐渐减弱。
為揭示不同埋深巖溶陷落柱在承壓水壓力和壓實程度2種影響因素作用下的突水機理，利用改進的變質量破碎巖石滲流試驗繫統，進行瞭攷慮顆粒遷移的破碎泥巖變質量滲流試驗，得齣滲流突變歷時、突齣物質量、突齣物質量變化率及孔隙度變化率等在滲透壓力和初始孔隙度共同作用下的變化規律。研究錶明：1)在滲流初始階段，滲透壓力和流量穩定；滲流突變時，滲透壓力和流量均髮生劇變，變化幅度與試樣的突齣物質量和孔隙結構調整情況有關。2)隨初始孔隙度增大、滲透壓力增加，突水歷時變短，突齣物質量增大，二者均可由滲透壓力和初始孔隙度錶示為對數函數，突齣物質量變化率和孔隙度變化率均變快，可用指數函數擬閤。3)隨著滲透壓力增大，突水歷時、突齣物的質量、突齣物質量變化率和孔隙度變化率受初始孔隙度的影響逐漸減弱。
위게시불동매심암용함락주재승압수압력화압실정도2충영향인소작용하적돌수궤리，이용개진적변질량파쇄암석삼류시험계통，진행료고필과립천이적파쇄니암변질량삼류시험，득출삼류돌변력시、돌출물질량、돌출물질량변화솔급공극도변화솔등재삼투압력화초시공극도공동작용하적변화규률。연구표명：1)재삼류초시계단，삼투압력화류량은정；삼류돌변시，삼투압력화류량균발생극변，변화폭도여시양적돌출물질량화공극결구조정정황유관。2)수초시공극도증대、삼투압력증가，돌수력시변단，돌출물질량증대，이자균가유삼투압력화초시공극도표시위대수함수，돌출물질량변화솔화공극도변화솔균변쾌，가용지수함수의합。3)수착삼투압력증대，돌수력시、돌출물적질량、돌출물질량변화솔화공극도변화솔수초시공극도적영향축점감약。
In order to study the water inrush mechanism of Karst collapse column in different depths with coupled underground water pressure and compaction degree, a modified variable mass seepage experiment system on broken rock was used to conduct variable mass seepage experiments for broken mudstone considering particle migration. The duration time of seepage burst, weight of gushed particle, change rate of gushed particle weight and change rate of porosity were recorded and calculated, and the change rules under seepage pressure and initial porosity were obtained. It shows that in the initial seep-age stage, seepage pressure and flow are stable, they change rapidly when seepage burst happens, and the change range is related to weight of gushing particle and the process of pore structure adjusting. With the initial porosity and seepage pressure increasing, the duration time of seepage burst gets shorter,weight of gushed particle gets larger, and these two parameters are fitted by logarithmic functions relat-ing to seepage pressure and initial porosity; change rate of gushed particle weight and change rate of porosity get faster and both are fitted by exponential functions relating to seepage pressure and initial porosity. With seepage pressure increasing, the influence of initial porosity on the duration time of seepage bursts, weight of gushed particle, change rate of gushed particle weight and change rate of po-rosity are gradually weakened.
