金属矿山
金屬礦山
금속광산
METAL MINE
2015年
4期
119-122
,共4页
纵向膨胀%温度作用%土体与井壁相互作用%弹塑性剪切模型%温度竖向附加应力
縱嚮膨脹%溫度作用%土體與井壁相互作用%彈塑性剪切模型%溫度豎嚮附加應力
종향팽창%온도작용%토체여정벽상호작용%탄소성전절모형%온도수향부가응력
Longitudinal expansion%Temperature action%Interaction between shaft lining and soil mass%El-plastic shear-ing model%Temperature vertical additional stress
深厚表土层竖井井壁破裂是严重危害煤矿生产的地质灾害。温度作用是导致井壁内竖向应力增大而诱发井壁破裂的一种重要因素。为了分析深厚表土层立井井壁因温度作用产生纵向膨胀对井壁受力状态的影响，在分析井壁与土体相互作用的基础上，根据热力学和弹性理论建立了井壁和土体剪切作用的弹塑性模型，推导了井壁温度竖向附加应力的计算公式。进一步分析表明：井壁内温度竖向附加应力随深度呈不断增大的趋势，并在基岩附近达到最大值；温度竖向附加应力随着弹塑性剪切段分界点的深度近似呈线性增加。这些结论有助于加深对深厚表土层井壁破裂机理的认识，并对井壁破裂预防治理具有理论指导作用。
深厚錶土層豎井井壁破裂是嚴重危害煤礦生產的地質災害。溫度作用是導緻井壁內豎嚮應力增大而誘髮井壁破裂的一種重要因素。為瞭分析深厚錶土層立井井壁因溫度作用產生縱嚮膨脹對井壁受力狀態的影響，在分析井壁與土體相互作用的基礎上，根據熱力學和彈性理論建立瞭井壁和土體剪切作用的彈塑性模型，推導瞭井壁溫度豎嚮附加應力的計算公式。進一步分析錶明：井壁內溫度豎嚮附加應力隨深度呈不斷增大的趨勢，併在基巖附近達到最大值；溫度豎嚮附加應力隨著彈塑性剪切段分界點的深度近似呈線性增加。這些結論有助于加深對深厚錶土層井壁破裂機理的認識，併對井壁破裂預防治理具有理論指導作用。
심후표토층수정정벽파렬시엄중위해매광생산적지질재해。온도작용시도치정벽내수향응력증대이유발정벽파렬적일충중요인소。위료분석심후표토층립정정벽인온도작용산생종향팽창대정벽수력상태적영향，재분석정벽여토체상호작용적기출상，근거열역학화탄성이론건립료정벽화토체전절작용적탄소성모형，추도료정벽온도수향부가응력적계산공식。진일보분석표명：정벽내온도수향부가응력수심도정불단증대적추세，병재기암부근체도최대치；온도수향부가응력수착탄소성전절단분계점적심도근사정선성증가。저사결론유조우가심대심후표토층정벽파렬궤리적인식，병대정벽파렬예방치리구유이론지도작용。
The shaft lining rupture in deep topsoil is a geological disaster,which seriously harm the coal mine produc-tion. Temperature action is an important factor that results in the increasing of vertical wellbore stress and induces the fracture of the shaft lining. In order to analyze the temperature effect of longitudinal expansion on shaft lining in deep alluvium,on the basis of analyzing the interaction between shaft lining and soil,the el-plastic shearing model of the soil and soil shearing was built according to thermodynamics and elastic theory,and the calculation formula of temperature vertical additional stress is in-duced. Further analysis shows that the temperature vertical additional stress in shaft lining increases with depth continuously, and reached the maximum value near the bedrock. The temperature vertical additional stress displays as an approximate linear increase with the depth of el-plastic shear section cut-off point. These findings contributes to deepening the understanding on the mechanism of shaft lining rupture in deep topsoil,and provides the theoretical basis for the prevention and governance of shaft lining fracture accident.
