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- the evolution of surrouding rock stress field 圍岩應力場演變
- The Relations Between Rockburst and Surrounding Rock Stress in Underground Chambers. 地下洞室中岩爆與圍岩應力的關係。
- anchorage during surrouding rock 圍岩錨固
- Using the elastic theory,the au-thor attempts to calculate approximately the relative change of rock stress after coalextraction. 本文試圖利用彈性理論近似地計算采動后的應力相對變化。
- BQ method is suggested as one of favourable ways for evaluation and classification of rockmass quality in the low rock stress region. 採用岩體力學介質屬性分級方法(即BQ法)對研究區引水洞、溢洪洞以及泄洪洞進口段圍岩進行了岩體質量分級與評價。
- In this paper,by the monitoring of rock stress behavior around mine opening and the monitory of anchoring force,the monitoring of the bolt is realized. 本文通過對巷道圍岩的變形監測、錨桿錨固力監測達到對錨桿支護質量的監測。
- Abstract: Rock stress state in situ is determined by the hydrofracturing method for rock stress measurement in a railway tunnel in northwestern Yunnan. 摘 要: 通過地應力測量,確定出工程區隧道圍岩現今地殼應力狀態,即原地應力的大小和方向。
- Some distribution rules of surrounding rock stress of the tunnel are summarized to provide the reasonable references to design and construction of this tunnel. 總結了該斷層地段隧道圍岩應力的一些分佈規律,為該工程的設計和施工提供了合理的參考依據。
- The in situ rock stress prevents the rise of confined water and water inrush for thick floor aquifuge,but for thin floor aquifuge the in situ rock stress wo... 指出對於厚底板隔水層,原岩應力起著阻止底板承壓水上升和突出的作用,對於薄底板隔水層,原岩應力起著破壞底板、導致承壓水突出的作用。
- The in situ rock stress prevents the rise of confined water and water inrush for thick floor aquifuge,but for thin floor aquifuge the in situ rock stress wo. 介紹了水力壓裂應力測量的原理和現場測量結果,論述了煤層底板隔水層帶的阻水機理和承壓水沿煤層上升的機理,以及原岩應力、水壓與裂隙擴展的關係。
- Whatever the straight line part of the stress-strain curve may be,it is always possible to find out the rock stress threshold by the peak value of the S-wave veloc. 試驗結果表明:不論應力應變曲線上的直線部分是否明顯,都可以用檢測橫波速度最大值的辦法確定岩石的應力門檻值;並建議對求岩石泊松比的常規方法有必要進行重新調整。
- The little tremie grouting is applicable to low-level surrouding rock; 小導管注漿多適用於低類別圍岩;
- Stress can be the undoing of so many fine players. 緊張可能是這許多優秀選手失敗的原因。
- Abstract: This paper discribes the principle of rook acoustic emission techniques.Some applications such as insitu rock stress measuring,locating high stress zone,predicting roof falling and evaluating rook stability are presented. 文摘:論述了岩體聲發射技術的基本原理,介紹了其在採礦工程中的若干應用成果:地應力測量、高應力區圈定、冒頂預測預報、穩定性評價。
- It is shown that regional initial rock stress state is controlled by larger faults and that heterogeneity and aeolotropism of initial rock stress field are caused by superposition of action of faults. 研究結果表明:區域原岩應力狀態宏觀上主要受幾何尺寸大的斷層的支配,局部範圍內受複合斷層的疊加擾動影響,造成了原岩應力狀態的各向異性及非均勻分佈特徵。
- Aiming at the characteristic of the distortion of the extremely hard maintained roadway, the numerical analysises were made on surrounding rock stress and displacement in roadway with FLAC program. 針對極難維護放頂煤回採巷道的變形特點,依據FLAC程序對不同支架形式的巷道圍岩應力場和位移場進行了數值模擬。
- Different methods for the determination of initial rock stresses and the principle of its test borehole layout are also presented. 介紹了各種控制致裂測試鑽孔布置原則及原岩應力的計算方法。
- In the word "mother" the stress is on the first syllable. 在"mother"這一字里,重音在第一個音節上。,在"mother"這一字里,重音在第一個音節上。
- The rock was honeycombed with passages. 岩石上有許多蜂窩狀的小孔。
- With the increase of mining depth,pre-mining rock stresses increase dramatically,which leads to the rise of the frequency of rock burst occurrence and the drop of mine safety. 隨著礦山開採深度的增加,原岩應力水平大大提高,導致岩爆等災害發生頻率提高,礦山生產的安全性下降。