Does exploring the characteristics of emergency supplies really matter for disaster response operations?     

Zhu  Xiaoxin  Regan  David  Sun  Baiqing 《Natural Hazards》2022,110(1):175-189

Natural Hazards - This article aims to provide a quantitative study of immediate food supplies based on a three-stage analysis. Firstly, a numerical autoregressive integrative moving average...  相似文献   

Numerical simulation of the Qulong Paleolandslide Dam event in the late pleistocene using the finite volume type shallow water model     

Sun  Xiaohui  Han  Xudong  Chen  Jianping  Bao  Yiding  Peng  Wei 《Natural Hazards》2022,111(1):439-464

Natural Hazards - The Qulong paleolandslide dam event lies in the Benzilan-Batang zone of the upper Jinsha River. The Jinsha River is one of the most extensive water resources in southwest China....  相似文献   

Directional Support Method for Tunnel Jointed Rock Mass     

Wu  Xu  Xu  Jinliang  Zhang  Liyuan  Sun  Jinglai  He  Zhengyu  Gao  Jun 《Geotechnical and Geological Engineering》2022,40(8):4171-4182

Geotechnical and Geological Engineering - In order to explore the directional support method of jointed rock mass and ensure the stable operation of roadway, the support effect of jointed rock mass...  相似文献   

Deviation Principles of Gas Drainage Drilling in Three-Soft Outburst Coal Seams     

Zhang  Qi  Liu  Qinzhi  Lou  Yahui  Kong  Dezhong 《Geotechnical and Geological Engineering》2022,40(6):3147-3168

Geotechnical and Geological Engineering - The trajectory of the actual gas drainage drilling often deviates from the design in the process of gas control drilling construction, resulting in the...  相似文献   

Analysis and Research on Blasting Network Delay of Deep-Buried Diversion Tunnel Crossing Fault Zone Based on EP-CEEMDAN-INHT     

Wu  Jing  Wu  Li  Sun  Miao  Lu  Ya-ni  Han  Yan-hua 《Geotechnical and Geological Engineering》2022,40(3):1363-1372

Geotechnical and Geological Engineering - The Empirical Mode Decomposition (EMD) of blasting seismic wave monitoring signal with noise can get IMFs with serious modal confusion and endpoint...  相似文献   

Deformation Movement of Hugely-Thick Conglomerate Stratum in Longwall Top Coal Caving     

Zhai  Xinxian  Zhao  Xiaofan  Zhai  Yanwei  Liu  Qinyu  Sun  Leqian 《Geotechnical and Geological Engineering》2022,40(3):1551-1564

Geotechnical and Geological Engineering - In the process of longwall top coal caving, the deformation and movement of the overlying hugely-thick conglomerate stratum (HTCS) directly affects the...  相似文献   

Study on Rationality of Large Diameter Pressure Relief Drilling Parameters Under Different Coal Seam Conditions     

Liu  Zhigang  Wang  Zhikang  Zhang  Ruoxiang  Sun  Xikui  Wenzheng  Shang 《Geotechnical and Geological Engineering》2022,40(11):5425-5436

Geotechnical and Geological Engineering - To study the influence of changes in the coal seam mechanical characteristics at depth on the stress relief effect of a borehole, this paper established...  相似文献   

Damage Constitutive and Failure Prediction of Artificial Single-Joint Sandstone Based on Acoustic Emission     

Sun  Bing  Yang  Haowei  Zeng  Sheng  Luo  Yu 《Geotechnical and Geological Engineering》2022,40(11):5577-5591

The effect law of deformation and failure of a jointed rock mass is essential for underground engineering safety and stability evaluation. In order to study the evolution mechanism and precursory characteristics of instability and failure of jointed rock masses, uniaxial compression and acoustic emission (AE) tests are conducted on sandstones with different joint dip angles. To simulate the mechanical behavior of the rock, a jointed rock mass damage constitutive model with AE characteristic parameters is created based on damage mechanics theory and taking into account the effect of rock mass structure and load coupling. To quantify the mechanism of rock instability, a cusp catastrophe model with AE characteristic parameters is created based on catastrophe theory. The results indicate that when the joint dip angle increases from 0° to 90°, the failure mechanism of sandstone shifts from tensile to shear, with 45° being the critical failure mode. Sandstone's compressive strength reduces initially and subsequently increases, resulting in a U-shaped distribution. The developed damage constitutive model's theoretical curve closely matches the test curve, indicating that the model can reasonably describe the damage evolution of sandstone. The cusp catastrophe model has a high forecast accuracy, and when combined with the damage constitutive model, the prediction accuracy can be increased further. The research results can provide theoretical guidance for the safety and stability evaluation of underground engineering.

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塔中地区良里塔格组海平面变化对高频层序和沉积演化的控制          下载免费PDF全文

高达  王明敏  陶叶  黄理力  孙春燕  黄鑫淼  武建伟 《中国地质》2022,49(6):1936-1950

【研究目的】碳酸盐岩地层易受海平面变化影响而发育高频层序,但是反映海平面变化的地化指标的精度不足,导致高频层序对海平面振荡的响应认识不够深入,高频海平面变化对台地边缘礁滩沉积的高频层序和沉积演化的控制尚不明确。【研究方法】论文研究选取塔里木盆地塔中地区某钻井的上奥陶统良里塔格组连续取心资料,通过密集取样开展微相分析和碳、氧同位素测试分析。【研究结果】该井良里塔格组中上部发育7种微相类型,沉积演化分析表明良里塔格组沉积中—晚期,沉积环境由潮坪向生物礁-颗粒滩再到较深水的开阔台地演化。碳、氧同位素测试显示δ¹³C为0.5993‰~1.6228‰（均值1.139‰）,δ¹⁸O值为-8.3608‰~-5.1452‰（均值为-6.790‰）;δ¹³C和δ¹⁸O的振荡变化与微相变化和沉积旋回对应良好。古海洋条件分析表明,良里塔格组沉积时期气候温热,礁、滩体发育层段样品的古温度值最高,代表着高的碳酸盐产率;Z值所反映的古盐度在底部潮坪沉积段最高,在高频旋回的顶部古盐度均明显减小,指示可能存在大气淡水的影响。与塔北地区南缘和巴楚地区的δ¹³C和δ¹⁸O存在一定差异,主要受控于沉积环境和古水深。【结论】良里塔格组中—上部存在至少3个完整的海平面升降变化周期,内部又包括至少2个次级周期;不同级别的海平面振荡主要受古气候变化驱动,并控制了高频层序的发育。海平面先缓慢上升再持续稳定或小规模振荡,是连续厚层的生物碎屑和砂屑颗粒滩沉积发育的有利条件;良里塔格组沉积晚期海平面快速上升,沉积环境向滩间洼地和较深水的开阔台地转变。在高频层序顶部海平面的小规模下降导致的早期岩溶作用是礁滩体储层质量改善的重要因素。  相似文献   

常规测井—气测资料在H油田K油藏碳酸盐岩储层流体识别中的应用     

张攀  刘红岐  王伟俊  辛炯垄  孙扬沙 《地质科技情报》2022,41(3):140-149

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