Groundwater quality evaluation and its suitability for domestic and irrigation use in the hard rock terrain of Olakkur block, Tamilnadu, India by D. Vinodh., S. Senthilkumar, B. Gowtham, Talelign Wegene, M. Jeevanandam

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Groundwater quality evaluation and its suitability for domestic and irrigation use in the hard rock terrain of Olakkur block, Tamilnadu, India by D. Vinodh., S. Senthilkumar, B. Gowtham, Talelign Wegene, M. Jeevanandam

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Experimental Study on Characteristics of Seismic Damage and Damping Technology of Absorbing Joint of Tunnel Crossing Interface of Soft and Hard Rock by Dao-yuan Wang, Jin-xiu Yuan, Guang-yao Cui, Jia Liu, Hong-fan Wang

“…However, the survey of seismic damage showed that the seismic damage of tunnel also mainly occurred in geological section at interface of soft and hard rock. Currently, merely scholars have made some research studies on characteristics of seismic damage and damping technology of tunnel crossing the vertical interface between soft and hard rock in high intensity area, and the mechanism of seismic damage has not been clearly revealed. …”
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Mechanism of Support Optimization and Confined Blasting of Thick and Hard Rock with a Wedge-Structure Immediate Roof: A Case Study by Tong Zhao, Peilin Gong, Kaan Yetilmezsoy, Majid Bahramian, Changyou Liu, Xiaofei Gong

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The Numerical Simulation of Hard Rocks for Tunnelling Purposes at Great Depths: A Comparison between the Hybrid FDEM Method and Continuous Techniques by Nicholas Vlachopoulos, Ioannis Vazaios

“…Especially, when it comes to hard rocks at great depths, the rockmass is more likely to respond in a brittle manner during the excavation. …”
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Overlying strata movement law and rockburst prevention & control for fully mechanized top coal caving face in extra-thick coal seams by Hai Rong, Longyue He, Yadi Wang, Xiangzhi Wei, Shilong Wei, Suihan Yang, Jincheng Li, Linlin Chen

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Potential Use of Organic- and Hard-Rock Mine Wastes on Aided Phytostabilization of Large-Scale Mine Tailings under Semiarid Mediterranean Climatic Conditions: Short-Term Field Study by Claudia Santibañez, Luz María de la Fuente, Elena Bustamante, Sergio Silva, Pedro León-Lobos, Rosanna Ginocchio

“…The study evaluated the efficacy of organic- and hard-rock mine waste type materials on aided phytostabilization of Cu mine tailings under semiarid Mediterranean conditions in order to promote integrated waste management practices at local levels and to rehabilitate large-scale (from 300 to 3,000 ha) postoperative tailings storage facilities (TSFs). …”
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The use of radar-optical remote sensing data and geographic information system–analytical hierarchy process–multicriteria decision analysis techniques for revealing groundwater rec... by Wang Yuxia, Han Yanzhong, Guo Yujiao, Wang Jingwei, Wang Nana, Abdelkareem Mohamed

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Experimental Investigation of Unloading-Induced Red Sandstone Failure: Insight into Spalling Mechanism and Strength-Weakening Effect by Yong Luo, Fengqiang Gong, Dongqiao Liu

“…Based on the test results, the effects of the unloading rate and confining pressure on the strength and failure characteristics of hard rock were explored, and a reasonable explanation for unloading-induced spalling in hard rock tunnels was presented. …”
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Seismic response and damage model analysis of rocky slopes with weak interlayers by Zhao Yawen, Dong Jinyu, Liu Handong, Wang Chuang

“…The slope damage is primarily concentrated below two-third of the hard rock height and primarily in the shallow and surface regions of the slope. …”
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Multiple Influence Factor Sensitivity Analysis and Height Prediction of Water-Conducting Fracture Zone by Xiaobin Li, Quansheng Li, Xuhui Xu, Yongqiang Zhao, Peng Li

“…Results show that the sensitivity coefficient of mining thickness, ratio coefficient of hard rock lithology, mining depth, and length of working face was 0.75, 0.69, 0.66, and 0.58, respectively. …”
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Addressing Depletion in Alluvial Aquifers by Partik Kumar, Veena Srinivasan

“…However, abstraction far exceeds natural recharge, resulting in a gradual decline. The hard-rock aquifers of peninsular India are also subjected to over-exploitation. …”
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A Rock Fracturing Method Using High-Pressure Gas Expansion: Case Study on Its Application in Hangzhou-Lin’an Intercity Railway by Dunwen Liu, Yu Tang, Caiwu Cai, Yinghua Jian

“…It is difficult to perform nonexplosive continuous excavation on hard rock connecting passage in crowded cities with dense high buildings and populations safely and rapidly. …”
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Prevention Technology for Strong Mine Pressure Disaster in the Hard-Roof Large-Mining-Height Working Face by Hongfei Duan, Lijuan Zhao

“…To solve the problem whereby the stope’s hard roof is difficult to collapse, the hard rock key stratum of the roof was hydraulically fractured to weaken the mechanical properties of the roof rock stratum. …”
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Study of Two-Step Parallel Cutting Technology for Deep-Hole Blasting in Shaft Excavation by Renshu Yang, Changda Zheng, Liyun Yang, Jinjing Zuo, Tonglei Cheng, Chenxi Ding, Qing Li

“…In hard rock deep-hole blasting excavation, blastholes are rarely utilized due to the clamping effect of the lower rock, which affects excavation progress and restricts the development and application of deep-hole blasting technology. …”
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KIDS CLUB: CHILD-FRIENDLY HOTEL MARKETING STRATEGY by Dian Pramita Sugiarti, I Gede Anom Sastrawan

“…The activities offered by the hotel are painting, coloring, storytelling, drawing, watching movies, and outdoor activities, namely parks made with the concept of adventure. Hard Rock Hotel Bali is one of the hotels that provides a kids club with full activities divided by age and supporting facilities provided. …”
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Rockburst Inducement Mechanism and Its Prediction Based on Microseismic Monitoring by Yongsong Li, Chao Zhou

“…The rockburst disaster in the hard rock caused by excavation and unloading of deep underground caverns threatens the safety of engineering construction. …”
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A New Method for Predicting Residual Strength of Rock in Water Diversion Tunnel Using Drilling Process Monitoring by Wanfei Gao

“…Although the proposed model is empirical, the parameters in the proposed model have clear physical meaning, and it can successfully predict the peak strength and residual strength of hard rock, medium rock, and weak rock using drilling process monitoring in the field. …”
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Numerical Study on 4-1 Coal Seam of Xiaoming Mine in Ascending Mining by Lan Tianwei, Zhang Hongwei, Li Sheng, Han Jun, Song Weihua, A. C. Batugin, Tang Guoshui

“…Coal seams ascending mining technology is very significant, since it influences the safety production and the liberation of dull coal, speeds up the construction of energy, improves the stability of stope, and reduces or avoids deep hard rock mining induced mine disaster. Combined with the Xiaoming ascending mining mine 4-1, by numerical calculation, the paper analyses ascending mining 4-1 factors, determines the feasibility of ascending mining 4-1 coalbed, and proposes roadway layout program about working face, which has broad economic and social benefits.…”
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Approvisionner les villes en briques et en tuiles : les carrières urbaines d’argile en France by Bruno Comentale

“…Moreover, the presence of clay quarries very close to cities and their incorporation into a growing urban fabric seems more uncertain than in the case of hard rock quarries about which more is known. After noting the concentration of the brick and tile industry in the vicinity of several cities in France, the study addresses the cases of the cities of Paris, Lille and Beauvais and the areas within these cities where bricks or tiles are more frequently used in buildings. …”
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