Numerical Analysis of Karst Water Inrush and a Criterion for Establishing the Width of Water-resistant Rock Pillars

Zhao, Yanlin; Luo, Shilin; Wang, Yixian; Wang, Weijun; Zhang, Lianyang; Wan, Wen
November 2017
Mine Water & the Environment;Nov2017, Vol. 36 Issue 4, p508
Academic Journal
Water-bearing caves in the Maokou limestone have caused disastrous water inrushes in mines in southern China. A linkage analysis between the hydro-mechanical coupling and the strength reduction method was used to investigate the stability of water-resistant rock pillars. The factor of safety (FOS) of the pillar was established, and a criterion for establishing the required width of the pillar was proposed in engineering practice, i.e., the width of the pillar should be based on the blast hole depth and blast-disturbance depth, along with a FOS of 1.5. The permeability of the water-resistant pillar and the probability of water inrush both increase as the strength reduction factor increases because the effective width of the pillar narrows. A numerical analysis of the Qiyi coal mine '4·16' water inrush accident shows that the cause of the inrush was that the 3.0 m wide barrier left by roadway excavation was too narrow to withhold the karst water pressure of about 4.0 MPa.


Related Articles

  • ECONOMIC COST ANALYSIS OF DRILLING AND BLASTING DEPEND OF DRILLING AND BLASTING PARAMETERS AT QUARRY ''DOBRNJA'' NEAR BANJA LUKA. Vladimir, Malbašiċ; Žarko, Kovačeviċ; Miodrag, Čelebić; Jovana, Crnogorac // Arhiv za Tehnicke Nauke / Archives for Technical Sciences;2015, Issue 13, p35 

    In the modern mining, best efficient organization by obtaining solid minerals, is getting with explosives utilization for blasting, with the growth of significance in the exploitation of mineral resources in the open pit mines with large capacities. In this paper technological stages of drilling...

  • Never say never. Schweber, Bill // EDN;02/17/2000, Vol. 45 Issue 4, p35 

    Focuses on the need for design engineers to re-examine assumptions and implications in evaluating a project's design and implementation. Case of the unexpected acceleration of a police van; Human error as cause of the incident; Need for encouragement of engineers' participation in design reviews.

  • MOUNTAIN BIKES FOR LIGHT RIDING.  // Consumer Reports;Jun95, Vol. 60 Issue 6, p431 

    Presents the ratings of mountain bikes. Store selection; Off-road performance; Safety factor. INSET: FOR A MOUNTAIN BIKE IN THIS CLASS, EXPECT....

  • Estimation of loader capacity based on the heap size distribution calculated by using numerical models. Tosun, A.; Konak, G. // Journal of Mining Science;May2013, Vol. 49 Issue 3, p441 

    In open pit mining, the heap size distribution that results from blasting is one of the most important parameters in determining loader productivity. The characteristic heap size distribution, which is determined based on the mean size distribution and the coefficient of uniformity, directly...

  • Evidences of the influence of the detonation sequence in rock fragmentation by blasting - Part I. Cardu, Marilena; Seccatore, Jacopo; Vaudagna, Alberto; Rezende, Alvaro; Galvão, Fabio; Bettencourt, Jorge; de Tomi, Giorgio // Rem: Revista Escola de Minas;jul-set2015, Vol. 68 Issue 3, p337 

    Drilling and blasting are fundamental operations in the mining cycle and constitute an important component of the mining costs. Rock fragmentation can in principle be managed by means of two options: by increasing or reducing the specific consumption of explosives, or by modifying the drilling...

  • Helicopter to String Final Wire on NPPD's Axtell to Kansas Line.  // Transmission & Distribution World Exclusive Insight;8/10/2012, p2 

    The article reports on the Nebraska Public Power District's call on the public to be aware of several safety factors as the Axtell to Kansas 345-kilovolt (kV)Transmission Project nears completion.

  • Landslides and neotectonic activities in the Main Boundary Thrust (MBT) zone: Southeastern Kumaun, Uttarakhand. Kothyari, Girish; Pant, P.; Luirei, Khayingshing // Journal of the Geological Society of India;Jul2012, Vol. 80 Issue 1, p101 

    Main Boundary Thrust (MBT) zone is constituted of some of the landslide prone areas in southeastern part of Kumaun Sub-Himalaya. Role of landslides as natural hazard and hill slope modifying agent is well documented from various part of Himalayan region and southern hills of Kumaun particularly...

  • Prediction of impending failure of embankments on soft ground. Hunter, Gavan; Fell, Robin // Canadian Geotechnical Journal;Feb2003, Vol. 40 Issue 1, p209 

    Presents a study that analyzed the deformation behavior and excess pore pressure response of several well-monitored embankments on soft ground that were constructed to failure. Factors that will lead to the detection of the onset of impending failure of embankments on soft ground; Actual factor...

  • PLC architecture can provide high safety integrity.  // Control Engineering;Sep98, Vol. 45 Issue 12, p31 

    Focuses on the high safety integrity that can be offered by a programmable logic controller (PLC) architecture used in nuclear safety systems. How the PLC works; Equipments that can minimize common mode failures; How the PLC testing was done.

  • Martinez, Demel at World Congress. Stoffer, Harry // Automotive News;10/13/1997, Vol. 71 Issue 5735, p3 

    Announces the topics of safety and globalization to be spotlighted at the January 1998 Automotive News World Congress in Michigan. The speakers to be Dr. Ricardo Martinez and Herbert Demel; Contact point.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics