Results 51 to 60 of about 34,329 (209)

Anchorage weakening effect of coal roadway sidewall with different destressing borehole diameters

Energy Science & Engineering, 2023
The pressure relief with large‐diameter boreholes is one of the effective methods to prevent coal bumps in deep coal roadway. An unreasonable pressure relief design can cause the rockbolt support failure and aggravate the deformation of the surrounding ...
Yanchun Yin, Hongjie Zhou, Yubao Zhang, Chao Wang, Yanhui Deng, Biao Chen   +5 more
doaj   +1 more source

Subgrade geology beneath railways in Manchester [PDF]

, 2005
It is not sufficient to identify fine-grained soils, only, as locations for potential subgrade problems as could be done using a traditional 2D geological map.
Freeborough, K., Gunn, D.A., Kessler, H., Lelliott, M., Nelder, L.M., Reeves, H.J.   +5 more
core  

Industrial structural geology : principles, techniques and integration : an introduction [PDF]

, 2015
The authors wish to acknowledge the generous financial support provided in association with this volume to the Geological Society and the Petroleum Group by Badley Geoscience Ltd, BP, CGG Robertson, Dana Petroleum Ltd, Getech Group plc, Maersk Oil North ...
Bond, Clare E, Richards, Francis L., Richardson, Nicholas J., Rippington, Stephen, Wilson, Robert W.   +4 more
core   +1 more source

Study on cleat structure and its influence on wellbore stability in coal seams

Youqicang pingjia yu kaifa, 2020
In order to illustrate the influences of the in-situ stress heterogeneity and cleat angle on wellbore stability of coal seam, the following researches have been done.
WANG Yuepeng, SUN Zhengcai, LIU Xiangjun, LIANG Lixi   +3 more
doaj  

Performance of shallow anchor in ice-rich silt [PDF]

, 2014
Thesis (M.S.) University of Alaska Fairbanks, 2014Shallow anchor systems have been widely used for decades due to their time and cost efficiency. Yet when it comes to cold regions like Alaska, new challenges caused by the harsh environment need to be ...
Lin, Chuang, 林闯
core  

Non-destructive testing of rock bolt fastening as an element of monitoring the state of mine workings [PDF]

, 2019
Purpose. To substantiate the informative parameter, to develop the method and equipment for non-destructive testing (NDT) of rock bolt fastening, as an element of geomechanical monitoring of the mine workings state. Methods.
Krasovskyi, I, Krukovskyi, O, Serhiienko, V, Skipochka, S   +3 more
core   +1 more source

Debonding along the fixed anchor length of a ground anchorage [PDF]

, 2014
Peer ...
Akisanya, A. R., Ivanovic, A.
core   +1 more source

Study on high-performance micro foam drilling flushing fluid for coal seam extraction drilling

矿业科学学报
In order to solve the problem that the traditional clean water and anhydrous flushing fluid are easy to cause borehole deformation and collapse, a microfoam borehole rinsing fluid system was constructed by optimizing the foaming agent, foam stabilizer ...
ZHANG Xuebo, QU Zhen, WANG Pan, PAN Rongkun   +3 more
doaj   +1 more source

Rugged, low-conductance, heat-flow probe [PDF]

, 1970
Lightweight, compact probe structure has low thermal conductance to enable accurate measurement of slight temperature gradients. Probe combines ruggedness, high precision, accuracy, and stability.
Boudreau, E. J., Hinckley, R. B., Lucas, R. M., Mc Cullough, J. E.   +3 more
core   +1 more source

Applied scientific and systemic problems of the related ore-dressing plants interaction in the event of decommissioning the massif that separates their quarries [PDF]

, 2020
Purpose. Determining the possible and substantiating expedient alternate design and engineering decisions regarding the stage of spacial union of the adjacent quarries belonging to various owners by mining the rock pillar between the No. 3 quarry of PJSC
Azarian, Volodymyr, Lutsenko, Serhii, Skachkov, Andrii, Titov, Danylo, Zaiarskyi, Ruslan, Zhukov, Serhii   +5 more
core   +1 more source