Results 81 to 90 of about 181,923 (295)
Critical expansion points: Mechanical signs of surrounding rock instability
Deep Underground Science and Engineering, EarlyView.This study proposes the Rock Bearing‐Expansion Model (RockBEM) with critical expansion points (CEPs) to quantify post‐peak damage stages in deep‐buried rock masses via plane strain compression test (PSCT). CEP hysteresis&interval ratios reveal bearing performance dynamics and failure severity, advancing mechanistic insights into deep underground rock ...
Jiaqi Wen +4 more
wiley +1 more source
Theoretical and technological concepts of synergistic coal and natural gas extraction
Meitan kexue jishuThere are a large number of overlapping coal and natural gas resources in China, and due to the requirement of resource extraction efficiency, a large number of overlapping coal and natural gas resources need to be extracted synchronously in the same ...
Shengli YANG +5 more
doaj +1 more source
Independent Expert Scientific Panel – Report on Unconventional Oil and Gas [PDF]
, 2014 No abstract ...
Curran, J. +8 more
core +1 more source
Implementation of probabilistic approach to rock mass strength estimation while excavating through fault zones [PDF]
, 2019 Purpose. The paper addresses the rock mass state estimation while excavating a cross-heading through the area of regional fault “Bohdanivskyi” based on probabilistic approach to assessing the rock strength. Methods.
Babets, D +4 more
core +1 more source
Deep Underground Science and Engineering, EarlyView.An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang +5 more
wiley +1 more source
Formation of thermal fields by the energy-chemical complex of coal gasification [PDF]
, 2017 Purpose. The objective is to generate thermal energy from basic segments of the energy-chemical complex formed on the basis of borehole underground coal gasification with determination of its operation modes. Methodology. The set engineering tasks were
Cáceres Cabana, E +4 more
core
The impact of forced closure on proppant distribution of hydraulic fracturing in shale formations
Deep Underground Science and Engineering, EarlyView.Research findings demonstrate that implementing forced closure within shale formations can remarkably mitigate proppant settlement, concurrently increasing the effective propped surface area from 29.74% to 38.68%. Abstract Forced closure is widely used in conventional oil and gas reservoirs to promote uniform proppant placement.
Tongxuan Gu +3 more
wiley +1 more source
Multi-indicator precursor warning method for gas-bearing coal rock fracture based on charge signals
Meitan kexue jishuTo address the challenge of accurate precursor charge signal warning for gas-bearing coal rock dynamic disasters, a comprehensive warning method based on multi-indicator charge signals for gas-bearing coal rock failure is proposed.
Xiaochun XIAO +4 more
doaj +1 more source
Distribution and genesis of mercury in natural gas of large coal derived gas fields in China
Petroleum Exploration and Development, 2019 The mercury content in natural gas samples from more than 500 gas wells in eight large gas bearing basins of China was tested, mercury release experiments on two coal samples from different areas were conducted, and the mercury content of 11 coal samples
Jian LI +4 more
doaj +1 more source
Shock and Vibration, 2021 Deep coal mining is seriously affected by a combined dynamic disaster of rock burst and coal and gas outburst, but the influence mechanism of gas on this combined dynamic disaster is still not very clear, which is significantly different from the single ...
Zuguang Wang +4 more
doaj +1 more source