4.7 Article

Mechanism of Reducing the Bursting Liability of Coal using Liquid Nitrogen Cyclic Fracturing

Related references

Note: Only part of the references are listed.
Article Engineering, Environmental

Size effect analysis of remaining coal pillar on rock burst caused by fault

Pu Wang et al.

Summary: This study investigates the influence of mining activity on faults and rock systems, as well as the effect of different remaining fault coal pillars on rock burst induction. The results show that large remaining coal pillars have little impact on faults, while small remaining fault coal pillars significantly affect fault mechanical environment and movement. The study provides theoretical significance and guiding value for face layout, fault coal pillar remainder, and evaluation and prevention of rock bursts.

BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT (2022)

Article Energy & Fuels

Mechanical damage mechanism of frozen coal subjected to liquid nitrogen freezing

Lei Qin et al.

Summary: Cracking low-permeability coal seams with anhydrous liquid nitrogen can enhance coalbed methane extraction efficiency, but freezing variables significantly affect the mechanical properties of coal, with an increase in freezing cycles leading to a decrease in mechanical strength.
Article Engineering, Geological

Effect of liquid nitrogen cooling on mechanical characteristics and fracture morphology of layer coal under Brazilian splitting test

Peng Hou et al.

Summary: In this study, the effects of liquid nitrogen cooling on the internal structure of coal and the mechanical properties and fracture morphology of bedding coal were investigated. The results showed that LN2 cooling damaged the micro-structure of coal and reduced its mechanical properties, with the degree of weakening dependent on the bedding direction. Additionally, LN2 cooling increased the ductility of coal and induced longer and more complex fractures.

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES (2022)

Article Engineering, Mechanical

Research on roof damage mechanism and control technology of gob-side entry retaining under close distance gob

Hongyang Liu et al.

Summary: This study investigated the failure mechanism and control technology of gob-side entry retaining in short-distance coal seam at Panel #11426 of Xieqiao Mine. Various support methods were proposed to control the surrounding rock of gob-side entry during roadway excavation and mining, resulting in successful engineering results.

ENGINEERING FAILURE ANALYSIS (2022)

Article Engineering, Geological

Effect of Stress Anisotropy on the Efficiency of Large-Scale Destress Blasting

Isaac Vennes et al.

Summary: Large-scale panel destressing is a rockburst control technique aimed at reducing pillar burst proneness by creating a stress shadow in the ore pillar to be mined. This paper discusses the impact of high mining-induced stress anisotropy on the efficiency of destress blasting, using Phase 3 destress blasting results at Copper Cliff Mine as a case study.

ROCK MECHANICS AND ROCK ENGINEERING (2021)

Article Engineering, Environmental

Rock mass watering for rock-burst prevention: some thoughts on the mechanisms deduced from laboratory results

Xin Cai et al.

Summary: Water spraying or injection into rock mass is an effective method for preventing rock bursts in deeply buried hard rock engineering projects. Experimental results indicate that the presence of water significantly weakens the strength and energy storage capacity of rocks, leading to gentler failure patterns and reduced dynamicity. Additionally, a simple mechanical model was established to illustrate the local stress regulation by water penetration.

BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT (2021)

Article Materials Science, Multidisciplinary

Influence of Steel Fiber on Durability Performance of Concrete under Freeze-Thaw Cycles

Dong Li et al.

Summary: Steel fiber dosage has a significant impact on the durability properties of concrete in cold regions and can be verified through testing; there is a clear relationship between frost damage and freeze-thaw cycles in steel fiber reinforced concrete; increasing steel fiber content helps improve the frost resistance performance of concrete.

ADVANCES IN MATERIALS SCIENCE AND ENGINEERING (2021)

Article Energy & Fuels

Experimental investigation on the breakdown behaviours of sandstone due to liquid nitrogen fracturing

Chengzheng Cai et al.

Summary: Liquid nitrogen (LN) fracturing has been proven to be an efficient technology for developing unconventional gas resources. Experimental results showed that increasing the initial rock temperature reduces the breakdown pressure of sandstone, while under cryogenic conditions, the fracture complexity is significantly improved despite a potential increase in breakdown pressure.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2021)

Article Chemistry, Multidisciplinary

Differences of Mechanical Parameters and Rockburst Tendency Indices between Coal and Non-Coal Rocks and Modified Rockburst Tendency Classification Criteria for Non-Coal Rocks

Kun Du et al.

Summary: Rockbursts are dangerous dynamic disasters in underground coal mines and other rock engineering projects. The classification criteria for bursting liability indices are reasonable for coal but not yet mature for non-coal rocks. It is important to establish a comprehensive evaluation method to assess the bursting liability of rocks, as coal and non-coal rocks have significant differences in mechanical parameters and rockburst tendency indices.

APPLIED SCIENCES-BASEL (2021)

Article Engineering, Geological

Experimental Study on the Damage and Cracking Characteristics of Bedded Coal Subjected to Liquid Nitrogen Cooling

Menglin Du et al.

Summary: Liquid nitrogen cooling can cause significant cracking damage in coalbed methane reservoirs, leading to deterioration in mechanical properties and easier cracking and fragmentation. The failure mode after cooling varies at different bedding angles, with a transition to tensile failure at a 60 degrees angle.

ROCK MECHANICS AND ROCK ENGINEERING (2021)

Article Acoustics

Study on Reasonable Layout of Upper Protective Layer for Prevention Rock Burst under Coal Seam Group with Close Quarters Conditions

Hui-Wu Jin et al.

Summary: The study focused on the reasonable layout of upper protective layer for preventing rock burst under close quarters conditions in coal seam group. By examining the stress environments under the upper protective layer, it was found that the overall stress was good on the upper side but bad on the lower side. The study provided a new guidance for similar geological conditions.

SHOCK AND VIBRATION (2021)

Article Metallurgy & Metallurgical Engineering

AE waveform characteristics of rock mass under uniaxial loading based on Hilbert-Huang transform

Li Xue-long et al.

Summary: The study utilizes the Hilbert-Huang transform method to analyze AE waveforms, obtaining detailed structural characteristics of coal rock masses at different loading stages related to damage. The results show changes in energy distribution among different frequency components and indicate the main energy concentration areas in each stage.

JOURNAL OF CENTRAL SOUTH UNIVERSITY (2021)

Review Mining & Mineral Processing

Gas-dynamic phenomena caused by rock mass tremors and rock bursts

Stanislaw Wasilewski

INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY (2020)

Article Energy & Fuels

Investigations on the mechanism of the microstructural evolution of different coal ranks under liquid nitrogen cold soaking

Shumin Liu et al.

ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS (2020)

Article Engineering, Geological

A new seismic-based strain energy methodology for coal burst forecasting in underground coal mines

Wu Cai et al.

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES (2019)

Article Construction & Building Technology

Rockburst characteristics in syncline regions and microseismic precursors based on energy density clouds

Guifeng Wang et al.

TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY (2018)

Article Energy & Fuels

Interpretation of the extent of hydraulic fracturing for rockburst prevention using microseismic monitoring data

Quanjie Zhu et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2017)

Review Engineering, Multidisciplinary

Opportunities and Challenges in Deep Mining: A Brief Review

Pathegama G. Ranjith et al.

ENGINEERING (2017)

Article Energy & Fuels

Feasibility of reservoir fracturing stimulation with liquid nitrogen jet

Chengzheng Cai et al.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2016)

Article Energy & Fuels

Experiment of coal damage due to super-cooling with liquid nitrogen

Chengzheng Cai et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2015)

Article Energy & Fuels

Experimental study of the effect of liquid nitrogen cooling on rock pore structure

Chengzheng Cai et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2014)

Article Engineering, Geological

Long-hole destress blasting for rockburst control during deep underground coal mining

Petr Konicek et al.

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES (2013)

Article Construction & Building Technology

Deep-hole directional fracturing of thick hard roof for rockburst prevention

Hu He et al.

TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY (2012)

Article Construction & Building Technology

Comprehensive prediction of rockburst based on analysis of strain energy in rocks

JA Wang et al.

TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY (2001)