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Ground Control Method of Using Roof Cutting Pressure Release and Energy-Absorbing Reinforcement for Roadway with Extra-Thick Hard Roof
Coal mining in the western region of China is often faced with extra-thick coal seams and extra-thick hard roof, where the roof is difficult to...
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Failure characteristics of thick hard roof stratum under hydraulic pre-splitting and its application in a coal mine, Dongsheng mining area
Due to the presence of the hard suspended roof, it cannot collapse naturally after the coal seam is mined. If the roof strata are suddenly destroyed...
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Study on the Method of Pressure Relief and Energy Absorption for Protecting Roadway Under Thick and Hard Roof
Thick and hard roofs are frequently encountered geological conditions during coal mining operations. In such conditions, the deformation of the...
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Numerical and Field Investigations of Rockburst Mechanisms Triggered by Thick-Hard Roof Fracturing
Mine tremors and rockbursts triggered by thick-hard roof fracturing are major problems in safe production of coal mines, and the corresponding...
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Moment Tensor and Stress Field Inversions of Mining-Induced Seismicity in A Thick-Hard Roof Zone
Coal mining in thick-hard roof areas leads to frequent high-energy seismicity and may even induce coal–rock dynamic disasters such as rockburst. It...
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An Optimized Destress Blasting Design for Hard Roof During Early Mining Stage: A Case Study
This paper presents an optimized destress blasting design for hard roof control during early mining stage of the mine. Experience of field operation...
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Strong strata behavior mechanism and roof cutting control of small pillar gob-side roadway in extra-thick coal seam
In Datong mine, the extraction of coal resources faces challenges due to strong strata behavior and significant deformation of gob-side roadways...
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Hard Roof’s 3D Breaking Characteristics for Longwall Faces Mined via Roof-Cutting Technology with a Chainsaw Arm Machine
Hard roof’s 3D breaking characteristics is vital for mining pressure control. However, the research concerning a longwall face that employs an...
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Research on Novel Method of Gob-Side Entry Retaining Under the Synergistic Effect of Roof Cutting and Roadside Filling in Thick Coal Seams
With the increase of coal seam mining thickness, the caving height of stope roof, the mining-induced stress increase, and the control difficulty of...
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Field application of directional hydraulic fracturing technology for controlling thick hard roof: a case study
Roof management in coal mines is a critical technology challenge to realize safe production. Dynamic disasters can be induced by a sudden collapse of...
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Evolution and management of thick-hard roof using goaf-based multistage hydraulic fracturing technology—a case study in western Chinese coal field
The mining-induced breaking of thick-hard roof is characterized by the microseisms and energy release. To preliminary control rock burst caused by...
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Evolution and control of overburden fracture in extra-thick coal seam mining with hard roofs: ground grouting sealing and case study
In the process of coal mining, the original state of rock strata is seriously damaged and a large number of fractures are produced. If the fracture...
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Determination and Engineering Practice of Unsupported Roof Distance for Rapid Excavation of Roadway with Thick and Hard Basic Roof
In order to determine the reasonable empty roof distance during roadway excavation, a mechanical model of the direct roof rock beam was established,...
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Importance of Fracturing Hard and Massive Overlying Strata for Complete Extraction of Thick Coal Seam — Case Studies
Engineering efforts need to be organized as per the rock mechanic conditions of the site for efficient underground extraction of a thick coal seam....
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Feasibility study on multi-seam upward mining of multi-layer soft–hard alternate complex roof
Multi-seam upward mining is of considerable importance to improve the resource recovery rate and realize waste-free mining. Taking the Dian** coal...
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Model test research and application on control method of cooperative pressure relief by directional roof cutting for roadways with strong dynamic pressure
To solve control problem of roadways with huge thick roof under the environment of strong dynamic pressure in coal mines, the causes of strong mine...
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Analysis of Lateral Roof Structure and Stability Control Technology in Island Working Face Mining Roadways
Considering the challenge posed by formidable mining pressure in the exploitation of island working faces, this study focuses on the control...
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Failure Mechanism and Movement Characteristics of Overlying Strata in Longwall Mining Face with Thick Aquifer
The failure and movement of overlying strata with a thick aquifer are closely related to the water-inrush pressure and the hydraulic coupling in coal...
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Mining Pressure Distribution Law and Disaster Prevention of Isolated Island Working Face Under the Condition of Hard “Umbrella Arch”
Aiming at the problem of safe mining of coal seam under the condition of hard roof, taking **agou coal mine as the background, the expression of coal...
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Roof cutting mechanism and surrounding rock control of small pillar along-gob roadway driving in super high coal seam
In view of the low recovery rate associated with wide coal pillar and the strong strata behavior associated with small coal pillar, the roof cutting...
