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Study on Reasonable Coal Pillar Width of Gob-Side Roadway Excavating with Multi-Layer Hard Roof in Western Deep Mine
Gob-side roadway excavating could not only notably reduce the loss of coal resources and improve the coal recovery rates, but also greatly mitigate...
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Application of Large-Scale Hydraulic Fracturing for Reducing Mining-Induced Stress and Microseismic Events: A Comprehensive Case Study
Roof strata control is crucial to production safety in underground coal mines. In this study, a field trial was carried out involving large-scale...
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Study and Application of Gob-Side Entry Retaining Formed by Roof Cutting and Pressure Relief in Medium-Thickness Coal Seam with Hard Roof
The technology of gob-side entry retaining by roof cutting can release mining pressure and reduce the deformation of roadway surrounding rock. In...
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Investigation of geo-mining green roof seismic energy balancing with resin bolting by Universal Drilling Machine: a novel energy-absorbing-based support system
Roof bolt reinforcement of stratified carboniferous and fragile strata is a popular way of roof support in underground mines. The manifestation of...
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Influencing Factors and Adaptability of Working Face Length in Deep Thick Coal Seam
In order to study the influencing factors of the working face length in deep buried thick coal seam, the 1,106,110 working face of Meihua**g Coal...
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Motion Mechanisms for Top Coal and Gangue Blocks in Longwall Top Coal Caving (LTCC) with an Extra-Thick Seam
Using longwall top coal caving (LTCC) in an extra-thick seam, many problems appear, such as large broken top coal blocks, frequent arch formation in...
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Study on Failure Behaviors of Roofs with Varying Thicknesses in Longwall Coal Mining Working Face
The stability of the roof in coal mining plays a crucial role in ensuring safe excavation. After coal extraction, the roof experiences complex and...
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Study of Effects of Hard Thick Roof on Gas Migration and Field Experiment of Roof Artificially Guided Pre-splitting for Efficient Gas Control
Due to high gas content, high geo-stress and complex geological conditions, gas disasters occur frequently in deep coal mining. The hard thick roof...
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The Mechanical Model on Surface Subsidence Caused by Backfilling Mined-Out Area on Thick Loose Loess Layer: Taking a Sedimentary Bauxite Mine as an Example
To study the influencing factors of surface subsidence by the backfilling of a mined-out area on thick and loose loess layers, a mechanical model on...
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Rockburst Risk Analysis During High-Hard Roof Breaking in Deep Mines
Mining operations continue to advance to greater depths to address the demand and supply of coal. However, deep mining occurs in complex and...
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Collapse behavior and control of hard roofs in steeply inclined coal seams
The control of hard roof collapse in steeply inclined coal seams is a difficult problem in coal mine operations. We used the Linsheng coal mine as...
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Non-repeated advance support technology: a fully mechanized caving face in extra thick coal seam of North China
The stability of tailgate plays an important role in the safety mining of working face. In the present work, a tailgate of Tongxin mine in north...
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Mechanism and Control of Water Inrush from Separated Roof Layers in the Jurassic Coalfields
Theoretical analysis, numerical simulation, and borehole drilling were used to study the mechanism of four large-scale water inrush events that...
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Predicting the Height of the Water-Conducting Fractured Zone in Fully Mechanized Top Coal Caving Longwall Mining of Very Thick Jurassic Coal Seams in Western China Based on the NNBR Model
The focus of China’s coal mining in recent years has shifted to western China, which has a fragile ecological environment. The Jurassic coal in this...
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Deformation Movement of Hugely-Thick Conglomerate Stratum in Longwall Top Coal Caving
In the process of longwall top coal caving, the deformation and movement of the overlying hugely-thick conglomerate stratum (HTCS) directly affects...
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Experimental Study on the Characteristics of Overlying Rock Movement in Mining Area
To reveal the characteristics of overlying rock movement in hard and thick volcanic rock mining areas, a typical volcanic rock occurrence was used as...
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A Hybrid Methodology of Rock Support Design for Poor Ground Conditions in Hard Rock Tunnelling
The design of rock support in hard rock tunnelling is often assisted by the use of empirical engineering rock mass classification systems. This has...
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Study on control of dynamic disaster induced by high-level ETHR fracture by ground fracturing
Fracture of high-level extra thick and hard roof (ETHR) above the coal seam is the main reason for the frequent occurrence of mine dynamic disasters...
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Fracture Mechanisms of Competent Overburden Under High Stress Conditions: A Case Study
High-intensity longwall top coal caving (LTCC) mining of super-thick coal seam in high stress conditions often leads to significant movement and...
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Risk assessment of roof water disaster due to multi-seam mining at Wulunshan Coal Mine in China
In the case of multi-seam coal mining, the earlier mined coal seam affects the engineering geological conditions of the subsequently mined coal seam,...
