coal seam

Most of it comes from off the coast of Western Australia, and most of this, like the coal-seam gas, is destined for Asia.

The top-coal in the front of the wall appears the failure area in the effect of the abutment pressure that spreads over the coal seam.

The 3D model of coal seam was constructed by building the corresponding relationship between the top TIN and the bottom one.

The elastic wave reflection method is one of the effective methods of detecting the thickness of the top coal seam.

gateway in inclined coal seam is difficult to maintained mainly due to its location in a remarkably anisotropic environment.

The sublevel caving mining of steep coal seam as an economic, safe, efficient mining method are widely used in steep thick coal seam mining.

"Pressure relief antireflective" technology is to improve the soft low-permeability coal seam gas extraction rate in an effective way.

Above achievements can be rationally used to prevent and control roof water inrush and protect water body in shallow coal seam mining.

The practice has proved that IR imaging detecting technique can be used to preventing and controlling working of hidden fire of coal seam.

Coal seam gas is commonly referred to as the gas, the coal mining is a kind of disaster gas.

It can be used as an assistant index of coal seam outburst risk assessment, and also can be used in gas permeability study of coal seam.

As the soft coal seam is high gas content and low permeability. it has been difficult and key for the coal seam gas extraction.

The current coal seam gas occurrence is the result of coal seam with complex geological evolution.

The method is simple and reliable in calculation, and is useful for predicting distribution characteristics of coal-seam gas content.

Practices prove that injecting water to coal seam is an effective method, advanced ways and experiences are provided for other mining area.

The unit forecast method is applied to forecast quantitatively the complicated degree of small structure in main coal seam.

The measures that should be adopted in water-pouring for coal seam with worse penetrability, hygroscopicity and wettability are expounded.

Feasibility Study of Utilizing Coal Seam Gas to Construct "Distributed Energy System"

The structural deformation is the principal geological factor that affects the thickness variation of coal seam on a mine field scale.

Artificial neural network technology is applied to water inrush forecast of coal seam floor of Feicheng mine area.

Essential way of solving the gas drainage problem of low permeability coal seam is to increase coal seam permeability.

Results of this research can provide certain references to coal seam infusion and gas suction in this region.

Reviewed are coal seam gas recovery, separation and utilization technologies and introduced are new fields of coal seam gas application.

Researches on mechanism of coal adsorbing water provide the theoretic foundation for taking the measures of promoting wetness of coal seam.

A fast-withdraw technology and relative safety processes of fully mechanized caving face in steeply -inclined coal seam are introduced.

Outburst prevention technique of excavating in coal seam will be directly concerned colliery safety production and excavates taking over.

The research results provided stable theoretical basis for high gas coal seam fully-mechanized face gas dynamic disaster control.

Its main mineable coal seam belongs to very thick coal seam. The coal seam texture and coal rank configuration are generally very complex.

The difference of caving difficulty degree of coal seam is the base of caving coal method at high, medium and low position.

The mechanism and control of coal seam with soft coal, roof and floor roadway floor heave is a difficult problem in mining subject.

This paper goes further into the blast-winning technology of the composite coal seam face.

It is understood that more than 45 degree angle in inclined coal seam is called.

And it is with many factors, including coal seam permeability is one of the factors.

This text mainly introduces the main problem existing in the thick coal seam layering mining and the method to solve it.

How to increase the permeability of coal to effectively increase gas extraction rate of the soft coal seam is a serious problem.

This paper adopts small-size indoor experiment of hydraulic fracturing to measure the coefficient of water-resisting of coal seam floor.

The concrete construction methods and effects of mining technology in the middle thick coal seam are introduced.

The basic characteristics's mechanical analysis model which in angle of coal seam zone have established.

It is fit for modem mining face with high output, large equipment capability and high reliability in coal seam with stable occurrence.

Introduced the geologic background of the Coal-Ge, and the distribution of Germanium in the coal seam.

The development of this compound technique of perforating in fracturing blasting of coal seam showed a very promising applicable future.

The method of gas drainage contains: self coal seam gas drainage, near coal seams gas drainage, and goaf gas drainage.

Firstly, attributes were extracted from the reflection of the coal seam.

The studies also show that magnetized water has a good application prospect in coal seam infusion.

The main key stratum that is made up of the hard stratum covering over the coal seam has a great influence on rock burst.

This paper is a guide to precise determination of the content of coal seam methane.

The II3123 face is a light type caving face of three-soft coal seam. the roof is cracked, sloughing and roof fall often occur.

Water-coal mixture burst is a new mine disaster in exploiting steeply inclined thick coal seam mining.

Therefore it is unscientific that coal seam spontaneous combustion was caused by the silicified coal spontaneous combustion.

This paper summarizes the characters of mining roadway layout adopted in thick coal-seam mining in Xinglongzhuang coal mine .

The Middle and Lower Jurassic with thick coal seam is widely distributed in Northwest China.

However, with the extension of mining depth, the distribution of soft coal seam has been expanding.

Under gassy coal seam condition, the full-heading development is employed. Because of the fast heading a high rate of gas emission arises.

Spontaneous combustion of a coal seam was mainly caused by oxygen in leaked air.

high density electric surveying to define coal seam strike extending.

In coal mine production, along with the exploitation of coal seam, usually gush methane.

According to the coal seam gas content formula, the gas pressure in different freezing temperature was calculated.

Long- wall double working- face combined winning technical practice in faull lager small section coal seam.

We have thought that should improve the height of subsection properly in the coal seam with bigger coal seam inclination.

Henan Provincial Coal Seam Gas Development and Utilization Co.

The valgus leg U-shaped tent support is adopted and arranged the middle of coal seam when the impact is medium.

The coal seam in Daming No. 1 & No. 2 Mines, Tiefa Mining Administration is overlain by a rich water bearing Quaternary sand layer.

So it is feasible used the logging data to forecast coal seam gas content, and the applied value is enhance further.

Upper-lower coal seam groups are focused by wrinkles and deflections rule time and funds are saved efficiency of production is raised.

Hereon, the low limit of single well output of coal seam gas in Tuha exploration area is discussed from the view . . .

This paper focuses on gas seepage, gas emission and gas outburst in coal seam.

The bigger values of microhardness and microbrittleness is, the more bump-prone property the coal seam has.

The coal seam methane is a source of coal mine gas calamity, and also a clear energy resources.

The gas distributed rule of coal seam is the base of preventing gas hazard.

coal seam inclinations are presented in this section.

This paper provides reliable academic and practical gist for reasonably remain waterproof coal pillar when mining 13 1 coal seam.

Coal seam is a kind of dual porosity system reservoirs, and methane will be contained in matrix pores and flowed by fracture.

This business, known as coal-bed methane or coal-seam gas, first took off in America, but has now spread.

150 times of water bursting had happened since the lower coal seam was mined in 1965.

The roof of the 2 1 coal seam in Gaocheng area of Dengfeng Coal Field is constitute of tectonite rock formed by gliding.

The ground subsidence caused by steep coal seam mining is a severe geological hazard in mining area.

Whereas the character of roof's movement and falling caused by coal seam is shallow in Shen-dong mine district, the workface advance. . .

The hot new product in Queensland, though, is coal-seam gas.

Mining Practice in Steep Coal Seam under "Grey Hat"

Based on the #403 face entry of Guandi coal mine, the characters of steeply inclined coal seam entry maintenance is introduced.

A coal seam or a coal seam group constituted independent depositional system peat swamp system.

From then there aren't any mining methods that can content to various unstable coal seam in the world.

The greater part of No. 9 coal seam is menaced by pressure water in T aiyuan Xiyu Coal Mine.

The main coal seam of 8 layers in the first paragraph, the secondary could be mining coal seam 2 and 5 in the second paragraph.

There are three coal mines in Xin'an Coalfield. The Shanxi group irregular(2-1) coal seam has soft roof, soft coal and soft floor.

Control the roof im mining overall 5 height coal seam under the 'two hard'

Therefore we must evaluate the character of calcareous rock water about the 10 main coal seam.

Cnooc has also agreed to buy 5% of BG's interests in certain coal-seam gas tenements in Queensland's Surat Basin.

Combining with the production data, grey GM(1, 1)model is used to predict deep thickness of coal seam in Moxinpo.

Combined 25 Fai green rock walls altogether , there are 20 in the coal seam recoverable range among them.

Combined 25 Fai green rock walls altogether , there are 20 in the coal seam recoverable range among them.

Introduces the mechanical property of rock in 10-2#coal seam and roof and floor of Ciyaogou coal mine.

Combined with practice, the paper studied the coal seam 12_1.

North section in coal seam No. 11 of panel 307 in Sitai mine was not only destroyed by mining of little mine, but also affected by faults.

Steep coal seam of our country is rich, and a lot of mines.

Analysis on Forming of the Top Loosing Coal of Drift Along the Low and Spontaneous Combustion Characteristic in Thick Coal Seam

The sandstone percentage in given range is not used to evaluative index, which effects to methane content of coal seam;

Study on Coal Seam Roof Gas Drainage from the Strike of Annular Fracture Areas by the Long Drill Method

Gallium Accumulation and Geological Controls in Coal Seam and Its Floor from Liangshan Formation, Kaili, Eastern Guizhou, China

Experimental Study on Bolting-Grouting Techniques for Reinforcing Soft Rock Roadways in Upper Coal Seam Over-the-Roadway Extraction

Bolting Used for Thick Coal Seam Mining and Caving Roadway Firstly

Selection, Matching and Mining Technology of Light-duty Fully Mechanized Caving Equipment in Inflammable Coal Seam

Application of infrared ray detective technique at the early alarm of coal seam spontaneous combustion

Application Study of Hydraulic Rarefaction Coal Seam Shallow Hole Water Infusion Device

Study of dynamic pressure mechanisms and laws of fully mechanized sub-level caving in extremely thick coal seam

Study of Analog Simulation of Stress Distribution Rules in Coal Seam of Full-mechanized Sublevel Caving

Applying Gassy Geology Analyzing Method to Make Comprehensive Study of Coal-seam Gas Content

Roadway layout of outward intervening mining mode striding over the transportation tunnel in near distance coal seam

Roof Maintenance of "Three-soft" Coal Seam Working Face End of Fully mechanized Coal Winning Technology with Caving

Study of hydrochemical characteristics in Karst water of coal seam floor in the Mining District of North Anhui

Compositive precaution technology of gas in upper corner in fully mechanized mining work face in "two-hard" coal seam

Numerical simulation of water injection into coal seam through long drill hole and determination of its reasonable parameters

The General Situation of Coal Seam Gas Resources in Yunnan Province

Testing study of methane drainage by bore and hydraulic-cutting seam from low permeability coal seam

Early-predicting Technology for Coal Seam Spontaneous Combustion and Its Utilization

Attempt to revolved cave in the high inclined fully mechanized mining face with the "three soft" coal seam condition

Research on Extraction of Multiple Protective Seams of a Coal Seam Group against Outburst

Research on the weakening technology and the drawing law of top-coal in western shallow-reserved hard and thick coal seam

Experimental research on preventing and controlling technique for spontaneous combustion of coal roadway in combustible coal seam

Applied Study of Secondary Support Technique for Development Roadway in Soft Coal Seam

High Resolution Seismic Prospecting Technology Used in Coal Seam Subsided Column

Influence of the moving law of diabase on the reserve of coal-seam gas in Fuxin Coal Mining Area

Unsteady Percolation Flow of Coalbed Methane Through Deformed Coal Seam

The approach of improving the coal recovery rate of comprehensive mining caving coal in severe inclined think coal seam

Cause of a Coal Seam Spontaneous Combustion and Its Control

Supporting Techniques of Preparation Roadway for Fully Mechanized Sublevel Caving in the Easily Spontaneous Combustion Coal Seam

Crack unstable evolutive regular of steeply dipping coal seam due to synthetical mechanization top coal caving

Theory and Practice of Gas Drainage in Fully mechanized Caving Working Face of Very Soft Inflammable and Very Thick Outburst Coal Seam

Analysis and Prevention on Water Bursting at Unstable "Three-soft" Coal Seam Under Complicated Hydrogeological Conditions

Countermeasures Analysis of Fire Fighting Technology when Exploiting or Mining Easy Spontaneous Combustion Coal Seam

Practice of Using Deep-hole Presplitting Blasting Technology to Drainage Methane from Extremely- thick Coal Seam with Low Permeability

Relation of Surface Geologic Phenomenon with Coal Seam Extraction and Its Application

Methane Drainage Technology Used in Fully-mechanized Faces of Coal Seam with High Outburst risk

The fall protection and antiskid measures of the fully mechanized caving equipment in the large - angle coal seam longwall

The Analysis on Roof Control of Working Face of Medium-thickness Coal Seam Comprehensive Mechanized Top Coal Caving Method

Application of Unloading Pressure Protection and Anti-Burst Technology in Mining Horizontal Slice of Sharp Inclined and Very Thick Coal Seam

Study on Prediction Method of Coal Seam Thickness Using Seismic Data Frequency Domain and Its Application

Technology of Positive Cutting Through Coal Seam in Gentle Inclined, Unstable, "Three-soft" and Outburst Coal Seam under Slide Tectonics

Deformation Rule of Protected Coal Seam Exploited by Using the Long-Distance-Lower Protective Seam Method

Abutment pressure distribution law of fully-mechanized face in soft, thick coal seam

Causes Analysis for Coal Seam Prone to Spontaneous Combustion in Yima Coal Field and Practice of Comprehensive Preventive Technology

Cutting Resistance Test of Hard Coal Seam and its Difficulty Degree of Digging Research

Application study of geostatistics to predicate washout zone in coal seam

Current situation of the fully mechanized mining technology relating to large cutting height and thick coal seam

Analyzing falling crack failure of overburden strata of shallow coal seam and its control method

Application and Study on Preparation Roadway Supporting Technique of Stress-concentrated Swell Outburst Coal Seam

Mining Method of Crossing Over Roof Fall Area of the Upper Assist ant Tunnel at "Three Soft" Coal Seam Combined Mining Face

Pressure character in caving steep-inclined and extremely thick coal seam with horizontally grouped top-coal drawing mining method

Application of fully mechanized caving mining technique in deep inclined thick and spontaneous combusted coal seam in Huating Mine

Characters of fault in coal seam appeared in the reconstruction image of two gateways sound wave CT system

Orthogonal Design Optimal Method of the Numerical Theory for the Coal Seam Injection Parameters

Comprehensive Controlling Coal Seam Spontaneous Fire when Dismantling in Fully-mechanized Caving Roof Faces

Probing into Methods of "Three Soft" Instability Coal Seam Uncovered in Station with Great Danger of Outburst under Sliding Structure

Practice of Prevention of Spontaneous Combustion in Coal Seam liable to Combustion during Mining of Fully -mechanized Caving Roof

Study on reproducing roof strata and the equipment forming a complete set of thick coal seam slicing

Measuring and Analyzing Oxygenation Law of Coal Seam in the Period of Withdrawing in Fully-Mechanized Sublevel Caving Faces

Influence of Ancient River Erosion on Coal Seam and Its Application in Mining Geologic Working

Gas Outburst Prevention Technology in High Gassy Gateway Heading Face of "Three Soft" Instability Coal Seam

Technology for Comprehensive Gas Treatment in Spontaneously Inflammable and Specially Thick Coal Seam

The issues Worthy Attention in Prevention and Extinguishments of Underground Fire of Thick Coal Seam throw Yankuang Group's Practice

Practice of Fully-mechanized Coal Winning Technology for Thick Coal Seam Prone to Spontaneous Combustion in Working Face with Caving

Coal seam characteristics controlling combined caving technology

Determination of the scheme and parameters of coal seam water injection in large-scale full-mechanized caving

Research on High Production and High Efficiency Full Mechanized (Caving) Mining Technology in Steeply Inclined Coal Seam

Discussions on mechanization extracting of the thin coal seam which contains stone in Yanzhou Mining Area

Pre-stressed Full Cable Anchor Support Technique for Roadway of Fully Mechanized Caving Face of Loose Thick Coal Seam

Treatment Method and Gas Emission Regulation During the Periodic Weighting in Gas Outburst Coal Seam

Numerical Simulation of the Air Leakage in the Bedding Plane of Gob in Shallow Coal Seam

Practice on Preventing Coal Seam Spontaneous Combustion in Flammable Coal Seam by Using Fully-mechanized Coal Winning Technology with Caving

Prevention and Treatment for Methane and Spontaneous Combustion in Gassy Coal Seam Fully - mechanized Roof Caving Faces

Forward Modeling of Relationship Between Coal Seam Thickness and Seismic Attributes of Amplitude and Frequency

The developing regulation of laiwu coal field magma invading rock and its influence to coal seam

Exploration Method for Underground River Enrichment Zone in Changxing Limestone Formation and Mining Test of Coal Seam

Integrated Gas Drainage and Winning Technology for High Gassy Coal Seam under Complicated Geologic Conditions

Research on Reasonable Pre-draining Time of Gas in Coal Seam in Jiaozuo Mining Area

Experiment Test of Spontaneous Combustion Character Parameters of Flammability Coal Seam

Drilling Construction Technique in Complicated Rock Stratum and Incompact Coal Seam in Ningxia Coalfield

Ground pressure behavior in top coal caving face supported by light hydraulic prop under condition of steep inclined thick coal seam

Application of Single Hydraulic Supports with Suspension Type of Force Plunger in Medium Thick Coal Seam with Big Inclination

Pore Structure Characteristics of Coal Seam in Magmatic Rock Erosive Area and Its Effect on Gas Storage

Gas extraction techniques and movement properties of long distance and pressure relief rock mass upon exploited coal seam

Reasonable Parameters Confirmation of Full-mechanized Caving Mining Face in Medium-hard and Extremely Thick Coal Seam

draft development plans and policies on coal exploitation, coal seam gas, coal processing into clean energy products;

Preliminary Probe into Spontaneous Combustion Mark Gases on Main-Mining Coal Seam in Pingdingshan Coal Industry Group

Application of combined supporting in support removing supporters during "three soft" heavy coal seam mining

High productivity and high efficiency practice of economic fully mechanized mining in deep-seated middle thick coal seam

Observation study on developing characteristics of overlying strata failure zones of inclined coal seam in deep mine

Study and Application on Increasing the Efficiency of Dust Falling by Coal Seam Infusion with Physicochemical Method

The optics-elastic simulation study on the stress of the surrounding rock of the coal face in multi-coal seam mining

Analysis of Support Ways of Roadway and Its Surrounding's Control Effect in Three-Soft Coal Seam

Experimental Study of Incubation Period of Coal Seam Spontaneous Combustion

Technological Management of Grouting Reconstruction of Coal Seam Floor Within Rich Aquifer Region

Discussion on mechanism of surface collapse pit and dimensions of obstructive ridge for steep inclined coal seam mining

Study on Drainage of Relieved Methane from Overlying Coal Seam Far Away from the Protective Seam by Surface Well

Feasibility Discussion of Super Long Spontaneous Combustion Coal Seam's Sub-level Caving Mining Technology

Critical oxygen concentration indictor of coal spontaneous combustion at the 3rd coal seam of Dongtan Mine, Yanzhou, Shandong Province

Experimental Study of Water Infusion Technology for Special Coal Seam

Application of Underground Tri-electron Section Method in Detecting Gob with Roof Seeper in Steeply Inclined Coal Seam

Igneous Rock Features and Its Influence on Coal Seam and Coal Quality of Huanghebei Coalfield, Shandong Province

Parameters variation character Among Coal Seam Methane Content Determining

Study on Surrounding Rock Supporting Pressure of Floor Roadway During Short Distance Coal Seam Combined Mining

Application of Geologic CT and Exploration Boring Techniques in Mining of Pressure Water-bearing Coal Seam of Fushan Mine

Study of floor water hazard controlling for steep A coal seam group mining

Inquiring Into Gas Emission Law from Top Slice during Slice Mining of an Extra- thick Coal Seam

Techniques and practice of longwall with top caving mining in soft and combustible coal Seam with steep dip, extra-thickness

Stability analysis and control measures of powered supports in greater inclined full-mechanized coal seam

Fixed Equipment for Drive End Unit of Scraper-conveyor Used in Thin Coal Seam Coal Faces

Cross-cut Coal Uncovering Technology in Flat, Unstable, "Three-soft" and Outburst Coal Seam Under Slide Tectonics

Numerical simulation on stress field distribution in partial transformation area of coal seam height

Comprehensive Preventive Technology for Coal Seam Prone to Spontaneous Combustion in Yima Coal Field

Research on Full-mechanized Coal Winning Technology in Large Mining Height and Extra-soft Coal Seam with Double-outburst

Fire Prevention and Extinguishment Technology of Driving Roadways in Combustible Coal Seam

The feasible demonstration and the beneficial result assessment of improving the coal seam extraction upper limit

The Startup Status and Soft Startup Application of Thin Coal Seam Scraper Conveyor in Fully -mechanized Coal Winning

The Application of Wavelet Singularity Analysis to Signal Processing in Thickness Detection of Coal Seam

New Technique for Preventing Top-coal Spontaneous Combustion during Exposing Coal Seam in Crosscut Floor

Analysis of gray association degree is applied in coal seam correlation in Lengshuijiang mining district

Brief Discussion of Spontaneous Combustion Prevention and Control in Fully Mechanized Caving Face of Mediurm-thick Coal Seam

Discussion on Technology for Air Control of Fully-mechanized Coal Winning in Coal Seam to Spontaneous Combustion

Gob Fire Prevention and Control Technology in Extensive Long Caving Blasting Face in Combustible Thick Coal Seam

Gas Bursting Rule and Comprehensive Prevention of Full-mechanized Caving Mining in Extremely Thick Coal Seam

Availability Method of Rib Spalling and Roof Fall Prevention Under Dust Suppression by "Three Soft" Coal Seam Water Infusion

Study on Utilizing the Hydraulic Cutting Seam Technology to Improve the Low Gas Permeability Coal Seam and Gas Drainage

Exploring the new Unmanned Coal Face Mining Approach of Extremely Thin Coal Seam to Improve Resources Recovery Ratio

Characteristics and Prevention of Spontaneous Combustion in Full-Mechanized Top Caving of Coal Seam

High Productivity and Efficiency Measurment in Working Face of Thin Coal Seam with Blasting

Application of the light support in the large dip angle extreme thick coal seam recovery

Analysis about Reasonable Wrong Part of Small Distance Coal Seam Excavating Together

Technology of exploiting coal seam along one-way direction in fully-mechanized mining face with large mining height

Analysis of Comprehensive Prevention Technology of Gas Burst in Top-Coal Caving Mining of Extremely Thick Coal Seam

Experimental Study on Outburst Proneness Coal Seam of Meso Character and Crack Destabilization

Critical catastrophic analysis of instability of combinatorial key strata in shallow coal seam

Action relation between the thin coal seam support and surrounding rock

Numerical Simulation Research on the Overpressure History of Upper Main Coal Seam in Central-south Qinshui Basin

Model Test Two-Stage Underground Coal Gasification in Counter Directions with Gently Inclined Coal Seam

The Simulation Study of Hard Parcels Distributed in Coal Seam

Effect Analysis of Applying Narrow Coal Pillar to Protect Roadway in "Three soft" Coal Seam and Countermeasures

Application of Nitrogen and Additive for Fire Extinguishing in Thick Coal Seam Prone to Combustion Tendency

Bias W-type Ventilation in Short-interval Coal Seam Group Face and Its Application

Mine Electrical Method Exploration for Floor Water Bursting Area of Overgrown Faults Mining Face in Thin Coal Seam

Dynamic modelling technology of coal seam and its application

Experiment research on non-chain-pillar mining technology on inclined coal seam across contiguous rise

Application of Deep-hole-loosing Blasting Technology to Roadway-heading in "Double-emission" Coal Seam

Methods for Coal Seam Roof Stability Evaluation by Coalfield Geological Exploration Data

Full-mechanized Caving Mining Technics and Application in Geng Group Coal Seam in Pingdingshan Mining Area

Practice of Support in the Air Return Roadway and the Loose Coal Seam Working Face with High-Methane

Optimization Design of Mining Technique in High Outputs and High Efficiency Mining Face in Medium Thick Coal Seam

Quantitative study and classification standards of difficult mining coal seam

Application Research of Preventing Rock-bursting with Water-pouring in Steeply Inclined Coal Seam

Researches on No. 9 coal seam and its roof and floor lithologic in the eastern part of Jincheng coal mining area