Study on Top-Coal Loss and the Optimum Drawing Interval of Longwall Top-Coal Caving Mining

Fu, Qiang
Organization: International Conference on Ground Control in Mining
Pages: 6
Publication Date: Jan 1, 2002
ABSTRACT This paper aims to identify the main issues concerning top-coal loss and the optimum drawing interval of LTCC (Longwall Top-coal Caving) mining by underground tests and DEM (Distinct Element Method) modeling. By extracting a new roadway in the goaf of the mined LTCC Panel No.4318 in Wang Zhuang coal mine of Lu-an CMA (Coal Mining Administration), and underground observation of the distribution of loss coal and broken rock in different sections of the roadway, this paper analyses the composition and presents a 3-D distribution map of the loss coal in the exploration roadway. This study indicates that the DEM modeling of broken top-coal is reasonable and scientific as it can simulate the movement of broken coal and waste rocks and determine the optimum drawing interval of top coal.
Full Article Download:
(1337 kb)

Additional chapters/articles from the SME-ICGCM book Proceedings 21st International Conference on Ground Control in Mining

Pre-Driven Experimental Longwall Recovery Room Under Weak Ro
Longwall Mining-Induced Abutment Loads and Their Impacts on
Influence of Structural Stress Concentration and Structural
The NIOSH Shield Hydraulics Inspection and Evaluation of Leg
Study on Top-Coal Loss and the Optimum Drawing Interval of L
Stress Measurements for Safety Decisions in Longwall Coal
Re-Use of Rectangular Bolted Roadways in a Cover Depth > 100
Numerical Modeling of the Gob Loading Mechanism in Longwall
Deep Cover Pillar Extraction in the U.S. Coalfields
Evaluation of Pillar Recovery in Southern West Virginia
A Case History Investigation of Two Coal Bumps in the Southe
A Linear Coal Pillar Strength Formula for South African Coal
Anchorage Pull Testing for Fully Grouted Roof Bolts
Comparison of Some Aspects of Bolting Mechanisms Between Ful
Eclipse System Improves Resin Anchored Rebar Bolting
Design Considerations for Tensioned Bolts
Field Testing of the Fully Grouted Thrust Tensioned Bolts
Improvement in Pre-Tensioning of Strand Bolts in Australian
The Introduction of Roof Bolting to U.S. Underground Coal Mi
Support of Coal Mines in the United Kingdom
The Use of NDT Methods to Determine the Condition of Rockbol
Rockbolted Support of Retreat Longwall Gateroads at 1000m De
Roof Screening: Best Practices and Roof Bolting Machines
Numerical and Physical Modeling as Planning Tools for Rockbo
Stone Mine Design in Highly Fractured Rock
The Importance of Underground Stone Mine Roof Geology
Utilization of Ground-Penetrating Radar to Determine Roof Co
An Examination of the Loyalhanna Limestone's Structural
Highwall Stability in an Open Pit Stone Operation
Overview of Safety Considerations with Highwall Mining Opera
Highwall Monitoring to Combat Rockfall Accidents at Opencast
Seepage and Reinforcement Behavior of Grouting Into Slaking-
Floor Heave in Shallow Room-and-Pillar Mining
Analysis of a Stability Problem in an Underground Coal Mine
Comparison of Acoustic Emission and Stress Measurement Resul
Acoustic Scanner Analysis of Borehole Breakout to Define the
Estimating Rock Strengths Using Drilling Parameters During R
New developments with the coal mine roof rating
Application of geotechnical and geophysical parameters to im
Development of a Risk Rating System for Use in Underground C
Empirical and analytical design of large openings at a propo
Shear Mechanism for Mining-Induced Fractures Applied to Rock
Evaluating Techniques for Monitoring Rock Falls and Slope St
Developments in Sealant Support Systems for Ground Control
Stability Control of Clusters of Deep Openings Around Shaft
The Use of Pneumatic Stowing in Germany Considering Subsiden
A 3-D Semi-Analytical Method for Subsidence Prediction and S
Theory and Technology of Mining Subsidence Control by Grouti
Surface Subsidence Due to the Combined Effects of Undergroun