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2006•Coal Mining TechnologyRequires access

Numerical Analysis of Caving Characteristic and Reasonable Parameters Design in Combined Roof

Wang Xu-feng

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Abstract

The roof control design in mined field is the key to roof control and the movement rule of roof terrane is the basis of the roof control design.According to themaintainingprinciple of combined roof,the characteristic and rule of roof separation,caving and collapse of the mined face in 3 Coal of Liuquan Colliery by numerical simulation with RFPA2D.Thus,the rational working resistance of supports and supporting spacing in mining face are confirmed,the roof fall accidents of pressing,caving,pushing reduce farthest and good economic benefit is obtained.

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What this paper is about

The roof control design in mined field is the key to roof control and the movement rule of roof terrane is the basis of the roof control design.According to themaintainingprinciple of combined roof,the characteristic and rule of roof separation,caving and collapse of the mined face in 3 Coal of Liuquan Colliery by numerical simulation with RFPA2D.Thus,the rational working resistance of supports and supporting spacing in mining face are confirmed,the roof fall accidents of pressing,caving,pushing reduce farthest and good economic benefit is obtained.

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Available abstract

The roof control design in mined field is the key to roof control and the movement rule of roof terrane is the basis of the roof control design.According to themaintainingprinciple of combined roof,the characteristic and rule of roof separation,caving and collapse of the mined face in 3 Coal of Liuquan Colliery by numerical simulation with RFPA2D.Thus,the rational working resistance of supports and supporting spacing in mining face are confirmed,the roof fall accidents of pressing,caving,pushing reduce farthest and good economic benefit is obtained.

Key concepts: Roof, Coal mining, Mining engineering, Computer simulation, Engineering, Coal, Geotechnical engineering, Structural engineering

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