Title: 'Double shell' control and support classification in deep roadways

Authors: Bensheng Yang; Huiliang Li; Lihui Sun; Wanbin Yang

Addresses: College of Resources, Hebei University of Engineering, Handan 056038, Hebei, China; Collaborative Innovation Center of the Comprehensive Development and Utilization of Coal Resource of Hebei Province, Handan 056038, Hebei, China; Engineering Technology Research Center of Coal Mine Construction of Hebei Province, Handan 056038, Hebei, China; Key Laboratory of Resource Survey and Research of Hebei Province, Handan 056038, Hebei, China ' College of Resources, Hebei University of Engineering, Handan 056038, Hebei, China; Collaborative Innovation Center of the Comprehensive Development and Utilization of Coal Resource of Hebei Province, Handan 056038, Hebei, China ' College of Resources, Hebei University of Engineering, Handan 056038, Hebei, China; Collaborative Innovation Center of the Comprehensive Development and Utilization of Coal Resource of Hebei Province, Handan 056038, Hebei, China; Engineering Technology Research Center of Coal Mine Construction of Hebei Province, Handan 056038, Hebei, China; Key Laboratory of Resource Survey and Research of Hebei Province, Handan 056038, Hebei, China ' Collaborative Innovation Center of the Comprehensive Development and Utilization of Coal Resource of Hebei Province, Handan 056038, Hebei, China; Shanxi Coal Mining Administrators College, Taiyuan 030006, Shanxi, China

Abstract: Based on the deformation and destruction characteristics of deep roadways, we developed a 'double shell' support theory, which applied both deep and shallow grouting along with bolts (cable) as the support shells. Through investigation of the support conditions of deep roadways in north China and referring to the Standard for engineering classification of rock masses, we summarised an optimisation table of 'double shell' support schemes in deep roadways. We also determined the parameters on the basis of the 'double shell' support theory, the indices of the rock grade and the mining depth of roadways. Considering the specific engineering condition of the water pump chamber of Xiandewang Coal Mine, we determined the grade of surrounding rock and established the 'single shell' (bolt + steel-mesh + cable + shotcreting + middle-deep grouting) support scheme by referring to the optimisation table. These efforts showed a good supporting effect and validated the applicability of the table.

Keywords: deep roadways; double shell support; supporting schemes; optimisation; surrounding rock control; deformation; destruction; grouting; bolts; China; rock grade; mining depth; steel mesh; cable; shotcreting; deep mining; mine supports; support strength; engineering classification; rock masses.

DOI: 10.1504/IJMME.2015.073046

International Journal of Mining and Mineral Engineering, 2015 Vol.6 No.4, pp.321 - 337

Available online: 13 Nov 2015 *

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