Exploration and Practice of Support Technology in Support Disassembly and Assembly Room for Close Coal Seam Groups
During the final withdrawal period of Ji16.17-23160 working face in No.4 Coal Mine of Pingdingshan Tian'an Coal Industry Co.,Ltd.,a large section support disassembly and assembly room needed to be constructed for the return airway.Due to the impact of close range coal seam mining,the Ji16.17-23160 air return roadway support disassembly and assembly room was located below the overlying Ji15-23140 machine roadway and Ji15-23160 gas tail roadway.Through on-site drilling and actual measurement of the distance between the upper and lower coal seams and the condition of the old roadway,the combined support method of shed and cable was optimized to address the impact of advanced support stress and surrounding rock conditions during the final mining period.The construction method was improved to achieve safe and efficient production as well as precise and effective support.The numerical simulation method was adopted for analysis and verification,providing reliable technical experience support for the construction and support technology of large section support dismantling and installation rooms during the final mining retreat period of complex working faces in close range coal seam groups.
close coal seam groupslarge sectionsupport disassembly and assembly roomcombined support with shed and cable
万方数据
维普
