Mining subsidence control by solid backfilling under buildings

ZHA Jian-feng^{1, 2, 3}, GUO Guang-li^{1, 2}, FENG Wen-kai³, WANG Qiang^{1, 2}

(1. Key Laboratory for Land Environment and Disaster Monitoring of the State Bureau of Surveying and Mapping,
China University of Mining and Technology, Xuzhou 221116, China;
2. Jiangsu Key Laboratory of Resources and Environmental Information Engineering,
China University of Mining and Technology, Xuzhou 221116, China;
3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,
Chengdu University of Technology, Chengdu 610059, China)

Abstract:Solid backfilling mining can reduce the buildings’ damage caused by mining greatly. The reduction of subsidence value, the slow advancing speed and the subsidence caused by backfilling body compaction are the main reasons that solid backfilling mining velocity decreases significantly. Based on the research of mechanism, some principles on subsidence control of solid backfilling mining under buildings were proposed. The equivalent mining height was designed according to the fortification criteria of buildings and their attachment structures, which enables the ground movement and deformation caused by mining to be less than the corresponding

Key words:solid backfilling mining; subsidence control; mining under buildings