Abstract
Intensive and continuous mining of coal resources in China implies their gradual exhaustion, especially in the eastern regions. While some mines face closure, others have to extract residual coal resources under buildings, water bodies, and industrial sites. Thus, safe and efficient mining of the residual coal resources requires innovative techniques, which would account for the particular site’s geological conditions. In this study, two schemes of roadway mining with cemented paste backfilling (RMCPB) and strip mining are put forward. After analyzing the type, construction, and protection standard of the buildings, the probability integration method and the prediction model are used to assess the surface subsidence and deformation. The research results show that both schemes can control the surface deformation to a certain extent, but RMCPB combines the advantages of a high coal recovery rate and disposal of gangue waste. According to the surface subsidence predicted and measured data, the RMCPB method can effectively control the surface subsidence, deformation, and buildings’ safety. It also yields significant economic and environmental benefits.
Highlights
About half of the world’s coal is produced in China, mainly (90%) by underground mining
To ensure the stability of surface residential buildings, signal towers, and high-voltage line towers, scheme I of roadway mining with cemented paste backfilling (RMCPB) is recommended to achieve safe mining under the buildings
0.00 scheme, coal resources under buildings can be maximally utilized, and a large volume of abandoned waste gangue can be backfilled into the goaf to control surface subsidence. is scheme allows one to achieve economical, ecological, and environmental benefits listed in Table 4, in comparison to strip mining
Summary
About half of the world’s coal is produced in China, mainly (90%) by underground mining. Environmental problems in coal mining, including surface subsidence and solid waste accumulation affected by multiple mining, become very topical [4,5,6]. The total area of coal mining-induced surface subsidence in China has reached 700,000 hm2 [7]. An effective technique for controlling surface subsidence with simultaneous disposing of the resulting solid waste in coal mining is urgently required to mitigate these problems. Advances in Civil Engineering the risk assessment and prevention of surface subsidence in deep multiple coal seam mining under dense above-ground buildings using numerical simulation and surface subsidence prediction methods in solid backfill mining. E prediction model of the probability integration method is proposed to study the surface subsidence and deformation during the mining. E prediction model of the probability integration method is proposed to study the surface subsidence and deformation during the mining. e surface subsidence predictions and field measurements are compared, and conclusions on the most lucrative mining scheme are drawn
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
