Analysis of underground space development and urban surface effect in Tangshan City

Mining cities in China have long faced pressures such as the occupation of urban land by waste discharge from mining areas, the harsh ecological environment, and the surge in unemployment. After years of exploration, the development of urban underground space is the best way to solve the above problems. Based on the geological condition and urban planning condition of Tangshan City, this paper put forward the concept of underground space development, and chose underground space waste storage and utilization methods according to local conditions. It analyzed the distribution of underground space in Tangshan City and its corresponding surface conditions, and calculated the volume of underground space as 9.1 × 10 7 m 3 ; proposed the concept of utilization efficiency of underground space, established the deformation model of underground space surrounding rock, and calculated the reasonable width of waste storage space. The width is about 60 m, and the space utilization efficiency should reach 82%; based on the field practice of the waste storage project, the measured space utilization efficiency is 73%, which is slightly less than the theoretical calculation value; Through the urban surface deformation and air monitoring, the underground waste storage project in Tangshan City is successful. The negative effect of urban ground is relatively small, and it is the best method suitable for the utilization of underground space in China's mining cities, and provides a theoretical basis for the development of urban underground space in China.