Established the Fuzzy matter-element Model for Comprehensive Evaluation of the stability of coal mining subsidence. Analyzed each factor of the stability of coal mining subsidence, and constructed Fuzzy Comprehensive Evaluation of coal mining subsidence. With Fuzzy matter-element theory, make the stability of coal mining subsidence as matter element thing, Application of the things of the evaluation criteria and the fuzzy values to construct compound fuzzy matter element, and calculate the weights of each index with AHP, construct degree Evaluation Model with the concept of closeness, in order to achieve the stability evaluation of coal mining subsidence.

Both coal mine and land are important natural resources that human depend on for existence and development. Coal mining has contributed greatly to the development of economy and society in China. Meanwhile, subsidence induced by coal mining has seriously affected human life, ecological environment and development of regional economy in mining area. Thus, aiming at coal mining subsidence area, this paper puts forward two kinds of land reclamation techniques containing engineering reclamation technology and biological reclamation technology, which can scientifically guide land reclamation practice, coordinate relationship between human and land and relax ecological crisis.

At present, the most direct and extensive research method which in the field of engineering geology and rock soil mechanics is a numerical analysis method .But the numerical analysis method is developing from two-dimensional to three-dimensional . The slope stability not only has something to do with engineering geological condition , but also with the concave and convex extent of the slope. The text tries to present the three-dimensional effect of the slope by the three-dimensional model, and takes the example of Jilinguole 2 strip mine irregular three-dimensional slope, researching the three-dimensional model method of the irregular slope stability by AUTOCAD and ANSYS, founding the FLAC3D.This paper analyzes the stability of the Jilinguole 2 strip mine south slope by numerical simulation analysis.

The control technology for mining subsidence is the main research area of mining subsidence. Its objective is to study and select mining methods appropriate for reducing the surface and overlying strata subsidence and protecting the surface structures. Referring to the analysis of references, the control technology for mining subsidence is discussed from several aspects including backfill mining method, partial mining method, backfill the collapsed cavities in overlying strata, harmonized mining method and 3-step mining method, stripping mining-goaf grouting, and backfill-strip pillar mining. The developing trend of the control technology is also prospected.