Study On The Technique Of Industrial Factory Building On The Gangue Of Ground In The Coal Mining Subsidence Area

The damage of geological environment is serious from the coal mining, the major representations are subsidence of ground and fallow of farmland, deformation and crack of farmhouse, occupation and pollution of abandoned gangue, circulatory systems of groundwater suffering damage. Something more in recent years, large-scale construction lands are urgent need with the development of country's economy, and the contradictions between man and land, man and environment are prominent seriously. So, the background of the dissertation is comprehensive governance engineering of geological environment of ending coal mine in GangKou, and the techniques and methods of constructing the large-scale industrial plants are explored on the stable gangue ground in the coal mining subsidence zones where have backfilled by gauge. The transitions are realized from abandoned lands to industrial construction land in subsidence area and from abandoned gangue to the comprehensive utilization of reclamation. As a result, the economic benefits, environmental benefits and social benefit are obtained obviously, and it possesses the important values of popularization and application.The main topics of this thesis are as follows:Firstly, the deformation characteristics and mechanical mechanisms of surface movements in ending coal mine are revealed by the theoretical analyses and large-scale physical model test. The prediction of deformation parameters of surface movement and a new approach of calculation are put forward in ending coal mines based on the theoretical system of the subsidence and control in mining at present. The joined methods are come true between the governing in coal mining subsidence zones and the subsidence controlling caused by coal mining in special landform. The values of all items have the evidence which can be investigated, and this provides the science foundations for selections of locations of groundwork's backfilling with coal gauge and industrial plants.Secondly, numerical analysis is carried out for the backfilled workground with layered coal guage and clay and backfilled workground with clay only under the effects of gravity, uniform load and point load by ANSYS software. The differences of numerical simulation about the maximum settlement, maximum horizontal displacement, interior maximum vertical stress and maximum horizontal stress in the two kinds ground are analyzed and compared. The results indicate that the backfilled workground with layered coal guage and clay is better than the backfilled workground with clay only for the engineering performance aspects of anti-settlement, anti-horizotal deformation, compressive strength and tensile strength.Thirdly, based on the theoretical analyses,experiment in lab and engineering practice,the characteristics of physics, chemistry and mechanical capabilities of coal gangue.The engineering geological characteristics and constructing technics about the backfilled groundwork with layered coal gauge and clay are studied and discussed in the coal mining subsidence zones.The characteristics of compaction, permeability, water stability, capacity, deformation and intensity are revealed about the backfilled groundwork with coal gauge.The controlling standard of quality, process flow, roller way, the parameters of dynamic compaction of the backfilled groundwork with coal gauge are put forward. An empirical formulas about propagation law of compaction energy in the backfilled groundwork with coal gauge by dimensional analysis, and all of these become a set of technologies about reinforcement and disposition for the backfilled groundwork with coal gauge in the coal mining subsidence zones and methods about building the industrial plants on the stable coal mining subsidence zones. The extension of reclaim and application of coal guage is extended by the technologies and methods above,and the level of management techniques about ecological environment is improved in the coal mining subsidence zones,and achieved the sustainable development of the ending mining mines. .