Study On Technological System Complexity On Fully-mechanized Long-wall Mining In Soft And Unstable Coal Seam With Large Dip Angle

Rock breaking complex faulting,the problem of supporting and mine pressure behavior characteristics in soft and unstable coal seam with large dip angle has led to frequent problems in working face of low yield,high labor intensity and poor working environment etc..Therefore,it is urgent to study systematically the theory of mining coal seam with large dip angle and unstable coal seam.Ming technology study and system complexity study on fully-mechanized long-wall mining in soft and unstable coal seam with large dip angle are summarized in this thesis.The connotation of dip inclined coal seam was defined.The significance and effect of complexity study on dealing with complex mining problems ware indicated.lt was advanced that caving fully-mechanized technological system complexity study on soft and unstable coal seam with large dip angle should be guided by ideology and means of system complexity.The main research results are as follows:(1)Aiming at the problems of soft and unstable coal seam with large dip angle which arose,this paper studies the conducted principle of complicity of the system of fully-mechanized long-wall mining in soft and unstable coal seam with large dip angle based on the perspective of complex science.And the qualitative and quantitative analysis of the major factors affecting caving fully-mechanized system are summarized.(2)Coal seam angle complexity,geographical complexity and support system complexity which brings technological system complexity of fully-mechanized long-wall mining in soft and unstable coal seam with large dip angle are quantified by erecting mathematics model.According to those,mining complexity measurement of Changshanzi is educed.The complex adaptive system model is established so as to qualitatively describe the internal mechanism and the relationship of the system;The weight of the evaluation indexes are analyzed through the multi-level analysis model.(3)Take 1125 fully-mechanized caving face in Changshanzi Gansu as an example,equipment selection,underground rock behavior,support system and caving fully-mechanized system of fully-mechanized technological system in soft and unstable coal seam with large dip angle of Changshanzi.The effect of complexity on locale handling is analyzed.The results of this study can be used for reference to solve the problems of low production and field operation in the long wall caving face with the same type of steep coal seam.At the same time stressed that to solve this kind of problems,according to the research ideas and methods,a comprehensive analysis of the relationship between various factors,and find the source of complexity,not only can greatly improve the efficiency of coal mining,but also to eliminate security risks from nature,to avoid major accidents.