Research On The Law Of Mine Pressure And Support Resistance In Large Height Fully Mechanized Coal Mining Face Covered With Thick Loose Bed

Shengli Coal Mine is located in the south of Yushen mining area, the mine is underconstruction, its3#coal seam belongs to shallow buried, thick bedrock,overlying thick sandlayer. In the mine’s construction,workers discovered that the rock stratum has three layers ofhard rock with larger thickness on top of3#coal seam,and its thickness reaches80~95meters,the bottom layer of hard rock has maximum strength, its uniaxial compressive strengthis about90MPa.The hard rock is covered with thick sand stratum which is49~60m. It has nomature mining experience in the surrounding of Shengli Coal Mine,and in recent years,thelarge height fully mechanized mining which is high yield and high efficiency has become thepreferred method for mining, so the support resistance increases ceaselessly, supportinginvestment soared with the mining height increases, the selection and design of support is lackof scientific, these questions become one of the main problems to be solved to realize safetyand high efficiency production in the future.This article researches on pressure behavior law of systematic of large mining heightfully mechanized coal mining face about3#coal seam comprehensive,thus understands theoverlying strata in longwall faces and the motion law of abutment pressure distribution ruleand support parameters in the specific conditions.So that the results can make the selection ofsupport design more scientific and reasonable,support investment more economical,supporting selection more reasonable,at the same time,the results have practical guidance andreference significance.The paper relies on the research project---Research on the law of mine pressure andSupport resistance in large height Fully mechanized coal mining face covered with thick bed rock and thick loose beds, makes special geological condition of the Shengli Coal Mine asthe geological background, researches on strata behavior regularity and the supportparameters in large mining height face with thick bedrock and thick loose layer on ShengliCoal Mine with the methods of rock mechanics experiment and mechanical model theoreticalanalysis;And use the physical simulate study on the strata behavior regularity and the supportparameters in large mining height face with thick bedrock and thick loose layer on ShengliCoal Mine; Further,use the numerical simulation verify and supplement the results of thephysical simulate. At last,use the mechanical model analysis and collect information ofChina’s23working face with large mining height. Study on the law of mine pressure and inlarge height Fully mechanized coal mining face, and on this basis, determine the workingresistance of support Shengli mine,providing theoretical support for support selection andsafety and high efficiency production of the mine with similar geological conditions.