Study On Reasonable Parameters Of Coal Pillars In Suntuancoal Mine On 10

This paper on the safety of the sun Tuan coal mine 1011 working face mining this paper.moreover parameter study,through the systematic analysis of sun Tuan mine 1011 working face of geological and hydrogeological characteristics,on the basis of the building,water,railway and main shaft and design,and coal pillar mining regulations "and" the detailed rules for the prevention and control of coal mine water ","two belts" height measured data collected a large number of mines,the numerical simulation technique,neural network and the analogy method of sun Tuan coal mining working face mining characteristics of "two belts" of analysis,reasonable to calculate the height of the "two belts",determine a reasonable design,safety coal and rock pillars height:1?The paper identified the lithology and combination characteristics of the "four contained" and "three separated" zones in the study area.The "four contained" zones are 0—17.76 m thick with an average thickness of 3.19 m.The distribution is unstable and some areas are missing.2?The thickness of the "third compartment" is 21.66—63.74 m,with an average thickness of 41.73 m.The bedrock weathering zone in the study area has a thickness of 13.12—35.11 m,with an average thickness of 24.76 m.It has a certain water-retaining capacity and weak water-rich property.3?The roof of coal seam belongs to the water-rich weak aquifer and the overburden failure type is the medium hard type developed by the primary longitudinal fracture.4? Determine the water level of mining to ? can design according to the sand control safety coal and rock pillars stoping upper limit.Combined with the measured height of "two belts" in the mine,it is concluded that the caving height is 12.00 m,the splitting height is 44.00 m,the caving ratio is 4.21,and the splitting ratio is 15.44.Figure 44 table 34 reference 64...