Close Shallow Seam Mining Rock Structural Features And Control Technology Research

Shendong mining as the first one hundred million ton mining area, with the increasing intensity of mining, mining some of the special geological conditions, such as close, thin bedrock fault zone, in the special geological conditions, mining easy steps to sink, the pressure frame, floods and other disasters, Strata behavior different intensity. This article according to east the god Shi Getai the ore shallow burying depth, the short distance this special geological condition, unifies the scene actual observation data and the theoretical analysis, to the level spacing1-6meter,6-15meter,15meters the shallow submersion short distance coal bed ore presses the appearance by the superior different situation in the rule and analyzes its reason, with the stability which picked carries on to the short distance coal bed has analyzed and proposed the safe mining measure, the appraisal and under the forecast shallow submersion short distance condition the support shaping and the reasonable working resistance. The following conclusions by studying1)12103Face Shigetai field observations, summed up the shallow distance seam mining face pressure behavior law and influencing factors, analysis of the pressure behavior law of the special area of the spacing of the different layers and through coal pillar mine. 2) Analysis of overlying rock movement law under the condition of short distance, was established near distance coal seam with coal mining face under the conditions of the theory of rational staggered distance model, raised regulators type layout with decompression-type arrangement to come up with rational staggered distance formula, combined with the space between layers and layer instability of rock, made a short distance coal seam mining conditions of security.3) Establishment of three kinds of stents-rock mechanics model of the upper and lower seam mining caving zone through (different layer spacing)12103Face rated resistance was validated by the specific conditions combined with the adjacent face of its reasonable working resistance forecasts, provides a basis for stent selection.4) According to the coal column the peripheral region stress distribution rule, the ore returned to Shi Getai in the short distance condition one after next coal bed picks the tunnel arrangement form to conduct the research, summarized three kind of different arrangement suitable conditions and the arrangement parameter.