The Research Of Dynamic Forecast Parameters On Gas Emission Of Mining Face Of Linnancang

Gas disaster is one of the important factors affect the mine safety production,gas accident is one of the most serious accident in coal accidents in our country.With the development of the modern comprehensive mechanized coal mining, coalmining intensity and mining speed has become the future development trend ofChina’s coal production. At the same time, the gas emission is also increasing.Therefore, to strengthen the mining working face gas emission prediction technologyresearch, predict the working face gas emission, to guide the mine ventilation designand gas drainage design and gas prevention and control work has importanttheoretical significance and practical value.This paper in the further study of existing gas emission prediction method, onthe basis of induction and summarizes the advantages and disadvantages of all kindsof gas prediction method and use scope, and put forward should be aimed at theactual situation of mine to choose the appropriate forecasting methods. Then byanalyzing the generating mechanism of gas, the migration law of gas in coal seamand surrounding rock, and the main factors affecting gas emission. Learned thatusing traditional calculation method of the coal working face gas emission quantityof gas emission and geologic exploration phase there is a big difference betweenactual measurement of gas emission of reason, besides because of affected by miningprocess. In most cases it is people not reasonable consider when to calculate the gasemission of coal seam roof and floor rocks to the influx of stope gas amount. Andthat coal measures strata lithology combination and the permeability of coal seamgas content has a significant impact.Based on this, This article first partition and application of the theory of gasemission equivalent layer method, using the data of mine geological drilling andshimen sketch linnane storehouse, analysis, draw the linnane storehouse mining coalseam8-1,11and12coal seam mining of coal seam equivalent figure, at the sametime in the original based on the theory of equivalent lithology identify, puts forwardthe method to calculate the equivalent lithology of igneous rock, and according tothe actual influence of igneous rock of gas emission and igneous rock physicalproperties (porosity and permeability),12coal seam roof and floor of the igneousrock equivalent into grit; Then on the basis of local gas monitoring data and draftreport records, affect the coalbed gas emission factors in the quantitative calculation,the quantitative parameters of filling to the database will affect factors, in order todynamic software of mining working face gas emission forecast to provide data support. The mining of linnancang coal seam gas emission factors of quantitativeparameters, so as to establish a mining working face gas emission forecast system, toprevent the mine of linnancang gas accident has very important practicalsignificance.