Research On Optimization Of Simultaneous Exploitation Of Coal And Gas Collaboratively Of Single Seam

At present,Simultaneous extraction of coal and gas technology is ahead of theory in our country.In view of practical problem that coal and gas can not achieve simultaneous extraction collaboratively in the process of high gas mine.This thesis devoted to sensible time series of Simultaneous extraction of coal and gas collaboratively parameter on the base of space-time coordination properties.It has the vital significance to establish theoretical system of Simultaneous extraction of coal and gas.Based on the mining science theory,operations research and optimization theory,mine safety theory and gas flow theory,Simultaneous extraction of coal and gas has been divided into coal mining and gas extraction.This thesis analyses inter restricted relationship between coal mining and gas extraction.Coal mining and gas extraction have to satisfy to restricted condition of safety and high effective product.Finally,coal mining and gas extraction constraint condition are set up.Besides,gas extraction has been divided into pre-mining gas extraction,mining gas extraction and goaf gas extraction three stages,and this thesis set up constraint condition for every stage.By use of multi-objective optimization method,taking economic benefit maximization and coal recovery rate maximization and gas extraction efficiency maximization as objective function,taking exploitation quantity and gas extracting quantity as optimization variable,taking relevant regulations and actual conditions which should be met in the alcohol-recovery procedure of coal and gas safety and efficiently as constraint condition,mathematical optimization model of Simultaneous extraction of coal and gas collaboratively of single seam is built.At the same time,in order to provide accurate cost data and strengthen the capacity of cost control,new cost accounting method for coal enterprise is put forward.By solving optimization model of Simultaneous extraction of coal and gas collaboratively of single seam,the optimal coal mining quantity and gas extraction quantity are obtained,and Simultaneous extraction of coal and gas collaboratively parameter which include reasonable daily output,roadway driving speed,pre-mining gas extraction time,pre-mining gas extraction quantity,mining gas extraction quantity and goaf gas extraction quantity are got.Finally,both of optimization model and cost accounting method are achieved in Zhangcun coal mine 2306 working face.The results show that total profits of 2306 working face increased by 2993036 yuan after optimization,mining recovery rate increased from 93.5%to 94.47%,gas extraction rate increased from 32%to 33.76%.Coordination between coal mining and gas extraction is also improved.