Technology Of Safe And Efficient Comprehensive And Transportation System In Shunhe Coal Mine

Based on the engineering background of Shunhe Coal Mine 2402 belt trough bottom pumping roadway,in order to improve the tunneling efficiency of rock roadway,on the basis of coal and rock mechanics testing and surrounding rock structure detection,combined with geological conditions and the comparative analysis of tunneling equipment footage,efficiency and cost,the paper determines the integrated tunneling equipment technology of rock roadway with EBZ-318(H)type cantilever tunneling machine as the main part.The excavation efficiency scheme and support scheme are optimized,and the efficient gangue extraction mode of "working face boring machine + working face belt conveyor + combined roadway transfer machine(or distributed buffer gangue bin)+ centralized belt conveyor + centralized gangue bin" is constructed to realize the high efficiency of the mine gangue transport system,and the following conclusions are obtained:1)The monthly footage,efficiency and consumption cost of three kinds of technology,rock method,rock line and machine construction,are compared.Combined with mine design,in order to ensure that the average footage is kept at150m/ month or above,EBZ-318(H)type cantilever machine is finally selected as2402 belt groove bottom pumping roadway equipment.2)According to the tunneling requirements of EBZ-318(H)type cantilever roadheader,the section adjustment,support design and construction technology selection of 2402 belt channeling bottom pumping roadway were carried out,and the efficiency optimization scheme of roadheading technology was proposed.Through the use of new gear,airborne temporary support,self-moving tail and KCG-series dry dust collector with local fan to form a "long pressure short suction" method of dust removal system,the system optimized the roadway tunneling process,effectively improve the roadway tunneling speed.3)The roadway support scheme is "gradient optimized".In the first stage,theΦ20×2000mm left-spiral steel high-strength anchor bolt with 800×800mm interrow spacing is adopted,and the Φ21.6×7300mm anchor cable with 1500×2400mm interrow spacing is adopted.The second stage chooses Φ21.6×5300mm anchor cable;The spacing between rows is 1500×2400mm;With the diameter of 21.6×5300mm anchor cable strand construction in three stages,the point anchor cable supports the roof and the cable layout is adjusted from "three-three-three" layout to "one-twenty-one".After the optimization of roadway support scheme,the average is increased by 1.4m/ day.4)The design scheme of construction location and capacity parameter calculation of concentrated gangue silo is determined,and the transformation scheme of working face section transportation system of "laying belt conveyor + setting buffer gangue silo" is proposed.Through AHP-FCE evaluation method,the stability evaluation index system of mine gangue storage and transportation system is established,the fuzzy evaluation model of reliability status of mine gangue storage and transportation system is constructed,the influence weight of each evaluation factor on the system is determined,and the evaluation grade of mine gangue storage and transportation system is "relatively stable".There are 40 figures,28 tables and 70 references in this thesis.