摘要
According to the geological and mining technical conditions of No.18128 sub- level caving face with suspend-shift support,the first working face of the working area,the distribution laws of abutment pressure were studied by jointly employing FIAC^(3D) numerical simulations and field tests.With the full consideration of these laws and the service time- limit of the mining district,the optimal location of the terminal mining line,should be 60 m away from the W4-B8 track dip,which was 20 m shorter than the 80 m distance deter- mined according to traditional experiences.The retained coal safety pillar for the protect- ing of dips,already proved by the industrial practice,can not only improve the rate of coal recovery and satisfy the subsequent service requirement for the following working faces, but also decrease the maintaining expenditure and thus increase profits.
According to the geological and mining technical conditions of No.18128 sublevel caving face with suspend-shift support, the first working face of the working area, the distribution laws of abutment pressure were studied by jointly employing FIAC3D numerical simulations and field tests. With the full consideration of these laws and the service timelimit of the mining district, the optimal location of the terminal mining line, should be 60 m away from the W4-B8 track dip, which was 20 m shorter than the 80 m distance determined according to traditional experiences. The retained coal safety pillar for the protecting of dips, already proved by the industrial practice, can not only improve the rate of coal recovery and satisfy the subsequent service requirement for the following working faces, but also decrease the maintaining expenditure and thus increase profits.
基金
the National Natural Science Foundation of China(50674002)
the Educational Department of Anhui Province(KJ2008B109)
关键词
综放采场
煤矿
矿压监测
走向压力分布规律
thinner thick-seam, suspend-shift support, sublevel caving face, terminal line
