Surface Movement and Deformation Law of 4302 Working Face in Shanxi Sanyuan Coal Industry Co.,Ltd.
The establishment of safety coal pillars is to protect buildings,major shafts,and the ground ecological environment.The geological conditions of mining by Sanyuan Coal Industry Co.,Ltd.were analyzed,and the representative 4302 working face in the fourth mining area without surrounding goaf was selected.A surface movement observation station was established,and the surface movement deformation law and various parameters of movement deformation angles under the conditions of fully mechanized top coal caving mining were obtained through on-site measurement and calculation.Its movement and deformation curves basically conformed to the basic shape of the movement and deformation curves of mining subsidence.The initial stage of maximum subsidence was 27 d,the active period was 210 d,and the decline stage was mainly concentrated in the active settlement period due to the influence of mining near the working face.
surface movement and deformationobservation station layoutfully mechanized working faceSanyuan Coal Industry Co.,Ltd
NETL
NSTL
万方数据
