山西三元煤业4302工作面开采地表移动变形规律研究

Surface Movement and Deformation Law of 4302 Working Face in Shanxi Sanyuan Coal Industry Co., Ltd.

留设安全煤柱是为了保护建筑物、主要井巷和地面生态环境。分析了三元煤业开采的地质条件,并选取了有代表性、周边无采空区的四采区4302工作面,建立了地表移动观测站,通过现场实测和计算获取了综采放顶煤开采条件下地表的移动变形规律及各种移动变形角的参数,其移动与变形曲线基本符合开采沉陷的移动与变形曲线基本形态,最大下沉的开始阶段为27 d,活跃期为210 d,衰退阶段因受邻近工作面开采影响,地表沉陷变形主要集中在沉降活跃期。

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.