浅埋煤层综采工作面地表移动规律研究

Study on surface ground movement law above fully- mechanized mining face in shallow depth seam

为了控制煤层开采对东胜地区脆弱的生态系统的破坏,获得该地区综采工作面地表移动变形规律,采用在综采工作面上方建立地表移动观测站的方法,经过多次观测获得数据并进行处理分析,结果表明:地表刚开始移动就表现出突然性、剧烈性的特点,下沉值急剧增大,并很快达到最大值,达到充分采动;工作面停采后,地表短时间内达到稳定状态。在开切眼附近煤柱侧50 m、采空区侧100m为集中变形区域,该区域内地表变形值超过建筑物I级损坏标准。概率积分法预计参数取值为下沉系数0.71,水平移动系数0.40,左拐点偏移系数0.07,右拐点偏移系数0.37。

In order to control the seam mining to the failure of the weak ecological system in Dongsheng Area,the deformation law of the surface ground above the fully- mechanized coal mining face in the area was obtained. A method to build the surface ground movement observation station was applied and the processing analysis was conducted on the data from the several observations. The results showed that the initial movement of the surface ground had sudden and serious features and was a high increased subsidence value,a rapid reached max value and full mining activity. After the mining operation of the coal mining face completed,within a short time period,the surface ground was reached in a stable status. There would be a concentrated deformation area at the coal pillar side with a distance of 50 m to the open- off cut and a side area with a distance of 100 m in the goaf and surface ground deformation value in the area was over the I grade failure standard of the building. With the predicted parameter value by the probability- integral method,the subsidence coefficient was0. 71,the horizontal movement coefficient was 0. 40,a deviation coefficient of the left inflexion point was 0. 07 and a deviation coefficient of the right inflexion point was 0. 37.