摘要
通过对矿压观测数据的分析,得出埋深约65m的神武煤田浅煤层,老顶同样存在台阶式下沉的周期来压现象。据此认为要维护好顶板必须提高支架的工作阻力。
The result of the analysis of underground pressure obervation deta indicates that the main roof of the coalseam at the depth of around 65 m has also the periodicweighting phenomenon with a weighting span of 6~9m. When the face is supported by individual prope, thedynamic load coefficient is great, being 2.3~4.3. Dur-ing the period of the main roof weighting, the roof ap-pears stepped subsidence, which implies that the equilibri-um structure of the overlying strata, after they were bro-ken, destabilizes due to the shearing failure. Hence, it isconsidered that in oredr to improve the condition of roofmaintenance, the working resistance of supports shouldbe enhanced.
出处
《矿山压力与顶板管理》
1992年第2期33-37,79-81,共5页
Ground Pressure and Strata Control