旧采区复采采场围岩应力分布研究

Study on Stress Distribution of Surrounding Rock at Repeated Mining Stope of Residual Coal Area

通过对望田煤业旧采区赋存结构的调研,总结了3种不同的旧采区顶板力学模型,对力学模型进行理论分析,得到顶板最大应力出现在靠近煤柱处。采用PFPA软件对旧采区复采过空巷、过煤柱时复采采场顶板和煤柱进行数值模拟,初步给出了过空巷、过煤柱时应通过注浆、充填、提前支护空巷控制顶板的技术措施。

Through the investigation on existence structure of the residual coal area in Wangtian,3 kinds of roof me- chanical models for different residual coal area was established. The analysis on the mechanical models shows that the maxi- mum stress of the roof is nearby coal pillars. Numerical simulation on roof and coal pillar of the repeated mining stope across the gob and coal pillar in residual coal area was made with PFPA software. Such technical measures as grouting, filling, and forepoling to support the roof across the gob and coal pillar were initially proposed.