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陶庄煤矿水采二号煤层冲击地压发生频繁。作者在现场研究实践的基础上,通过相似材料和有限元模拟研究,认为陶庄煤矿发生冲击地压的原因是: 1.在高应力区开拓巷道,造成支撑约束条件的改变,破坏了煤体平衡条件; 2.由于悬露面积增大或老顶来压引起支承压力集中和转移。防止冲击地压发生的关键是采取合理的开采程序,实现在低应力区掘进和维护巷道: 1.所有分段上山顺煤流方向回采; 2.分段上山所有区段应采取图8所示3区段联合推进的开采程序; 3.在上山煤柱中,可以考虑采用沿采空区边缘重新掘溜煤上山,沿走向布置回采巷道的方案。最后作者介绍了利用顶底板移近量曲线的最大曲率点推断支承压力高峰位置和利用顶板断裂前后压力显现变化规律推断老顶来压进行冲击地压预测的新方法。
Taozhuang coal mine water mining two coal seam rock burst occurred frequently. On the basis of the field research and practice, through the study of similar materials and finite element simulation, the author thinks that the reasons for the rockburst in Taozhuang Coal Mine are as follows: 1. Open up the roadway in high stress area, resulting in the change of supporting restraint conditions and the destruction of coal Balance conditions; 2 due to the increase in the area of the hanging or the old roof pressure to support the concentration and transfer of support pressure. The key to prevent the occurrence of rock burst is to adopt reasonable mining procedures to realize tunneling and maintenance in low-stress areas: 1. All sub-sections are to be mined along the coal flow direction; 2. All sub-sections up the mountain should be taken as shown in Figure 8 3 section of the joint promotion of the mining process; 3. In the pillars of the hill, you can consider using along the edge of goaf dredging coal up the mountain, along the layout layout of the roadway. In the end, the author introduces a new method to estimate the rock burst by using the maximum peak pressure of top-plate approach curve to deduce the peak position of support pressure and the variation of pressure before and after roof fracture.