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利用低能爆炸加载方式,采用相似材料模拟试验方法,借助数字散斑光测手段(DSCM),研究高速冲击载荷作用下吸能支护巷道变形规律。试验结果表明,巷道顶板首先出现微裂缝,顶板向下位移约为0.6 mm,顶板岩层与煤层交界处无错动现象,冲击波重复作用使得模型顶面出现贯通裂缝,但巷道及周围岩体并无破坏,说明吸能支护可吸收大量冲击能,从而有效降低对巷道的冲击破坏。通过模拟试验结果可知,采用吸能支护可大大降低巷道的破坏程度,对于采矿工程安全生产具有实际意义,同时为巷道支护提供一种新方法。
Using low-energy explosive loading method, similar material simulation test method was used to study the law of deformation of energy-dissipative support roadway under high-speed impact loads by digital speckle photometric method (DSCM). The test results show that the micro-cracks in the roadway roof first, the downward displacement of the roof is about 0.6 mm, there is no dislocation phenomenon at the junction of the roof rock and the coal seam. The repeated impact of the shock wave causes the through cracks in the top of the model, Destruction, indicating energy absorption support can absorb a large number of impact energy, thus effectively reducing the impact of roadway damage. The simulation results show that the use of energy-absorbing support can greatly reduce the degree of damage to the roadway, which has practical significance for the safety of mining engineering and provides a new method for roadway support.